Sites
- Złoty Stok Gold Mine
- 'Waterworks' Munitions Store (Ho4) Jersey
- Abbey Mills Pumping Station
- Abbots Ripton ROC Post
- Abbotsbury ROC Post
- Abbottswood AAOR
- Aberangell ROC Post
- Aberchirder ROC Post
- Aberconwy Emergency Control Centre
- Abercrave ROC Post
- Aberdaron ROC Post
- Aberdeen Civil Defence Control
- Aberdeen Tertowie House Grampian Regional Council Emergency Centre
- Aberdovey ROC Post
- Aberfeldy ROC Post
- Aberfoyle ROC Post
- Abergavenny ROC Post
- Abergwesyn ROC Post
- Aberlady ROC Post
- Aberlemno ROC Post
- Abernyte ROC Post
- Aberporth ROC Post
- Abersoch ROC Post
- Aberystwyth ROC Post
- Abington ROC Post
- Aboyne-Dinnet Vault
- Abri de Bockange, Maginot Line
- Abri de Hatten, Maginot Line
- Acaster Malbis Airfield Battle HQ
- Achnasheen ROC Post
- Acomb York ROC Group HQ
- Acton ROC Post
- Adel Quarry WWII Document Store
- Admiralty Citadel
- Aird Uig Rotor Radar Station
- Airdrie ROC Post
- Akeman Street Airfield Battle HQ
- Alconbury Airfield Battle HQ
- Aldbrough ROC Post
- Aldeburgh ROC Post
- Aldeby ROC Post
- Alderbury ROC Post
- Alderley Edge Mines
- Alderminster ROC Post
- Alderney Civil Defence
- Alderney Essex Hill Ho2 Munitions Store
- Alderney Fortress Commanders Bunker
- Alderney Lager Sylt Concentration Camp
- Alderney Mannez Quarry Ho1 Munitions Store
- Alderney Water Lane Ho5 Fuel Store And Power Station
- Alderney Water Lane Ho6 Munitions Store
- Alderneyluftwaffe HQ and Observation Tower
- Aldershot Command Bunker
- Alderston House - Lothian Region, Alternative Standby Headquarters
- Alderton ROC Post
- Aldford ROC Post
- Aldwych Holborn Branch Line
- Alencon Link Basingstoke SRHQ
- Alexandria ROC Post
- Alford (Lincs) ROC Post
- Alford ROC Post
- Allhallows ROC Post
- Alloa ROC Post
- Allonby ROC Post
- Alston ROC Post
- Alt Rehse Bunker
- Altengrabow Training Area
- Altnaharra ROC Post
- Alton Barnes Airfield Battle HQ
- Altona Harbour Railway Tunnel (Schellfischtunnel or 'Haddock' Tunnel) Hamburg
- Altrincham ROC Post
- Alyth ROC Post
- Ambergate ROC Post
- Amesbury ROC Post
- Amlwch ROC Post
- Amman Valley ROC Post
- Ampthill ROC Post
- Anchor Inn Salterforth
- Andoversford ROC Post
- Angle Airfield Battle HQ
- Annan Airfield Battle HQ
- Annesley Colliery
- Anstruther Rotor Radar Station and Scotland North Zone HQ
- Appin ROC Post
- Appleby ROC Post
- Arborfield ROC Post
- Arbroath ROC Post
- Archaeological Crypt of Notre Dame
- Ardgay ROC Post
- Ardglass ROC Post
- Ardintoul Talc Mine
- Arduaine ROC Post
- Ardvasar ROC Post
- Argos Hill Tunnel
- Arholma Battery
- Arisaig ROC Post
- Arley ROC Post
- Armagh ROC Post
- Armathwaite ROC Post
- Arndale Underground Market, Manchester
- ARP Control Centre Stewarts and Lloyds Steelworks Corby
- ARP Control Centre, Clifton, Bristol
- Arras Boves
- Arras Citadel
- Arrington ROC Post
- Arrochar ROC Post
- Ascot ROC Post
- Ash ROC Post
- Ashbourne Airfield Battle HQ
- Ashburton ROC Post
- Ashbury ROC Post
- Ashkirk ROC Post
- Ashley Road Air-Raid Shelter Epsom
- Ashover ROC Post
- Ashwell ROC Post
- Askern ROC Post
- Atcham Airfield Battle HQ
- Athelstaneford ROC Post
- Atherton ROC Post
- Attlebridge Airfield Battle HQ
- Auchenblae ROC Post
- Auchenmalg ROC Post
- Audlem ROC Post
- Auldgirth ROC Post
- Aultbea ROC Post
- Avebury ROC Post
- Avenue House ARP Headquarters
- Aviemore ROC Post
- Axminster ROC Post
- Aycliffe ROC Post
- Ayle Colliery
- Aylesbury Buckinghamshire County Emergency Centre
- Aylsham ROC Post
- Ayr Airfield Battle HQ
- Ayr ROC Group HQ
- Aysgarth ROC Post
- Backbarrow ROC Post
- Bacton ROC Post
- Bacup ROC Post
- Badingen Vega Missile Site
- Badingham ROC Post
- Baginton Airfield Battle HQ
- Baginton Hall Ice House
- Bala ROC Post
- Balaklava Soviet Submarine Base
- Balderton Airfield Battle HQ
- Balerno ROC Post
- Ballantrae ROC Post
- Ballater ROC Post
- Balls Green Stone Quarries
- Ballycastle ROC Post
- Ballyclare ROC Post
- Ballymena RGHQ
- Ballymena ROC Post
- Ballymoney ROC Post
- Ballynahinch ROC Post
- Ballywalter ROC Post
- Bamburgh ROC Post
- Bampton (Dev) ROC Post
- Bampton ROC Post
- Banbridge ROC Post
- Banbury Cherwell District Council Emergency Centre
- Bangor ROC Post
- Bankfoot ROC Post
- Bannockburn ROC Post
- Banwell Bone Caves
- Bard Hill Chain Home Low Radar Station
- Bardney Airfield Battle HQ
- Bardney ROC Post
- Barford ROC Post
- Barford St John Airfield Battle HQ
- Bargoed ROC Post
- Bargrennan ROC Post
- Barham ROC Post
- Barhill ROC Post
- Barkston Ash ROC Post
- Barmouth ROC Post
- Barnby ROC Post
- Barnham Nuclear Bomb Store
- Barningham ROC Post
- Barnstaple ROC Post
- Barnton Quarry Rotor SOC and Regional Seat of Government
- Barnwood ROC Post
- Barons' Cave
- Barr ROC Post
- Barrhead ROC Post
- Barrock ROC Post
- Barrow Airfield Battle HQ
- Barrow-in-Furness ROC Post
- Barton-upon-Humber ROC Post
- Barwick-in-Elmet ROC Post
- Basilica of St Clement
- Baslow ROC Post
- Bassenthwaite ROC Post
- Bathampton Patrol Auxiliary Units OB
- Bathgate ROC Post
- Battery Lothringen and Command Post
- Battery Moltke, Jersey
- Baumber ROC Post
- Bawburgh Rotor SOC and RGHQ
- Bawdsey Chain Home Radar Station
- Bawdsey R7 Remote Type 7 Radar
- Bawdsey Rotor Radar Station
- Bawdsey Rotor Tx Rx Buildings
- BBC Broadcasting House Stronghold
- BBC Wartime Broadcasting Service DF Transmitter
- BBC Wood Norton
- Beachy Head Rotor Radar Station
- Beacon Hill Fort
- Beaconsfield Buckinghamshire County Standby Emergency Centre
- Beaconsfield ROC Post
- Bearsted ROC Post
- Beattock ROC Post
- Beauchief ROC Post
- Beaulieu Airfield Battle HQ
- Beauly ROC Post
- Beccles Airfield Battle HQ
- Bedale ROC Post
- Beddgelert ROC Post
- Beddingham Cement Kiln
- Bedford ROC Group HQ
- Bedminster Sub Control
- Bedworth ROC Post
- Beech Caves Stone Quarry
- Beer Quarry Caves
- Beeskow Command Bunker
- Beith ROC Post
- Belfast Mount Eden Park Regional War Room
- Belfast Stormont Sub Control
- Bellasize Airfield Battle HQ
- Bellingham ROC Post
- Belsize Park Deep Shelter
- Bempton Rotor Radar Station
- Benefield ROC Post
- Benson Airfield Battle HQ
- Bentpath ROC Post
- Bentwaters Airfield Battle HQ
- Benwick ROC Post
- Beragh ROC Post
- Bere Alston ROC Post
- Bere Regis ROC Post
- Berkhamstead ROC Post
- Berkshire Country Council Emergency Control Bunker
- Berkshire County Council Standby Control Bunker
- Berlinertor Bunker, Hamburg
- Berry Bros and Rudd Cellars
- Berwick-upon-Tweed ROC Post
- Berwyn Tunnel
- Betchworth Buffer Food Depot
- Bethersden ROC Post
- Bethnal Green Underground Station
- Bettyhill ROC Post
- Betws Drift Mine
- Beverley ROC Post
- Bewerley ROC Post
- Bexhill Civil Defence Centre
- Bexley Emergency Centre
- Beyton ROC Post
- Bibury Airfield Battle HQ
- Bicester Airfield Battle HQ
- Bidford-on-Avon ROC Post
- Bidston Hill Air-Raid Shelter
- Biesenthal Stasi Bunker (5005)
- Biggin Hill Airfield Battle HQ
- Billericay ROC Post
- Billesdon ROC Post
- Billingborough ROC Post
- Billinge Beacon ROC Post
- Billinghay ROC Post
- Billingshurst ROC Post
- Binbrook Airfield Battle HQ
- Binbrook ROC Post
- Bircham Newton Airfield Battle HQ
- Birchington ROC Post
- Bircotes Airfield Battle HQ
- Birdsall ROC Post
- Birkenhead Wirral Metropolitan Borough Emergency Centre
- Birkenshaw AAOR
- Birkshead Gypsum Mine
- Birmingham Anchor Exchange
- Birmingham Civil Defence Bunker
- Birmingham Severn Trent Water Emergency Control Centre
- Birmingham Snow Hill Railway Control Centre
- Birmingham Victorian Trunk Sewers (Chamber)
- Birstall ROC Post
- Bishop Norton ROC Post
- Bishopsgate Goods Station
- Bisterne Airfield Battle HQ
- Bitche Citadel
- Bitteswell Airfield Battle HQ
- Blackbushe Airfield Battle HQ
- Blackford ROC Post
- Blackheath Hill Tunnel and Air Raid Shelter
- Blaenau Ffestiniog ROC Post
- Blair Atholl ROC Post
- Blakelaw 13 Group Fighter Command Filter Room
- Blakeney ROC Post
- Blakesley ROC Post
- Blandford Forum ROC Post
- Bleadon ROC Post
- Blean ROC Post
- Blegny Coal Mine
- Bletchley Buckinghamshire County Standby Control
- Bletchley ROC Post
- Blickling Ice House
- Blisworth Canal Tunnel
- Blochplatz Bunker
- Bloxham ROC Post
- Blue John Caverns and Mine
- Blunsdon Thames Water Control Centre
- Blyth (Notts) ROC Post
- Blyth Area Control
- Blyth ROC Post
- Blyton Airfield Battle HQ
- Bo'ness ROC Post
- Boars Hill ROC Post
- Bobbington ROC Post
- Bochnia Salt Mine
- Bock Casemates
- Boddam ROC Post
- Bodfari ROC Post
- Bodleian Library Tunnel and Underground Bookstore (Gladstone Link)
- Bodmin District Council Emergency Centre
- Bodmin ROC Post
- Bodney Airfield Battle HQ
- Bog Mine
- Bohus Fortress, Kungälv
- Bois des Huit Rues V1 Launch Site
- Bolton-by-Bowland ROC Post
- Bomb Store, Bronydd
- Bomere Heath ROC Post
- Bonnybridge ROC Post
- Bootle Merseyside County Main Emergency Centre 2nd Site
- Bootle ROC Post
- Bootle Tunnel
- Bordon ROC Post
- Boreham Airfield Battle HQ
- Boreland ROC Post
- Borough Green ROC Post
- Borras North Wales ROC Group HQ
- Boscobel ROC Post
- Boscombe down Airfield Battle HQ
- Boston ROC Post
- Boston Spa ROC Post
- Botesdale ROC Post
- Botley ROC Post
- Bottesford Airfield Battle HQ
- Bottesford ROC Post
- Bottisham Airfield Battle HQ
- Bottisham ROC Post
- Bouda Artillery Fortress
- Boulby Potash Mine
- Boulmer Rotor Radar Station
- Bourn Airfield Battle HQ
- Bourne Park Tunnel
- Bourne ROC Post
- Bovingdon Airfield Battle HQ
- Bow ROC Post
- Bowes Park ROC Post
- Brackla RGHQ / Royal Ordnance Factory
- Brackley ROC Post
- Braco ROC Post
- Bradfield ROC Post
- Bradford-on-Avon ROC Post
- Bradwell Bay Airfield Battle HQ
- Bradwell-on-Sea ROC Post
- Braemar ROC Post
- Braintree ROC Post
- Bramcote Airfield Battle HQ
- Bramley ROC Post
- Brampton ROC Post
- Brancaster ROC Post
- Brandesburton ROC Post
- Brandsby ROC Post
- Brassington ROC Post
- Brasted ROC Post
- Bratton Airfield Battle HQ
- Bratton ROC Post
- Braunston Canal Tunnel
- Braunstone Airfield Battle HQ
- Brechin ROC Post
- Brecon ROC Post
- Brede Southern Water Emergency Control Centre
- Brent Pelham ROC Post
- Brewery Shaft Rampgill Mine Nenthead
- Bride Chain Home Radar Station
- Bridge Of Earn ROC Post
- Bridge of Orchy ROC Post
- Bridge Of Weir ROC Post
- Bridgnorth ROC Post
- Bridlington ROC Post
- Brierley Hill ROC Post
- Brighouse West Yorkshire Sub County Control
- Brightlingsea ROC Post
- Brightlingsea Urban District Council Control
- Brighton Police Cells Museum
- Brighton Road Air Raid Shelter, Coulsdon
- Brighton ROC Post
- Brighton Sewers
- Brill ROC Post
- Brinklow Heath Protected BBC Transmitter Building
- Brinscall ROC Post
- Brislington Regional War Room
- Bristol Clifton Rocks Tunnel
- Bristol Waterworks Emergency Control Centre
- British Library Basements
- Briton Ferry ROC Post
- Brixham ROC Post
- Brixworth ROC Post
- Broad Chalke ROC Post
- Broad Haven ROC Post
- Broadford ROC Post
- Broadway ROC Post
- Broch of Gurness
- Brodick ROC Post
- Bromley Borough Control
- Bromley Palace Ice House
- Brompton Cemetery Catacombs
- Brompton Road Underground Station and Gun Operations Room
- Bromsgrove ROC Post
- Brookland ROC Post
- Brooklands Vickers Factory Workers Shelter
- Brora ROC Post
- Broughton Raf Longley Lane Comms Block
- Broughton Raf Longley Lane Filter Block
- Broughton-in-Furness ROC Post
- Brownlow House
- Brundall ROC Post
- Brunkebergstunneln
- Brunswick Tunnel Air Raid Shelter
- Bruntingthorpe Airfield Battle HQ
- Brusselton ROC Post
- Bruton ROC Post
- Brymbo ROC Post
- Brynmawr ROC Post
- BT Deep Level Tunnels, Cardiff
- BT Deep Level Tunnels, Edinburgh
- Bubeneč Sewage Works
- Bubwith ROC Post
- Buchan R7 Remote Type 7 Radar
- Buchan Rotor Radar Station
- Buckden (Cambs) ROC Post
- Buckden ROC Post
- Buckie ROC Post
- Buckingham ROC Post
- Buckland Newton ROC Post
- Buckminster ROC Post
- Bucksburn ROC Post
- Builth Wells ROC Post
- Bungay ROC Post
- Burgh-on-Bain ROC Post
- Burghill ROC Post
- Burntisland Railway Control Centre
- Burscough (HMS Ringtail) Airfield Battle HQ
- Burscough ROC Post
- Burton Agnes ROC Post
- Burton Bradstock ROC Post
- Burton Joyce ROC Post
- Burton Pidsea ROC Post
- Bury St. Edmunds ROC Post
- Bushmills ROC Post
- Buxton ROC Post
- Bwlch-Glas Lead and Silver Mine
- Byrness ROC Post
- Cabrach ROC Post
- Cae Coch Sulphur Mine
- Caerwent Royal Navy Cordite Factory and USAF Bomb Store
- Caister ROC Post
- Caistor Airfield Battle HQ
- Calais German Naval Bunker/WWII Museum
- Caldbeck ROC Post
- Caldy ROC Post
- Caledon ROC Post
- Caledonian Canal - Allt Sheangain / Torcastle Viaduct
- Caledonian Canal - Loy Aqueduct
- Caledonian Canal - Mount Alexander Aqueduct over Allt Mor
- Calke Abbey Gardeners' Tunnel
- Callander ROC Post
- Callington ROC Post
- Camberley ROC Post
- Camblesforth ROC Post
- Cambokeels Mine
- Cambrai Chalk Quarries
- Cambrai Citadel
- Cambridge Regional War Room RSG and RGHQ
- Cambridgeshire South Cambridgeshire District Emergency Centre
- Camden Borough Control
- Camden Catacombs and Horse Tunnels
- Camden Town Deep Shelter
- Camden Winding Engine Vaults
- Cammeringham Airfield Battle HQ
- Campsie AAOR
- Canada Dock Tunnel
- Canal Saint-Martin Tunnel
- Canford Cliffs ROC Post
- Cannich ROC Post
- Canobie ROC Post
- Canterbury Command Bunker
- Canterbury ROC Post
- Canvey Island ROC Post
- Canwick ROC Post
- Cap de La Hague Searchlight Bunker
- Capel Curig ROC Post
- Caradon Hill Mines
- Cardiff Castle Air Raid Shelters
- Cardiff Coryton Regional War Room
- Cardiff Landaff Sub Control
- Cardigan ROC Post
- Carew Cheriton Airfield Battle HQ
- Cark Airfield Battle HQ
- Carlisle ROC Group HQ
- Carlisle ROC Post
- Carluke ROC Post
- Carmarthen County Council Control Bunker
- Carmarthen ROC Post
- Carmarthen South Wales ROC Group HQ
- Carno ROC Post
- Carnoustie ROC Post
- Carradale ROC Post
- Carron ROC Post
- Carryduff ROC Post
- Carshalton Air-Raid Shelter
- Carsphairn ROC Post
- Carterton ROC Post
- Case Romane del Celio
- Casemate Esch, Maginot Line
- Castel Vendon Battery
- Castle Bytham ROC Post
- Castle Derg ROC Post
- Castle Douglas ROC Post
- Castle Headingham ROC Post
- Castle Kennedy Airfield Battle HQ
- Castledawson ROC Post
- Castlelaw Hill Fort and Earth House
- Castlepoint Borough Emergency Centre
- Castleside ROC Post
- Castleton ROC Post
- Castletown Airfield Battle HQ
- Castletown ROC Post
- Castor ROC Post
- Catesby Railway Tunnel
- Catforth ROC Post
- Catfoss Airfield Battle HQ
- Caton ROC Post
- Catrine ROC Post
- Caverne du Dragon
- Caversham Bridge
- Caves of Folx-les-Caves
- Cawdor ROC Post
- Cawood ROC Post
- Caxton ROC Post
- Ceinant ROC Post
- Central Regional Council - Emergency Headquarters
- Cerrigydruidion ROC Post
- Chaffinch Civil Defence Centre, Gothenburg
- Chafford Gorges Shelter
- Chalmers Tram Tunnel Gothenburg
- Champagne Caves
- Chandlers Ford ROC Post
- Channel Tunnel 1880 Attempt
- Chapel St. Leonards ROC Post
- Chapelle Sainte-Radegonde de Chinon
- Chard ROC Post
- Charing Cross Station
- Charlton Horethorne Airfield Battle HQ
- Charlwood Air Raid Shelter
- Charmy Down Airfield Battle HQ
- Chateau de la Vignole
- Chatham Dockyard Commissioner's House Ice House
- Chatham Southern Water Emergency Control Centre
- Chatton ROC Post
- Cheadle Regional War Room
- Cheam South West London Group Control
- Checkendon ROC Post
- Cheddar Caves
- Cheddington ROC Post
- Chedworth Airfield Battle HQ
- Chelm Chalk Mine
- Chelmsford Essex County Emergency Centre
- Chelsea Borough Control
- Cheltenham Emergency Centre
- Chelveston Airfield Battle HQ
- Chenies Rotor Radar Station
- Chepstow ROC Post
- Cheriton ROC Post
- Chernobyl Power Station
- Cherry Hinton ROC Post
- Cheslyn Hay ROC Post
- Chester Railway Control Centre
- Chetwynd Airfield Battle HQ
- Cheveley ROC Post
- Chichester a.k.a. Dell Quay ROC Post
- Chichester West Sussex County Emergency Centre
- Chiddingly ROC Post
- Chigwell ROC Post
- Chilbolton Airfield Battle HQ
- Childen Polden ROC Post
- Chilmark RGHQ
- Chilmark Quarry and RAF Ammunition Store
- Chiltern District Council Emergency Centre
- Chinley ROC Post
- Chippenham ROC Post
- Chipping Ongar ROC Post
- Chipping Warden ROC Post
- Chirnside ROC Post
- Chislehurst Caves
- Chislehurst South East London Group Control
- Chop Gate ROC Post
- Chorleywood ROC Post
- Chorlton-cum-Hardy ROC Post
- Christchurch Hampshire County Council and County Borough of Bournemouth Area Control
- Christchurch ROC Post
- Christow ROC Post
- Church Gresley ROC Post
- Church Lawford Airfield Battle HQ
- Church Stretton ROC Post
- Churchill (Cabinet) War Rooms
- Chwilog ROC Post
- Chyngton Bunker
- Château de Brézé
- City Defences and Gunpowder Store Gothenburg
- City Road Station
- Citybanan (Stockholm City Line)
- Civil Defence Control Centre Gravesend
- Clachan ROC Post
- Clacton ROC Post
- Clandon ROC Post
- Clapham Common Deep Shelter
- Clapham North Deep Shelter
- Clapham South Deep Shelter
- Clapton WW2 ARP Control
- Clarborough ROC Post
- Clare ROC Post
- Clarendon House School Air-Raid Shelters, Ramsgate
- Claudian Tuff Quarry
- Claudy ROC Post
- Claydon ROC Post
- Claygate War Office TBM Testing Ground
- Claypole ROC Post
- Clayton-le-Woods Service Reservoir
- Cleave Airfield Battle HQ
- Clevedon ROC Post
- Cley-next-the-Sea ROC Post
- Cliffe ROC Post
- Clifton ROC Post
- Clipston ROC Post
- Clogher ROC Post
- Cloghmills ROC Post
- Cloughton ROC Post
- Clova ROC Post
- Clows Top ROC Post
- Clun ROC Post
- Clutton ROC Post
- Clydach ROC Post
- Clyffe Pypard Airfield Battle HQ
- Coads Green ROC Post
- Coalhouse Fort
- Cochin Hospital Quarry
- Cockburnspath ROC Post
- Cockermouth ROC Post
- Cockshutt ROC Post
- Cogenhoe ROC Post
- Colchester ROC Group HQ
- Cold Ash ROC Post
- Cold Hesledon Rotor Radar Station
- Cold Overton ROC Post
- Cold War Heavy Anti-aircraft gun site, 330m and 220m north east of Halls Green Farm, Roydon - Epping Forest
- Coldblow Ace High Relay Station
- Coldstream ROC Post
- Coleby grange Airfield Battle HQ
- Coleraine ROC Post
- Colerton ROC Post
- Coleshill Replica Operational Base
- Coleshill Water Tunnels
- Colindale ROC Post
- Colinton Tunnel
- Collingbourne Ducis ROC Post
- Collingham ROC Post
- Coltishall ROC Post
- Combe Martin ROC Post
- Complex Włodarz, Project Riese
- Compton ROC Post
- Comrie ROC Post
- Condover Airfield Battle HQ
- Coningsby ROC Post
- Conisbrough AAOR
- Cononish Gold and Silver Mine
- Constantine ROC Post
- Convill ROC Post
- Cooden ROC Post
- Cookstown ROC Post
- Coombe Conduit
- Coombes ROC Post
- Coppermills Thames Water Control Centre Bunker
- Copythorne ROC Post
- Corby ROC Post
- Corpach Ice House
- Corsham Ammunition Depot and Standby Government Headquarters
- Cortachy ROC Post
- Corwen ROC Post
- Coswarth South West Water Emergency Control Centre
- Cotgrave ROC Post
- Cotherstone ROC Post
- Cottesmore Airfield Battle HQ
- Cottingham Yorkshire Water Emergency Control Centre
- Couriot Coal Mining Museum, St Etienne
- Courtaulds Factory Air Raid Shelters
- Coventry Cathedral Crypts
- Cowling ROC Post
- Cragiehall AAOR
- Craigiebarns Dundee ROC Group HQ
- Craigiehall WWII Gun Operations Room (demolished)
- Crail ROC Post
- Cranage Airfield Battle HQ
- Cranbrook ROC Post
- Cranfield Airfield Battle HQ
- Cranleigh ROC Post
- Craven Arms ROC Post
- Crawley Borough Emergency Centre
- Crawley ROC Post
- Crayford Air Raid Shelter
- Creetown ROC Post
- Cregneash Chain Home Low Radar Station
- Crescent Wood Tunnel
- Creswell Crags
- Crewe ROC Post
- Crewkerne ROC Post
- Crianlarich ROC Post
- Crick Canal Tunnel
- Crick ROC Post
- Cricklade Radio Site
- Cricklade Radio Station
- Cricklade ROC Post
- Criggion Radio
- Croes-Goch ROC Post
- Croft Airfield Battle HQ
- Croft ROC Post
- Cromarty House, Servants' Tunnel
- Cromarty ROC Post
- Cromer ROC Post
- Crosby on Eden Airfield Battle HQ
- Crossland Moor ROC Post
- Crosslaw Rotor Radar Station
- Crosswood ROC Post
- Croughton Airfield Battle HQ
- Crowborough RGHQ
- Crowborough ROC Post
- Crowfield ROC Post
- Crowland ROC Post
- Crowle ROC Post
- Crownhill Fort AAOR
- Crowthorne ROC Post
- Croyde ROC Post
- Croydon Whitgift School Air Raid Shelter
- Cruachan Power Station - The Hollow Mountain
- Cruden Bay ROC Post
- Crumlin Road Gaol Tunnel
- Crymmych ROC Post
- Crystal Gypsum Cave
- Crystal Palace 'Lead Mine'
- Crystal Palace Pneumatic Railway
- Crystal Palace Subway
- Crystal Palace Tunnel
- Cuckfield ROC Post
- Cuckmere Haven ROC Post
- Culford ROC Post
- Culgaith ROC Post
- Culham ROC Post
- Culmhead Airfield Battle HQ
- Culsh Earth House
- Cults Limestone Mines
- Cultybraggan RGHQ
- Culver Tunnel
- Cummertrees ROC Post
- Cupar ROC Post
- Curdworth ROC Post
- Cushendall ROC Post
- Cwmorthin Slate Quarry
- Cwmystwyth Lead Mines
- Dagenham Borough Control
- Dagenham WW2 Civil Defence Control Centre
- Dalavich ROC Post
- Dalcross Airfield Battle HQ
- Dale Airfield Battle HQ
- Dale ROC Post
- Dalkeith ROC Post
- Dallas ROC Post
- Dalmally ROC Post
- Dalmellington ROC Post
- Dalry ROC Post
- Dalston ROC Post
- Dalwhinnie ROC Post
- Dan-Yr-Ogof Caves
- Darenth Wood Dene Hole
- Dark Arch, Parlington Hall
- Darley ROC Post
- Darnley Mausoleum
- Dartford Emergency Centre
- Darton ROC Post
- Darvel ROC Post
- Daventry ROC Post
- De Keel Quarry
- Dean Hill Royal Naval Armaments Depot
- Debden Airfield Battle HQ
- Debenham ROC Post
- Decin Fluorite Mine
- Dee Water Tunnel
- Deepdale ROC Post
- Deepdene WW2 Southern Railway Traffic Control Centre
- Deerness ROC Post
- Delacroix Quarry
- Dent ROC Post
- Derby Airfield Battle HQ
- Dersingham ROC Post
- Desborough Airfield Battle HQ
- Detling Airfield Battle HQ
- Devizes ROC Post
- Die Klocke Ludwikowice Kłodzkie
- Digby Airfield Battle HQ
- Digulleville Radar Bunker
- Dingwall ROC Post
- Diss ROC Post
- Ditchling Auxiliary Units OB
- Ditchling ROC Post
- Ditton Priors ROC Post
- Ditton Priors Royal Navy Armament Depot
- Dobrošov Artillery Fort
- Docking ROC Post
- Dodge Hill Deep Shelter, Stockport
- Dodwell Hill (Whittington) Stone Quarries
- DOE Tunnels Dover
- Dolgellau ROC Post
- Domqueur Muches
- Domus Romane
- Doncaster Borough Control
- Donnington Thames Water Control Centre
- Dorchester ROC Post
- Dornie Gold Mine
- Dornoch ROC Post
- Dorrington ROC Post
- Douglas (IoM) ROC Post
- Douglas ROC Post
- Doune ROC Post
- Dover Castle AAOR (Casemate Level)
- Dover Castle Medical Dressing Station (Annexe Level)
- Dover Castle RSG (Dumpy Level)
- Dover Docks Underground Fuel Tanks
- Dover ROC Post
- Down Street Station
- Downderry ROC Post
- Downham Market Airfield Battle HQ
- Downham Market ROC Post
- Downpatrick ROC Post
- Drakelow WW2 Shadow Factory RSG and RGHQ
- Draperstown ROC Post
- Draycott Cross Colliery
- Drem Airfield Battle HQ
- Drewsteignton ROC Post
- Driffield ROC Post
- Drumadoon ROC Post
- Drumbo ROC Post
- Drummuir ROC Post
- Drumnadrochit ROC Post
- Drumoak ROC Post
- Drumquin ROC Post
- Dryslwyn ROC Post
- Duddington ROC Post
- Dudley Canal Tunnel
- Dulverton ROC Post
- Dulwich ROC Post
- Dumfries Airfield Battle HQ
- Dumfries and Galloway Council Emergency Headquarters
- Dumfries ROC Post
- Dumpy B Communications Bunker
- Dunbar ROC Post
- Dunbeath ROC Post
- Dundrod ROC Post
- Dundrum ROC Post
- Dungannon ROC Post
- Dungeness ROC Post
- Dungiven ROC Post
- Dunham-on-the-Hill Royal Ordnance Factory
- Dunham-on-Trent ROC Post
- Dunkeld ROC Post
- Dunkeswell Airfield Battle HQ
- Dunkeswell Battle Headquarters & Uniter Bunker
- Dunkirk Chain Home Radar Station
- Dunlop ROC Post
- Dunnet Head Chain Home Radar Station
- Dunning ROC Post
- Duns ROC Post
- Dunsfold Airfield Battle HQ
- Dunsop Bridge ROC Post
- Dunster ROC Post
- Dunsyre ROC Post
- Dunure ROC Post
- Dunvegan ROC Post
- Durham ROC Group HQ
- Durness ROC Post
- Dursley ROC Post
- Duston ROC Post
- Duxford Airfield Battle HQ
- Dymchurch ROC Post
- Dysart ROC Post
- Eaglesham ROC Post
- Earls Barton ROC Post
- Earls Colne Airfield Battle HQ
- Earls Colne ROC Post
- Easington ROC Post
- East Carlton ROC Post
- East Coanwood Colliery
- East Dereham Breckland District Emergency Centre
- East Dereham ROC Post
- East Fortune Airfield Battle HQ
- East Haddon ROC Post
- East Ham Borough Control
- East Ilsley ROC Post
- East Kilbride Western Zone Regional War Room
- East Kirkby ROC Post
- East Markham ROC Post
- East Pool Mine
- East Sheen Air Raid Shelter
- East Stour ROC Post
- Eastchurch Airfield Battle HQ
- Eastchurch ROC Post
- Easthampstead Park - Bracknell and East Berkshire (Sub) County Control
- Eastoft ROC Post
- Eastry Caves
- Eaton Socon ROC Post
- Ecclesfield/Hoyland ROC Post
- Echt ROC Post
- Edenbridge ROC Post
- Edge Hill and Waterloo Branch Railway
- Edge Hill ROC Post
- Edgware Junior School Air-Raid Shelter
- Edinburgh City Control
- Edmonton Borough Control Site 1
- Edmonton Borough Control Site 2
- Edwinstowe ROC Post
- Edzell ROC Post
- Egglescliffe ROC Post
- Egylsfach ROC Post
- Eidelstedter Weg Bunker, Hamburg
- Elephant (Elefanten) Civil Defence Command Centre
- Elgin Pinefields Area Control
- Elgin ROC Post
- Elie ROC Post
- Ellesmere Port Emergency Centre
- Ellington Colliery
- Ellington ROC Post
- Ellington School Air Raid Shelter
- Elloughton ROC Post
- Elmdon Airfield Battle HQ
- Elphin ROC Post
- Elstree ROC Post
- Eltham ROC Post
- Elvaston AAOR
- Ely East Cambridgeshire District Council Emergency Centre
- Embankment Station
- Embleton ROC Post
- Emmer Green ('Scout') Chalk Mine
- Empingham ROC Post
- Endon ROC Post
- Enfield ROC Post
- Enford ROC Post
- Enniskillen ROC Post
- Enstone ROC Post
- Eperlecques V2 Bunker
- Epworth ROC Post
- Erdington ROC Post
- Erith Underground Hospital
- Ervie ROC Post
- Erwood ROC Post
- Escrick Forward Filling Depot
- Eshott Airfield Battle HQ
- Eskdale ROC Post
- Eskdalemuir ROC Post
- Eston Grangetown Area Control
- Eston ROC Post
- Eton College Nuclear Shelter
- Etwall ROC Post
- Euston Underground Station
- Evershot ROC Post
- Evesham ROC Post
- Ewell House Tunnels
- Excelsior Tunnel
- Exeter Airfield Battle HQ
- Exeter Borough Control
- Exeter Underground Passages
- Exford ROC Post
- Exminster ROC Post
- Exmouth ROC Post
- Eyemouth ROC Post
- Eythorne ROC Post
- Faddiley ROC Post
- Fairlight ROC Post
- Fairlight Rotor Radar Station
- Fairlop Airfield Battle HQ
- Fakenham ROC Post
- Faldingworth Nuclear Bomb Store
- Falkenhagen Bunker
- Falkirk Canal Tunnel
- Falkirk Civil Defence Headquarters
- Falkland ROC Post
- Fan Bay Deep Shelter
- Faraid Head Rotor Radar Station
- Farleigh Down Tunnel
- Farncombe Cold Store
- Farnham ROC Post
- Farningham ROC Post
- Farnsfield ROC Post
- Farway Common ROC Post
- Fearn Airfield Battle HQ
- Fearn Airfield Operations Block
- Fearn ROC Post
- Felixtowe ROC Post
- Feltwell Airfield Battle HQ
- Femore Fort
- Fenham Hill ROC Post
- Feniton ROC Post
- Fern Cave Matlock
- Fern ROC Post
- Fernhurst ROC Post
- Feughside ROC Post
- Fforest Fach ROC Post
- Filescamps (Le Hameau) Muches
- Filton Airfield Battle HQ
- Finchingfield ROC Post
- Finchley Borough Control
- Findhorn ROC Post
- Findo Gask Airfield Battle HQ
- Finmere Airfield Battle HQ
- Finsbury Borough Control
- Finsbury Park Reservoir
- Firle Auxiliary Units OB
- Fishguard ROC Post
- Fiskerton Airfield Battle HQ
- Fiskerton Lincoln ROC Group HQ
- Five Barrows ROC Post
- Fivemiletown ROC Post
- Flamborough ROC Post
- Fleckney ROC Post
- Fleetwood ROC Post
- Fleggburgh ROC Post
- Flookburgh ROC Post
- Folkestone (1st site) ROC Post
- Folkestone (2nd site) ROC Post
- Fontmell Magna ROC Post
- Fordham ROC Post
- Fordingbridge ROC Post
- Forfar ROC Post
- Formby ROC Post
- Fort Amherst
- Fort Augustus ROC Post
- Fort Bridgewoods AAOR
- Fort de l'Aisne
- Fort Douaumont
- Fort Driant
- Fort du Roule
- Fort Eben-Emael
- Fort Fareham AAOR
- Fort Fareham Borough Emergency Centre
- Fort Guentrange
- Fort Koenigsmacker
- Fort Paull
- Fort Pitt
- Fort Schoenenbourg, Maginot Line
- Fort Southwick
- Fort Southwick NATO Communications Centre
- Fort Srebrna Góra
- Fort Vaux
- Fort Widley
- Fort William ROC Post
- Forth ROC Post
- Forton ROC Post
- Fortrose ROC Post
- Fosdyke ROC Post
- Foulness ROC Post
- Foulridge Canal Tunnel
- Fowlmere Airfield Battle HQ
- Fownhope ROC Post
- Foxenden Quarry
- Foxwarren Air Raid Shelter
- Framfield ROC Post
- Framingham Earl ROC Post
- Frankley ROC Post
- Frant ROC Post
- Fraserburgh Airfield Battle HQ
- Freethorpe ROC Post
- Freshwater ROC Post
- Friern Barnet Borough Control
- Friockheim ROC Post
- Friskney ROC Post
- Frodsham AAOR
- Frome ROC Post
- Froxfield Green ROC Post
- Fulford (1st site) ROC Post
- Fulford (2nd site) ROC Post
- Fulstow ROC Post
- Fylingdales Long Range Radar Station
- Fyvie ROC Post
- Gadow Soviet Air Force Bunkers
- Gailes Rotor Radar Station
- Gainsborough Bridge Air-Raid Shelter
- Gainsborough ROC Post
- Gairloch AAOR
- Gairloch ROC Post
- Galashiels ROC Post
- Gants Hill Subway Shelter
- Gara Bridge ROC Post
- Garboldisham ROC Post
- Gardenstown ROC Post
- Gare de l'Est Control Bunker
- Garelochead ROC Post
- Gargrave ROC Post
- Garlieston ROC Post
- Garvald ROC Post
- Garve ROC Post
- Garzau NVA Computer Centre
- Gatehouse of Fleet ROC Post
- Gatti's Ice House - London Canal Museum
- Gatwick Airport Passenger Subway
- Gauldry ROC Post
- Gaydon Nuclear Bomb Store
- Geevor Tin Mine
- George and Charlotte Copper Mine
- George Vaults Rochester
- German Air Raid Shelter Breslau 1
- German Air Raid Shelter Breslau 2
- German Air Raid Shelter Breslau 3
- German Air Raid Shelters
- Gesundbrunnen Air-Raid Shelter
- Giants Cave
- Gibraltar Europa Point Rock Radio Station
- Gilberdyke ROC Post
- Gilbertfield ROC Post
- Gillingham Borough Control
- Gilmerton Cove
- Gilsland ROC Post
- Girvan ROC Post
- GKN Screws & Fasterners Shadow Factory/Tunnels, Birmingham
- Glamis ROC Post
- Glasgow ROC Post
- Glastonbury ROC Post
- Gleision Coal Mine
- Glenarm ROC Post
- Glenbarr ROC Post
- Glenferness ROC Post
- Glenfinnan ROC Post
- Glenisla ROC Post
- Glossop ROC Post
- Gloucestershire Standby Headquarters
- Gnosall ROC Post
- Goathland ROC Post
- Godalming Waverley District Council Emergency Centre
- Godstone Hill Quarry
- Godstone Private Fallout Shelter
- Godstone Road Air-Raid Shelter Kenley
- Godwin Battery
- Goldsborough Cold Store
- Goldsborough Rotor Radar Station
- Goldthorpe ROC Post
- Golgotha Tunnel
- Gollachy Ice House, Portgordon
- Good Easter ROC Post
- Goodge St Deep Shelter
- Goodluck Lead Mine
- Goodwood Auxiliary Units OB
- Gordon ROC Post
- Gorebridge ROC Post
- Gorthleck ROC Post
- Gosforth AAOR
- Gosport Borough Control
- Gosport Borough Council Nuclear Bunker
- Gourock ROC Post
- Goxhill Airfield Battle HQ
- Grafton Underwood Airfield Battle HQ
- Grain Fort
- Grain Tower
- Grainger Market Air Raid Shelter
- Grange Cavern WW2 RAF Bomb Store
- Grange ROC Post
- Grantham ROC Post
- Grantown-on-Spey ROC Post
- Grantshouse ROC Post
- Grasmere ROC Post
- Grassington Moor Lead Mines
- Grassington ROC Post
- Gratley ROC Post
- Great Ashfield Airfield Battle HQ
- Great Ayton ROC Post
- Great Baddow ROC Post
- Great Bedwyn ROC Post
- Great Bolas ROC Post
- Great Crosby ROC Post
- Great Dunmow ROC Post
- Great Hockham ROC Post
- Great Masson Cavern
- Great Missenden ROC Post
- Great North Road Tunnel
- Great Offley ROC Post
- Great Orme Mines
- Great Rutland Cavern / Nestor Mine
- Great Sampford Airfield Battle HQ
- Great Shefford ROC Post
- Great Siege Tunnels
- Great Wakering ROC Post
- Great Whittington ROC Post
- Grebe Swallet Mine
- Green Park Underground Station
- Greenfield ROC Post
- Greenhithe ROC Post
- Greenhow Hill ROC Post
- Greenwich Borough Control
- Greenwich Foot Tunnel
- Greg Ness ROC Post
- Gressenhall ROC Post
- Greys Court Ice House
- Greystoke ROC Post
- Greywell Tunnel Basingstoke Canal
- Grimebridge Colliery
- Grimes Graves
- Groomsport ROC Post
- Gros Ouvrage Cap Martin, Maginot Line
- Gros Ouvrage Flaut, Maginot Line
- Gros Ouvrage Hackenberg, Maginot Line
- Gros Ouvrage Hochwald Maginot Line
- Gros Ouvrage L'Agaisen, Maginot Line
- Gros Ouvrage Mont des Welches
- Gros Ouvrage Monte Grosso, Maginot Line
- Gros Ouvrage Roquebrune, Maginot Line
- Gros Ouvrage Sainte-Agnès, Maginot Line
- Grove Airfield Battle HQ
- Grove Colliery
- Grove Tunnel
- Grundisburgh ROC Post
- Guardian Telephone Exchange
- Guernsey Civil Defence Headquarters
- Guernsey St Martin Monitoring Post
- Guernsey Torteval Monitoring Post
- Guernsey Vale Monitoring Post
- Guildford Medieval Synagogue
- Guildford Stoughton Barracks SRHQ
- Guilford Colliery
- Guiseley ROC Post
- Guist ROC Post
- GWR Telephone Exchange, Newport
- Gävle Coastal Artillery Fort
- Habarcq Stone Quarry and Shelter
- Hack Green Rotor Radar Station and RGHQ
- Hackney WW2 ARP Control and Post War Borough Control
- Hackthorn ROC Post
- Hadleigh ROC Post
- Hadleigh WW2 Anti Aircraft Ammunition Magazine and NATO Ammunition Depot
- Hagley Hall Grotto
- Hahn Air Base
- Haig Colliery, Whitehaven
- Hailey ROC Post
- Halberstadt Tunnel Complex
- Halesworth ROC Post
- Halifax County Borough Control
- Halkirk ROC Post
- Hallen ROC Post
- Halliggye Fogou
- Ham House Ice House
- Hamble Airfield Battle HQ
- Hambledon ROC Post
- Hammarkullen Tram Stop, Gothenburg
- Hamstreet ROC Post
- Hanbury Hall Ice House
- Handley ROC Post
- Hanička Artillery Fort
- Hanover Chalk Mine
- Harbottle ROC Post
- Harbury ROC Post
- Harby ROC Post
- Hardwick Airfield Battle HQ
- Harecastle Tunnel, Trent and Mersey Canal
- Harewood End ROC Post
- Harewood ROC Post
- Harford Hills Chalk Mine
- Haringey Borough Control
- Harlaston ROC Post
- Harleston ROC Post
- Harnekop Nuclear Bunker
- Harold Wood ROC Post
- Harpenden Air Raid Shelters
- Harris ROC Post
- Harrogate Civil Defence Centre
- Harrowbeer(1) Airfield Battle HQ
- Harrowbeer(2) Airfield Battle HQ
- Harston ROC Post
- Hart Heugh ROC Post
- Hartburn ROC Post
- Hartest ROC Post
- Hartfield ROC Post
- Hartington ROC Post
- Hartland Point Rotor Radar Station
- Hartlepool ROC Post
- Hartmannswillerkopf Trench System
- Harwich RDF Tower
- Harwich RNXS Emergency Port Control
- Haseley Knob ROC Post
- Hastings Borough Council Control
- Hastings Hill ROC Post
- Hastings West Hill Cliff Railway
- Hatch Beauchamp ROC Post
- Hatfield Broad Oak ROC Post
- Hatfield Peverel ROC Post
- Hatherleigh ROC Post
- Havant ROC Post
- Haverfordwest ROC Post
- Haverhill ROC Post
- Havstoudd Battery, Hemsö
- Hawarden Airfield Battle HQ
- Hawes ROC Post
- Hawkinge(1) Airfield Battle HQ
- Hawkinge(2) Airfield Battle HQ
- Hawkinge(3) Airfield Battle HQ
- Hawkshead ROC Post
- Hawkstone Park
- Hay ROC Post
- Hay's Level
- Haydon Bridge ROC Post
- Hayes Sub Area Control
- Hayling Island ROC Post
- Hayscastle Cross Chain Home Radar Station
- Hayward's Heath Railway Tunnel & Folly Hill Cutting
- Headcorn ROC Post
- Headley ROC Post
- Heckeshorn Luftwaffe and Cold War Hospital Bunker
- Heckington ROC Post
- Heckmondwike ROC Post
- Heiligengeistfeld Flak Tower, Hamburg
- Heligoland
- Hellesdon ROC Post
- Hellfire Caves
- Helmsley ROC Post
- Helsby ROC Post
- Helston ROC Post
- Hemel Hempstead Dacorum Borough Council Emergency Centre
- Henfield ROC Post
- Henham ROC Post
- Henley WW2 Shadow Factory and Armed Forces HQ
- Henley-in-Arden ROC Post
- Herne Bay ROC Post
- Herriard ROC Post
- Herstmonceux ROC Post
- Hertford ROC Post
- Hertford Sovereign House SRHQ
- Hexham Abbey Crypt
- Hexham Cold Store and RGHQ
- Heysham ROC Post
- Hibaldstowe Airfield Battle HQ
- Hiermont Muches
- High Bentham ROC Post
- High Bickington ROC Post
- High Elms Ice House
- High Ercall Airfield Battle HQ
- Highgate Archway 'Tunnel'
- Highgate Cemetery
- Highgate Railway Tunnels
- Highworth ROC Post
- Hill Head ROC Post
- Hill ROC Post
- Hillingdon Borough Control
- Hillsborough ROC Post
- Hinderwell ROC Post
- Hindhead Road Tunnel
- Hingham ROC Post
- Hinton in the Hedges Airfield Battle HQ
- Hirwaun ROC Post
- Hixon Airfield Battle HQ
- HMS Forward
- HMS Tern / RNAS Twatt
- HMS Wildfire
- Hoar Cross ROC Post
- Hogs Back ROC Post
- Holbeach ROC Post
- Holbeton ROC Post
- Hole Park Ice House
- Holford ROC Post
- Hollingbourne Zero Station (Auxiliary Units)
- Hollybush Quarry, Corsham
- Holman's Test Mine
- Holme Bank Chert Mine
- Holme-on-Spalding Moor ROC Post
- Holmfirth ROC Post
- Holmpton Rotor Radar Station
- Holmsley South Airfield Battle HQ
- Holmwood ROC Post
- Holsworthy ROC Post
- Holy Austin Rock Houses, Kinver Edge
- Holy Trinity Church Crypt
- Holywell ROC Post
- Holywood ROC Post
- Honecker Bunker 5001 (Pearl)
- Honeybourne Airfield Battle HQ
- Honingham ROC Post
- Honington (Lincs) ROC Post
- Honington ROC Post
- Honister Slate Mine
- Hoo Fort
- Hoo ROC Post
- Hooton Park Airfield Battle HQ
- Hope Cove Rotor Radar Station and RGHQ
- Hope ROC Post
- Hopewell Colliery
- Hopton ROC Post
- Hopton Rotor Radar Station
- Horden ROC Post
- Horns Cross ROC Post
- Hornsea ROC Post
- Horsham District Council Emergency Centre
- Horsham ROC Group HQ
- Horsham ROC Post
- Horsmonden ROC Post
- Horton-in-Ribblesdale ROC Post
- Hosey Common Stone Quarry
- Hougham Battery Plotting Room
- Hounslow ROC Post
- Hovingham ROC Post
- Howden ROC Post
- Hoxa Head & Balfour Batteries
- Hucknall Airfield Battle HQ
- Hucknall ROC Post
- Huddersfield Civil Defence Control Centre
- Hughenden Manor Ice House
- Hulland ROC Post
- Humberstone ROC Post
- Humbie ROC Post
- Humboldthain Flak Tower
- Hunmanby Airfield Battle HQ
- Hunmanby ROC Post
- Hunsdon Airfield Battle HQ
- Hunslet ROC Post
- Hunstanton ROC Post
- Huntly ROC Post
- Hurka Fort
- Hurstbourne Tarrant ROC Post
- Hurstpierpoint Auxiliary Units OB
- Hush-Hush
- Huskisson Goods Tunnel
- Hutton Cranswick Airfield Battle HQ
- Hyde Park Corner Underground Station
- Hyde ROC Post
- Ibsley Airfield Battle HQ
- Ickleton ROC Post
- Iden Auxiliary Units OB
- Inchcolm Battery Access Tunnel
- Inchindown Underground Oil Tanks
- Ingleborough Cave
- Ingoldsby ROC Post
- Inkberrow ROC Post
- Inkerman Quarry
- Inverallochy ROC Post
- Inveraray ROC Post
- Inverbervie ROC Post
- Inverbervie Rotor Radar Station
- Invergarry Ice House
- Invergarry ROC Post
- Invergordon ROC Post
- Inverkeilor ROC Post
- Inverkeithing ROC Post
- Inverkip AAOR
- Inverness Raigmore Highland Emergency Centre
- Inverness ROC HQ
- Inverness ROC Post
- Inverurie Gordon District Council Emergency Centre
- Ipstones ROC Post
- Ipswich USW Autovon Telephone Exchange
- Irvinestown ROC Post
- Isle of Man Radar
- Isleham ROC Post
- Jack Cade's Cavern
- Jalta Hotel Prague
- Janska Underground Factory and Fuel Store
- Jedburgh ROC Post
- Jerretts Pass ROC Post
- Jersey BBC Bunker Les Platons
- Jersey Civil Emergency Centre
- Jersey Gouray Monitoring Post
- Jersey Munitions Store Ho1
- Jersey Rations Store Ho2
- Jersey St Ouens Church Monitoring Post
- Jersey War Tunnels (Ho8)
- Jesmond Dene ARP Headquarters
- Jesmond Old Cemetery Catacombs
- Johannes Nuclear Shelter
- John O'Groats ROC Post
- Joppa ROC Post
- Josefov Fortress
- Jönköping Vaults and Civil Defence Bunker
- Jüterbog Airfield
- Kanne NATO Joint Operations Centre
- Karl-Stützel-Platz Air-Raid Shelter
- Katarinaberget Nuclear Shelter
- Kaufmann Bunker, Hamburg
- Keevil Airfield Battle HQ
- Keighley Air Raid Shelter
- Keighley ROC Post
- Kelly Mine
- Kelsey Manor Ice House
- Kelso ROC Post
- Kelty ROC Post
- Kelvedon Hatch Rotor SOC and RGHQ
- Kelvedon ROC Post
- Kemble ROC Post
- Kendal ROC Post
- Kenley Airfield Battle HQ
- Kennethmont ROC Post
- Kensal Green Cemetery and Catacombs
- Kent Mining Museum
- Kentford ROC Post
- Kentisbeare ROC Post
- Kenton Bar 13 Group Fighter Command Headquarters and Regional War Room
- Kenton ROC Post
- Kents Cavern
- Kesh ROC Post
- Kessingland ROC Post
- Kettering ROC Post
- Kew Palace Ice House
- Keyingham ROC Post
- Keynsham ROC Post
- Kidlington Airfield Battle HQ
- Kidlington ROC Post
- Kidwelly ROC Post
- Kielder ROC Post
- Kilchattan Bay ROC Post
- Kilchiaran Chain Home Low Radar Station
- Kilchiaran Rotor Radar Station
- Kildonan ROC Post
- Kildrummy ROC Post
- Kilkeel ROC Post
- Kilkhampton ROC Post
- Killearn ROC Post
- Killhope Lead Mining Museum
- Killin ROC Post
- Kilmarnock ROC Post
- Kilnsea ROC Post
- Kilrea ROC Post
- Kilskerry ROC Post
- Kilwinning ROC Post
- Kimbolton Airfield Battle HQ
- Kimpton ROC Post
- Kinbrace ROC Post
- King Edward Mine Museum
- King Edward VII School Air-Raid Shelter, Sheffield
- King William Street Station
- King's Lynn ROC Post
- Kinghorn ROC Post
- Kings Cliffe(1) Airfield Battle HQ
- Kings Cliffe(2) Airfield Battle HQ
- Kings Langley ROC Post
- Kings Lynn Joint Norfolk County Standby and West Norfolk District Emergency Centre
- Kings Worthy ROC Post
- Kingsclere Admiralty Gun Testing Site
- Kingsclere ROC Post
- Kingsclere Seismic Monitoring Station
- Kingsdown ROC Post
- Kingsgate ROC Post
- Kingston Chambers, 17 Princes Dock Street, Hull
- Kingston St. Mary ROC Post
- Kingsway Telephone Exchange
- Kingsway Tram Subway
- Kingswood Ice House and Grotto
- Kingswood Railway Tunnel
- Kingussie ROC Post
- Kinloch Rannoch ROC Post
- Kinlochewe ROC Post
- Kinloss Airfield Battle HQ
- Kinnel Airfield Battle HQ
- Kintore ROC Post
- Kintyre Civil Defence Training Centre
- Kippen ROC Post
- Kirby Hill ROC Post
- Kirby Moorside ROC Post
- Kirkbean ROC Post
- Kirkbride ROC Post
- Kirkby Lonsdale ROC Post
- Kirkby Royal Ordnance Factory
- Kirkby Stephen ROC Post
- Kirkcowan ROC Post
- Kirkcudbright ROC Post
- Kirkdale Tunnels
- Kirkgunzeon ROC Post
- Kirkintilloch ROC Post
- Kirklevington Hall AAOR
- Kirkliston ROC Post
- Kirkmichael ROC Post
- Kirknewton Regional War Room and Scottish Eastern Zone HQ
- Kirkwall ROC Post
- Kirkwall Sector Operations Room and Gun Control Room (The Black Building)
- Kirmington Airfield Battle HQ
- Kirtlebridge ROC Post
- Kitley Cave
- Klodzko Cellars
- Knaresborough ROC Post
- Knighton ROC Post
- Knockholt ROC Post
- Knole House Ice Well
- Knutsford ROC Post
- Koelebosch Quarry
- Koopmann Ice Cellar, Hamburg
- Korbelitz Stasi Bunker
- Krzemionki Prehistoric Flint Mines
- Książ Castle (Zamek Książ)
- Kutna Hora Silver Mine
- Kvarnberget Nuclear Shelter Gothenburg
- Kyiv Metro
- Kyle of Lochalsh (1st site) ROC Post
- Kyle of Lochalsh (2nd site) ROC Post
- La Chaussée-Tirancourt Chalk Mine
- La Coupole
- La Herlière 'Lion' Quarry
- La Hougue Bie Command Bunker
- La Hougue Bie Neolithic Passage Grave
- La Malogne Phosphate Mine
- La Mare Mill Resistance Nest , Jersey
- Lacroixberg Stone Quarry
- Lady Victoria Colliery - National Mining Museum
- Lairg ROC Post
- Lake Nemi Drain
- Lakenheath ROC Post
- Lambeth Council Emergency Centre
- Lampeter ROC Post
- Lamphey ROC Post
- Lanaye Eben-Emael Tunnel
- Lancashire County Emergency Centre
- Lancing ROC Post
- Landaff Court WW2 Control Cardiff
- Landguard AAOR
- Landsort Fort
- Langdon Battery
- Langham Airfield Battle HQ
- Langham ROC Post
- Langholm ROC Post
- Langport ROC Post
- Langtoft ROC Post
- Langtoft Rotor Radar Station
- Lansdown AAOR and Bristol ROC Group HQ
- Lapal Canal Tunnel
- Larne ROC Post
- Latchington ROC Post
- Latheron ROC Post
- Lauder ROC Post
- Laugharne ROC Post
- Launceston ROC Post
- Laurencekirk ROC Post
- Lavenham ROC Post
- Lawford Heath Coventry ROC Group HQ
- Laye Tunnel
- Le Quellay Refuge
- Lea ROC Post
- Lee Ice House
- Leeds Corporation Utilty Subways, York Street
- Leeds Regional War Room
- Leicester Severn Trent Water Emergency Control Centre
- Leigh ROC Post
- Leighterton ROC Post
- Leistikowstrasse KGB Prison
- Lenham ROC Post
- Leominster 'Arkwright Court bunker'
- Leominster ROC Post
- Lerwick ROC Post
- Les Caves du Roi, Sèvres
- Les Sources du Nord (Northern Springs)
- Leslie ROC Post
- Lesmahagow ROC Post
- Letchworth ROC Post
- Letham ROC Post
- Letterston ROC Post
- Levant Mine
- Leven ROC Post
- Lewes ROC Post
- Lexden ROC Post
- Leyburn ROC Post
- Leytonstone - Gants Hill Underground Factory
- Lezennes Stone Quarry
- Liddesdale ROC Post
- Lille Metro
- Lilliesleaf ROC Post
- Limavady ROC Post
- Limpsfield School Air Raid Shelters
- Lincolnshire County Emergency Centre
- Lindholme ROC Post
- Linton (Cambs) ROC Post
- Linton ROC Post
- Lintrahen ROC Post
- Lippitts Hill AAOR
- Lisburn AAOR and ROC Group HQ
- Liskeard ROC Post
- Lisnaskea ROC Post
- Little Heath Forward Filling Depot
- Little Horwood Airfield Battle HQ
- Little Snoring Airfield Battle HQ
- Little Sodbury ROC Post
- Little Steeping ROC Post
- Little Tunnel Basingstoke Canal
- Little Waltham ROC Post
- Littlehampton ROC Post
- Littleport ROC Post
- Littlewoods Air Raid Shelter
- Liverpool BT Deep Level Tunnels
- Liverpool Edge Hill Cutting
- Liverpool Mill Bank Sub Control
- Liverpool Overhead Railway
- Liverpool Walker Gallery Merseyside County Main Emergency Centre 1st Site
- Llananno ROC Post
- Llanbedr ROC Post
- Llanbedr(1) Airfield Battle HQ
- Llanbedr(2) Airfield Battle HQ
- Llanberis Bomb Store
- Llanboidy ROC Post
- Llanbrynmair ROC Post
- Llandovery ROC Post
- Llandow Airfield Battle HQ
- Llandrindod Wells ROC Post
- Llandudno ROC Post
- Llandwrog Airfield Battle HQ
- Llandyssul ROC Post
- Llanfaethlu ROC Post
- Llanfair Caereinion ROC Post
- Llanfair Talhaiarn ROC Post
- Llanfairfechan ROC Post
- Llanfyllin ROC Post
- Llangadfan ROC Post
- Llangammarch Wells ROC Post
- Llangefni ROC Post
- Llangollen ROC Post
- Llanidloes ROC Post
- Llanion Barracks AAOR
- Llanishen ROC Post
- Llanon ROC Post
- Llanrhaiadr ROC Post
- Llanrwst ROC Post
- Llantilio Crosseney ROC Post
- Llantwit Major ROC Post
- Llanuwchllyn ROC Post
- Llanwyddyn ROC Post
- Llanymynech Limeworks Heritage Area
- Llanymynech ROC Post
- Llwynypia Rhondda Cynon Taff Joint Emergency Centre
- Llysfaen ROC Post
- Llywernog Mine - Silver Mountain Experience
- Lochaber Geopark
- Lochaline ROC Post
- Lochaline Silica Sand Mine
- Lochboisdale ROC Post
- Lochcarron ROC Post
- Lochearnhead ROC Post
- Lochgilphead ROC Post
- Lochmaddy ROC Post
- Lochnell Mine - Museum of Lead Mining
- Lockerbie ROC Post
- Lockerley Green ROC Post
- Lockton ROC Post
- Loddon ROC Post
- Loftus ROC Post
- London Road (Cliffdale) Air-Raid Shelter
- London Sewers
- London Utility Subways
- Londonderry ROC Post
- Long Ashton ROC Post
- Long Compton ROC Post
- Long Marston Airfield Battle HQ
- Long Stratton ROC Post
- Long Sutton ROC Post
- Longbridge Underground Factory and Air-Raid Shelters
- Longdown Lane Air-Raid Shelter
- Longfleet Air Raid Shelter
- Longformacus ROC Post
- Longhorsley ROC Post
- Longhoughton ROC Post
- Longparish ROC Post
- Longridge ROC Post
- Longton (Lancs) ROC Post
- Longton ROC Post
- Longworth ROC Post
- Lords Bridge Air Ammunition Park
- Lords Bridge Forward Filling Depot
- Lords Railway Tunnels
- Lossiemouth Airfield Battle HQ
- Loughborough Cold Store and RGHQ
- Louth ROC Post
- Lowestoft ROC Post
- Lowestoft Sub Control
- Loxley Brickworks
- Ludlow ROC Post
- Lullingstone Castle Ice House
- Lulsgate Bottom Airfield Battle HQ
- Lurgan ROC Post
- Luton County Borough Control
- Lutterworth ROC Post
- Luxembourg Nuclear Shelter
- Lydbury North ROC Post
- Lydden Spout Battery
- Lydeard St. Lawrence ROC Post
- Lydford ROC Post
- Lyme Regis Thistloe Hill Tunnel
- Lyminge ROC Post
- Lyndhurst ROC Post
- Lyndon Green BT Repeater
- Lynton ROC Post
- Lyonshall ROC Post
- Lytham ROC Post
- Maastricht Casemates
- Mablethorpe ROC Post
- Macclesfield ROC Post
- Macduff ROC Post
- Machrihanish ROC Post
- Machynlleth ROC Post
- Madley Airfield Battle HQ
- Madron ROC Post
- Maenclochog ROC Post
- Maesteg ROC Post
- Maginot Line Gordolon Gros Ouvrage
- Maginot Line La Barbonnet Gros Ouvrage
- Maginot Line Plan Caval Gros Ouvrage
- Maginot Line Rochonvillers Gros Ouvrage and Nuclear Command Centre
- Maidstone ROC Group HQ
- Maidstone Springfields Kent County Emergency Centre
- Mailbox Tunnel
- Maison du Fontainier
- Malborough ROC Post
- Maldon District Council Emergency Centre
- Maldon ROC Post
- Mallaig ROC Post
- Malmesbury ROC Post
- Malpas ROC Post
- Malton ROC Post
- Manaton ROC Post
- Manchester and Salford Junction Canal
- Manchester Co-op Tunnels
- Manchester Corporation Main Control
- Manchester Science and Industry Museum
- Manchester Victoria Arches
- Manea ROC Post
- Mangup Kale Fortress
- Manningtree ROC Post
- Manor Lodge School Air-Raid Shelter, Sheffield
- Manston Airfield Battle HQ
- Marazion ROC Post
- Marble Arch Caves
- March ROC Post
- Marchwood ROC Post
- Mare's Hill Sand Mine, Pulborough
- Margam Chain Home Low Radar Station
- Margate Shell Grotto
- Marham Airfield Battle HQ
- Mariaberget Nuclear Shelter
- Marianglas ROC Post
- Marienthal West German Government Bunker
- Market Deeping ROC Post
- Market Drayton ROC Post
- Market Harbrough Airfield Battle HQ
- Market Rasen ROC Post
- Market Weighton ROC Post
- Markfield ROC Post
- Markyate Street ROC Post
- Marl Cold Store (Llandudno Junction)
- Marlow ROC Post
- Marshfield ROC Post
- Marston Magna ROC Post
- Martham ROC Post
- Martlesham Heath Airfield Battle HQ
- Mary King's Close
- Maxim Gorky 1 Naval Battery
- Medstead ROC Post
- Meikleour ROC Post
- Meir Airfield Battle HQ
- Melbourne ROC Post
- Melbourne Street Tramway Generating Station - Manors Power Station
- Mellor ROC Post
- Melton Constable ROC Post
- Melton Mowbray ROC Post
- Melvich ROC Post
- Mere ROC Post
- Meriden ROC Post
- Merkland Street Station
- Merstham AAOR
- Merston Airfield Battle HQ
- Merthyr Tydfil ROC Post
- Mesnil-Domqueur Muches
- Methlick ROC Post
- Methven ROC Post
- Methwold Airfield Battle HQ
- Metropolitan Water Board Air Raid Shelter
- Mevagissey ROC Post
- Micheldever RAF Reserve Fuel Depot
- Middlesex County Control
- Middlesmoor ROC Post
- Middleton ROC Post
- Middleton St. George(1) Airfield Battle HQ
- Middleton St. George(2) Airfield Battle HQ
- Middleton Stoney ROC Post
- Middleton-on-the-Wolds ROC Post
- Middlewich ROC Post
- Midhurst ROC Post
- Milford Haven Aviation Fuel Tanks
- Milford ROC Post
- Mill Hill North West London Group Control
- Millbrook ROC Post
- Millennium Seed Bank
- Millfield ROC Post
- Millom ROC Post
- Milltown Airfield Battle HQ
- Milnathort ROC Post
- Milngavie ROC Post
- Milnthorpe ROC Post
- Milwr Tunnel
- Minard ROC Post
- Minehead ROC Post
- Minllyn Slate Quarry
- Minster ROC Post
- Minsterley ROC Post
- Mistley AAOR
- Mitchell ROC Post
- Mithraeum of the Circus Maximus
- Modbury ROC Post
- Mold Clwyd County Standby Emergency Centre
- Mold ROC Post
- Monceau Metro Station
- Moniaive ROC Post
- Monks Ferry and Woodside Tunnels
- Monks Park Corsham
- Monkton Farleigh Ammunition Depot
- Monreuil-sur-Mer German Barracks
- Montfode Oil Storage Tanks
- Montgomery ROC Post
- Montreuil sur Mer Citadel
- Montrose(1) Airfield Battle HQ
- Montrose(2) Airfield Battle HQ
- Moorgate Station
- Morebattle ROC Post
- Moretonhampstead ROC Post
- Mormond Hill Radio Station
- Mortlake ROC Post
- Mother Shiptons Cave
- Mottisfont Abbey Ice Well
- Moulton Chapel ROC Post
- Mount Farm Airfield Battle HQ
- Mount Pleasant (Combe Down) Quarry, Bath
- Mount Wise Plymouth Maritime HQ
- Mountain Ash ROC Post
- Much Hadham ROC Post
- Much Wenlock ROC Post
- Muckhart ROC Post
- Muirkirk ROC Post
- Mullard Radio Astronomy Observatory
- Mundesley ROC Post
- Mundford ROC Post
- Munich Führerbau Shelter
- Munich Station Shelters
- Murdoch's Cave
- Murlough Bay Rotor Radar Station
- Museum of the Scottish Shale Oil Industry
- Mussolini Air-Raid Shelters, Villa Torlonia
- Mynydd Parys (Parys Mountain)
- Mytholmroyd Marshalling Yard Air-Raid Shelter
- Nairn ROC Post
- Namur Citadel
- Nanpean ROC Post
- Nantglyn ROC Post
- Napton-on-the-Hill ROC Post
- Narberth ROC Post
- Narborough ROC Post
- National Coal Mining Museum for England
- National Library of Wales - ARP Tunnel
- Navenby ROC Post
- Nazeing ROC Post
- Nefyn ROC Post
- Nenthead Mines
- Nesscliff ROC Post
- Neston ROC Post
- Netheravon Airfield Battle HQ
- Netherbutton Chain Home Radar Station
- Nevill Street, Southport
- New Brighton Palace Vaults
- New Buckenham ROC Post
- New Cumnock ROC Post
- New Deer ROC Post
- New Luce ROC Post
- New Malden ROC Post
- New Mills/New Oakley ROC Post
- New Milton ROC Post
- New Radnor ROC Post
- Newark ROC Post
- Newbigging ROC Post
- Newbold Tunnel Oxford Canal
- Newborough ROC Post
- Newburgh (Fife) ROC Post
- Newburgh ROC Post
- Newbury ROC Post
- Newcastle Emlyn ROC Post
- Newhaven Fort
- Newhaven ROC Post
- Newick ROC Post
- Newport (1st site) ROC Post
- Newport (2nd site) ROC Post
- Newport (Dyfed) ROC Post
- Newport ROC Post
- Newquay (Dyfed) ROC Post
- Newquay ROC Post
- Newton Abbott ROC Post
- Newton Orange Yeoman Tactical Control Radar
- Newton Stewart ROC Post
- Newtown ROC Post
- Newtownards ROC Post
- Newtownstewart ROC Post
- Newtyle ROC Post
- Ninfield ROC Post
- Niton ROC Post
- Nordhausen V2 Factory and Dora Concentration Camp
- Norham-on-Tweed ROC Post
- North Berwick ROC Post
- North Bristol Relief Sewer
- North Cerney ROC Post
- North End Underground Station
- North Kelsey ROC Post
- North Luffenham Airfield Battle HQ
- North Somercotes ROC Post
- North Stainley ROC Post
- North Walsham ROC Post
- North Weald Airfield Battle HQ
- North Weald Mobilisation Centre
- North Weald Ongar Radio
- Northallerton ROC Post
- Northern St Pietersberg Quarry and Vault
- Northfield Aberdeen ROC Group HQ
- Northfield Equipment Ammunition Magazine
- Northfleet Civil Defence Control
- Northfleet Kilns
- Northiam ROC Post
- Northleach ROC Post
- Northolt ROC Post
- Northolt Sub Control
- Northwich ROC Post
- Norwich Broadland District Council Emergency Centre
- Norwich County Emergency Headquarters
- Norwich ROC Group HQ
- Nottingham City Civil Defence Bunker
- Nottingham Regional War Room and RSG
- Nowa Ruda Coal Mine
- Nyköping Civil Defence Bunker
- Oakengates ROC Post
- Oakington Airfield Battle HQ
- Oare ROC Post
- Oban Minefield Control
- Oban ROC Group HQ
- Oban ROC Post
- Obelisk Medieval Vaults, Bristol
- Ockham Hatchford Park School Ice House
- Odenplan Metro Station
- Odeon Queensway Cinema
- Odessa Catacombs
- Odiham ROC Post
- Offham Funicular Railway Tunnels
- Ogborne St. George ROC Post
- Okehampton ROC Post
- Old Elbe Tunnel, Hamburg
- Old Leake ROC Post
- Old Sarum Airfield Battle HQ
- Old Woking HAA Battery
- Oldham Civic Centre
- Olney ROC Post
- Omagh ROC Post
- Ombersley ROC Post
- Onich ROC Post
- Opatów Cellars
- Oranienplatz Ghost Station, Air-Raid Shelter and Berlin Wall
- Orford ROC Post
- Orfordness
- Orpington Southern Railway Control Centre
- Orsett ROC Post
- Oscar II Fort Gothenburg
- Osmotherley ROC Post
- Ossington Airfield Battle HQ
- Oswestry ROC Post
- Osówka Underground City (Project Riese)
- Otterburn ROC Post
- Otterham ROC Post
- Ottringham BBC Radio Station
- Oundle ROC Post
- Ouseburn Culvert
- Out Newton / Withernsea / Tunstall ROC Post
- Outwood Lane Air-Raid Shelter Banstead
- Ouvrage Four-à-Chaux, Maginot Line
- Overton (Hants) ROC Post
- Overton ROC Post
- Oxelösund Underground Oil-storage Tanks
- Oxford County Emergency Centre
- Oxford ROC Group HQ
- Oxfordshire County Emergency Centre
- Oxgate Admiralty Citadel
- Oxshott ROC Post
- Oxton ROC Post
- Paddington Borough Control
- Paddock Standby Cabinet War Room
- Padiham ROC Post
- Pagham ROC Post
- Paignton ROC Post
- Painshill Park Ice House
- Pakefield ROC Post
- Pankstrasse U-Bahn Station and Bunker
- Par ROC Post
- Parbold ROC Post
- Parc des Buttes-Chaumont
- Paris Catacombs
- Paris Sewer Museum (Musée des Égouts)
- Park Crescent Ice Well
- Park Hill Tunnel
- Park Lane Quarry
- Park Street ROC Post
- Parkgate ROC Post
- Parson Drove ROC Post
- Parton ROC Post
- Patrington GCI Radar Station
- Pattingham ROC Post
- Paulsgrove Quarry Radio Station
- Pavenham ROC Post
- Paxton Tunnel
- Peacehaven ROC Post
- Peak Cavern / Devil's Arse
- Pear Tree House London South East Group War Headquarters
- Peat Inn ROC Post
- Pechersk Lavra (Cave Monastery) Kyiv
- Peebles ROC Post
- Peel ROC Post
- Pegwell Bay Seaweed Tunnel
- Pembrey Airfield Battle HQ
- Pen-y-Groes ROC Post
- Penarth ROC Post
- Pencader ROC Post
- Penclawdd ROC Post
- Pencoed ROC Post
- Pencombe ROC Post
- Pendeford Airfield Battle HQ
- Penhow ROC Post
- Penicuik ROC Post
- Penketh Heavy Anti Aircraft Battery
- Penmachno ROC Post
- Penmaen ROC Post
- Penrhos Airfield Battle HQ
- Penrith ROC Post
- Penryn ROC Post
- Penshurst ROC Post
- Pentrefoelas ROC Post
- Pentyrch ROC Post
- Penyffordd ROC Post
- Perranporth Airfield Battle HQ
- Perridge Tunnel
- Pershore Airfield Battle HQ
- Pershore ROC Post
- Perth Airfield Battle HQ
- Peterborough (Cambs) Airfield Battle HQ
- Peterchurch ROC Post
- Peterhead(1) Airfield Battle HQ
- Peterhead(2) Airfield Battle HQ
- Petit Ouvrage Bois Karre Maginot Line
- Petit Ouvrage Col de Garde, Maginot Line
- Petit Ouvrage Col des Banquettes, Maginot Line
- Petit Ouvrage Immerhof, Maginot Line
- Petite Ceinture
- Petworth ROC Post
- Pevensey Chain Home Radar Station
- Pevensey ROC Post
- Picc-Vic Underground Railway
- Pickering ROC Post
- Piercebridge ROC Post
- Pierremont Air Raid Shelter
- Pinhoe ROC Post
- Pinner Hill Ice House
- Pinnock Tunnel
- Piper's Hole Cave
- Pit House ROC Post
- Pitcaple ROC Post
- Pitreavie Castle Combined HQ
- Place des Fêtes Metro Station
- Pleasley Hill ROC Post
- Pluckley Private Fallout Shelter
- Pluckley ROC Post
- Plymouth Borough Control
- Plymouth Emergency Centre
- Plympton ROC Post
- Plymstock ROC Post
- Pocklington Airfield Battle HQ
- Pocklington ROC Post
- Podington Airfield Battle HQ
- Poix de Picardie Chalk Quarry and German Bunker
- Polebrook Airfield Battle HQ
- Polesworth ROC Post
- Polperro ROC Post
- Poltimore Park Exeter ROC Group HQ
- Pomeroy ROC Post
- Pontardulais ROC Post
- Ponteland ROC Post
- Ponterwyd ROC Post
- Pontrhydygroes Deep Adit
- Pontrilas ROC Post
- Pontypool ROC Post
- Pontypridd ROC Post
- Pooles Cavern
- Pope's Grotto
- Port Ellen Airfield Battle HQ
- Port Ellen ROC Post
- Port William ROC Post
- Portadown ROC Post
- Portaferry ROC Post
- Porth Hellick Burial Chamber
- Porthcawl ROC Post
- Porthcurno Underground Telegraph Station
- Porthgain Quarry Tramway Tunnel
- Portishead ROC Post
- Portland Bill ROC Post
- Portland Naval HQ
- Portland Rotor Radar Station
- Portlethan ROC Post
- Portmadoc ROC Post
- Portobello ROC Post
- Portpatrick ROC Post
- Portreath Reporting Post
- Portree bunker
- Portree ROC Post
- Portsdown Oil Fuel Depot
- Portsmouth BT Repeater
- Portsmouth District Council Emergency Centre
- Portsoy ROC Post
- Portway number 1 Tunnel
- Portway number 2 Tunnel
- Post Office Railway (Mail Rail)
- Post Office Railway (Mail Rail) - Paddington Station
- Poulton ROC Post
- Powick ROC Post
- Powrie ROC Post
- Poynton ROC Post
- Prague Kolektory
- Prague Metro
- Prague Metro Kačerov depot
- Prague Nuclear Bunker
- Praze ROC Post
- Prees ROC Post
- Prestatyn ROC Post
- Prestatyn Rotor Radar Station
- Preston on the Hill ROC Post
- Preston ROC Group HQ (Langley Lane)
- Preston ROC Post
- Prestwich ROC Post
- Prestwick ROC Post
- Princes Risborough ROC Post
- Princess Annes Battery
- Priscilla Catacombs
- Proposed Croydon Tramlink in 1950
- Prospect Railway Tunnel
- Prudhoe ROC Post
- Pulborough ROC Post
- Puriton ROC Post
- Père Lachaise Cemetery
- Pétrusse Casemates
- Quadring Eaudyke ROC Post
- Quarry Hill Stone Quarry (Barnsley)
- Queenborough Sub Control
- Queensway Road Tunnel
- Queslett BT Repeater
- Radstock ROC Post
- RAF 5 Group Bomber Command HQ - Grantham (LOST)
- RAF Alconbury Cold War Bunkers
- RAF Benbecula Control & Reporting Point (CRP)
- RAF Bentley Priory Bunker and Museum
- RAF Bentwaters
- RAF Burtonwood
- RAF Catterick SOC
- RAF Colerne
- RAF Daws Hill
- RAF Debden SOC
- RAF Digby Sector Operations Room
- RAF Drytree
- RAF Durrington
- RAF Edzell
- RAF Greenham Common
- RAF Harpur Hill
- RAF Laarbruch and Museum
- RAF Machrihanish
- RAF Madley - Domestic Site
- RAF North Weald SOC and Epping Forest District Council Emergency Centre
- RAF Rudloe Manor (No2 Site)
- RAF Spitalgate Airfield Battle HQ
- RAF Templeton Uniter Bunker
- RAF Tiree
- RAF UNITER Communications Building - Fort George (Inverness)
- RAF UNITER Communications Building - RAF Turnhouse Outhmuir
- RAF Upper Heyford
- RAF West Malling
- RAF Woodbridge
- RAF Woodvale
- Rain Hall Rock Quarry Branch Canal Tunnels
- Rainham (Kent) ROC Post
- Rainham ROC Post
- Ram Hill Colliery
- Ramsbury Airfield Battle HQ
- Ramsey (IoM) ROC Post
- Ramsey ROC Post
- Ramsgate Air Raid Shelter And Scenic Railway
- Randalstown ROC Post
- Raschpëtzer Qanat
- Rathfriland ROC Post
- Rattlesden Mk1 Bloodhound Missile Site
- Raunds ROC Post
- Ravensden ROC Post
- Reading Regional War Room
- Reading Station Air Raid Shelter & Vincents Factory
- Reading Thames Water Control Centre
- Rearsby ROC Post
- Redcar ROC Post
- Redcliffe Railway Tunnel, Bristol
- Redditch ROC Post
- Redhill Airfield Battle HQ
- Redhill ROC Post
- Redhill Southern Railway Control Centre
- Rednal Airfield Battle HQ
- Redrow ROC Post
- Reepham ROC Post
- Reeth ROC Post
- Regent College Air Raid Shelter
- Reigate Borough Emergency Centre and Surrey County Standby Emergency Centre
- Reigate Caves
- Reigate College Ice House
- Reigate Mobilisation Centre
- Reigate Road Tunnel
- Resolven ROC Post
- Rhayader ROC Post
- Rhoose ROC Post
- Rhosneigr ROC Post
- Rhossilli ROC Post
- Rhydymwyn Valley Works
- Richmond Borough Emergency Centre
- Richmond ROC Post
- Ridge Quarry
- Ridgeway Hill AAOR
- Ridgway Cross ROC Post
- Rijckholt Neolithic Flint Mine
- Ringstead Chain Home radar station
- Ringway Airfield Battle HQ
- Ringwood ROC Post
- Ripley (1st site) ROC Post
- Ripley (2nd site) ROC Post
- Riseley ROC Post
- River Irk Cattle Bridge
- River Tyne Road Tunnels
- Road of Remembrance Naval Bunker
- Roade ROC Post
- Roadhead ROC Post
- Robertsbridge ROC Post
- Robin Hood's Bay ROC Post
- Rochester Shorts Brothers Factory and Public Air Raid Shelter
- Rochford Airfield Battle HQ
- Rochford ROC Post
- Rockcliffe ROC Post
- Rodmersham Green ROC Post
- Roedean School Tunnel
- Rogate ROC Post
- Rome Metro
- Ronville Tunnels (Carrière Wellington)
- Rosary Road Norwich
- Rosedale Mines and Tramway
- Rosedale ROC Post
- Rosehearty ROC Post
- Rosevale Mine, Zennor
- Rossington ROC Post
- Rothbury ROC Post
- Rotherfield ROC Post
- Rotherham County Borough Control
- Rothwell Civil Defence Control
- Rothwell Haigh Grid Control Centre
- Rotundas
- Rougham Airfield Battle HQ
- Roxton ROC Post
- Royal Naval Munitions Depot Newton Noyes
- Royal Navy Cordite Factory Holton Heath
- Royal Navy Flag Office Clyde Communication Centre - BAGATELLE
- Royal Navy Oil Fuel Store - Ardintoul
- Royal Navy Wee Fea Underground Oil Fuel Tanks
- Royal Ordnance Factory Chorley (Filling Factory No.1)
- Royston Cave
- Rudloe Manor 10 Group Operations Centre and ROC Sector Control
- Rue du Commerce, Souzay-Champigny
- Rugby Radio
- Rugeley ROC Post
- Rumelange Mining Museum
- Rushlake Green ROC Post
- Rushton Spencer ROC Post
- Ruthin ROC Post
- Rye Harbour ROC Post
- Rzeczka - Sztolnie Walimskie (Project Riese)
- Sacriston ROC Post
- Sadberge ROC Post
- Saffron Walden Uttlesford District Council Emergency Centre
- Saint Martin Metro Station
- Saint Michael's Cave
- Saint Quirin Chapel
- Saint-Sulpice Crypt
- Salen ROC Post
- Salisbury Urban District Control
- Saltash ROC Post
- Saltburn ROC Post
- Saltend ROC Post
- Sambrook ROC Post
- San Senatore Catacombs
- Sandbach ROC Post
- Sandford Levvy Mine
- Sandhead ROC Post
- Sandholme Bank ROC Post
- Sandown ROC Post
- Sandwich Rotor Radar Station
- Sandy ROC Post
- Sanquhar ROC Post
- Sapperton Canal Tunnel
- Sarre Brigade Headquarters
- Saughall ROC Post
- Saundersfoot ROC Post
- Sawbridgeworth Airfield Battle HQ
- Sawley ROC Post
- Sawtry ROC Post
- Saxa Vord Rotor Radar Station
- Saxmundham ROC Post
- Saxthorpe ROC Post
- Scaranish Rotor Radar Station
- Scarborough ROC Post
- Scarinish ROC Post
- Scarlett Chain Home Radar Station
- Scatsta Airfield Battle HQ
- Scawby ROC Post
- Schonfeld Stasi Bunker
- Schoolhill Chain Home Radar Station
- Schoolhill ROC Sector Control
- Schwarzer See Bunker
- Scone ROC Post
- Scotland Street Tunnel
- Scotter ROC Post
- Scourie ROC Post
- Scoveston Fort
- Sealand Airfield Battle HQ
- Seascale ROC Post
- Seaton Carew ROC Post
- Seaton ROC Post
- Seaton Snook Rotor Radar Station
- Seaview ROC Post
- Sedan Citadel
- Sedbergh ROC Post
- Sedgefield ROC Post
- Sedlec Ossuary
- Sedlescombe ROC Post
- Seighford Airfield Battle HQ
- Seil Island ROC Post
- Selbourne ROC Post
- Selsey ROC Post
- Sennen ROC Post
- Sennybridge ROC Post
- Settle ROC Post
- Sevington ROC Post
- Shakespeare Colliery
- Shalford Thames Water Control Centre
- Sharpitor ROC Post
- Shaw ROC Post
- Shawbury Airfield Battle HQ
- Sheerness RNXS Emergency Port Control
- Sheerness ROC Post
- Shefford ROC Post
- Sheldwich Lees ROC Post
- Shellingford Airfield Battle HQ
- Shenstone ROC Post
- Sheppey Harty Ferry Air Raid Shelter
- Shepshed ROC Post
- Shepton Mallett ROC Post
- Sherborne House Ice House
- Sherburn Hill ROC Post
- Sherburn ROC Post
- Shilbottle ROC Post
- Shiplake ROC Post
- Shipley Auxiliary Units Zero Station
- Shipton Rotor Radar SOC and RGHQ
- Shipton under Wychwood ROC Post
- Shirley Regional War Room
- Shirley ROC Post
- Shirwell ROC Post
- Shobdon Airfield Battle HQ
- Shooters Hill Air Raid Shelter
- Shoreham Airfield Battle HQ
- Shotts ROC Post
- Shrewley Canal Tunnel
- Shrewsbury Armed Forces HQ 9
- Shrewsbury ROC Group HQ
- Shrewton ROC Post
- Shurlock Row ROC Post
- Siarö Fort
- Sibson Airfield Battle HQ
- Sidmouth Harbour Railway and Tunnel
- Sidmouth ROC Post
- Silbury Hill Tunnels
- Silloth Airfield Battle HQ
- Siloth ROC Post
- Silverdale ROC Post
- Singleton ROC Post
- Sir Francis Level Gunnerside Gill
- Skegness ROC Post
- Skelmorlie ROC Post
- Skendleby Rotor Radar Station and RGHQ
- SKF Underground Factory Gothenburg
- Skipsea ROC Post
- Skirlaugh Holderness District Council Emergency Centre
- Skirlaugh ROC Post
- Skirwith Cave
- Skitten Airfield Battle HQ
- Slaley ROC Post
- Slamannan ROC Post
- Sleaford ROC Post
- Sloup Castle
- Smailholme ROC Post
- Smethwick Baths Air Raid Shelter
- Smoo Cave
- Snaefell Rotor Radar Station
- Snailbeach Mine
- Snailwell Airfield Battle HQ
- Snape Hill Mine
- Snarestone Canal Tunnel
- Snobs' Tunnel, Hanbury Hall
- Snodland ROC Post
- Snow Hill Station
- Soho Square Air Raid Shelter
- Solihull Borough Emergency Centre
- Solotvyno Salt Mine
- Sopley Rotor Radar Station
- South Creake ROC Post
- South Foreland RHQ Deep Shelter
- South Kensington Home Security Region 5 War Room
- South Kensington Underground Station
- South Kentish Town Station
- South Molton ROC Post
- South Street Caves Dorking
- Southall London North West Group War HQ
- Southampton Bitterne Eastern Sub Control
- Southampton City Council Control
- Southampton Docks Telephone Exchange
- Southend Borough Control
- Southery ROC Post
- Southminster ROC Post
- Southport Dukes House SRHQ
- Southport Merseyside County Standby Emergency Centre
- Southport ROC Post
- Southport Sefton Metropolitan Borough Emergency Centre
- Southsea ROC Post
- Southwark Borough Control
- Southwick ROC Post
- Southwold ROC Post
- Sowerby Bridge ROC Post
- Spadeadam ICBM Test Stands
- Spalding ROC Post
- Spean Bridge ROC Post
- Speedwell Cavern
- Speke Airfield Battle HQ
- Speke ROC Post
- Spelthorne Borough Control Emergency Bunker
- Spiennes Neolithic Flint Mines
- Spondon ROC Post
- Springfield ROC Post
- Springwell ROC Post
- St Albans City And District Council Emergency Centre
- St Annes Rotor Radar Station
- St Athan Airfield Battle HQ
- St Aubin Railway Tunnel and German Fuel Store
- St Austel Restormel Borough Emergency Centre
- St Clements Caves
- St George's Chapel Royal Vault
- St Helier Flood Relief Holding Tank
- St John's School Air-Raid Shelters, Redhill
- St Lawrence Remote Reserve Chain Home Radar Station
- St Leonard's Bank Railway Tunnel, Edinburgh
- St Levan Bunker House
- St Margaret's Bay Telephone Repeater Station
- St Margarets Bay Esplanade Defence Tunnels
- St Margarets Deep Shelter
- St Margarets Rotor Radar Station
- St Matthews School Air Raid Shelter
- St Pancras Borough Control
- St Warna's Well
- St. Abbs Head ROC Post
- St. Agnes ROC Post
- St. Andrews ROC Post
- St. Anthony ROC Post
- St. Asaph ROC Post
- St. Breward ROC Post
- St. Briavels ROC Post
- St. Columb Major ROC Post
- St. Cyrus ROC Post
- St. Fergus ROC Post
- St. Germans ROC Post
- St. Helens ROC Post
- St. Ives (Cambs) ROC Post
- St. Ives ROC Post
- St. Twynnells ROC Post
- St. Twynnells Rotor Radar Station
- Stadhampton ROC Post
- Stafford Staffordshire County Emergency Centre
- Stalham ROC Post
- Stamford Bridge ROC Post
- Standedge Tunnels
- Standon ROC Post
- Stanhope ROC Post
- Stannington ROC Post
- Stansted Auxiliary Units OB
- Staplefield Auxiliary Units OB
- Start Point ROC Post
- Station Z Air Ministry Citadel
- Staveley ROC Post
- Staxton Wold Rotor Radar Station
- Stay Behind Cave
- Staylittle ROC Post
- Steele Road ROC Post
- Steintorwall Bunker, Hamburg Central Station
- Stenigot Chain Home Radar Station and Ace High Relay Station
- Stenungsund Power Station
- Stepps ROC Post
- Steventon Home Office Store
- Steyning ROC Post
- Stirling Civil Defence Control
- Stockbridge (Hants) ROC Post
- Stockbridge ROC Post
- Stockholm Metro (Tunnelbana)
- Stockleigh Pomeroy ROC Post
- Stockport Air Raid Shelters Chestergate
- Stockport BT Repeater
- Stockwell Deep Shelter
- Stoer ROC Post
- Stoke Ferry ROC Post
- Stoke Golding ROC Post
- Stoke Hall Vaults
- Stoke Hill Bath Stone Mine, Limpley Stoke
- Stoke Newington Borough Control
- Stoke Newington Borough Control and Hackney Borough Control 2nd Site
- Stoke Orchard Airfield Battle HQ
- Stoke Orchard ROC Post
- Stoke School Wartime Shelter
- Stoke-under-Ham a.k.a. Hamhill ROC Post
- Stone Point ROC Post
- Stonehaven Kincardine and Deeside District Council Emergency Centre
- Stonehaven ROC Post
- Stoneleigh Park AAOR
- Stony Stratford ROC Post
- Stornoway ROC Post
- Storråberget Fortress, Hemsö
- Stottesdon ROC Post
- Stow ROC Post
- Stow-on-the-Wold ROC Post
- Strabane ROC Post
- Stradbroke ROC Post
- Straiton ROC Post
- Stratfield Turgis ROC Post
- Stratford Airfield Battle HQ
- Stratford Newham Borough Council Control
- Stratford ROC Post
- Stratford Tunnel Air-Raid Shelter
- Strathaven ROC Post
- Strathclyde Regional Council - Dumbarton Emergency Headquarters - Garshake
- Strathclyde Regional Council - Dumbarton Emergency Headquarters - Crosslet
- Strathdon ROC Post
- Strathyre ROC Post
- Strausberg NVA Communications and Operations Centre
- Streatley ROC Post
- Strensall ROC Post
- Strete ROC Post
- Stretham ROC Post
- Stretton (HMS Blackcap) Airfield Battle HQ
- Strichen ROC Post
- Strombierg Gypsum Mines
- Stromness ROC Post
- Strongpoint Corbiere, Jersey
- Strontian Lead Mines
- Strontian ROC Post
- Stroud Emergency Centre
- Stroud ROC Post
- Stump Cross Cavern
- Sturminster Newton ROC Post
- Sturton by Stow ROC Post
- Subterranean Passage, The Gloup & The Malt Barn
- Sudbury ROC Post
- Sumburgh Airfield Battle HQ
- Sumburgh ROC Post
- Sunderland Civic Centre Emergency Control Bunker
- Sunk Island ROC Post
- Sunny Hill Park Air-Raid Shelters
- Sutton Bassett ROC Post
- Sutton ROC Post
- Sutton Veney ROC Post
- Sutton-in-Ashfield Cold Store
- Swacliffe ROC Post
- Swaffham ROC Post
- Swallow ROC Post
- Swan Mine (Kingsdown Quarry)
- Swansea West Cross AAOR
- Swanton Morley Airfield Battle HQ
- Sway ROC Post
- Swinderby Airfield Battle HQ
- Swindon ROC Post
- Swingate Chain Home Radar Station
- Swynnerton RGHQ
- Swynnerton Royal Ordnance Filling Factory
- Sywell Airfield Battle HQ
- Säve Airfield Underground Hangar
- Söderhamn Civil Defence and Railway Transformer Bunkers
- Södersjukhuset Underground Hospital
- Tain ROC Post
- Talgarth ROC Post
- Talley ROC Post
- Talybont-on-Usk ROC Post
- Tamar Bridge, Plymouth
- Tantobie ROC Post
- Tar Tunnel
- Tarbert ROC Post
- Tarfside ROC Post
- Tarland ROC Post
- Tarporley ROC Post
- TAT-1 Terminal at Gallanach, Oban
- Tatenhill Airfield Battle HQ
- Tavistock ROC Post
- Taynuilt ROC Post
- Tayport ROC Post
- Tayside Regional Council Emergency Centre
- Tealing Airfield Battle HQ
- Tebay ROC Post
- Teignmouth ROC Post
- Telham Out Station (Auxiliary Units)
- Temple Cloud WW2 Shadow Factory
- Temple Combe ROC Post
- Temple Lead Mine
- Templepatrick ROC Post
- Templeton Airfield Battle HQ
- Tenbury ROC Post
- Tendring ROC Post
- Tenterden ROC Post
- Terlingham Water Tunnel
- Ternhill Airfield Battle HQ
- Tessin Naval Command Bunker
- Tetford ROC Post
- Teviotdale ROC Post
- Thame ROC Post
- Thames Barrier
- Thames Tideway
- Thames Tunnel and Brunel Museum
- Thankerton ROC Post
- The Grand Redoubt
- The Grand Shaft
- The Grove Air Raid Shelters
- The Lizard ROC Post
- The Lochaber Water Power Scheme
- The Margate Caves (Vortigern's Cavern)
- The Nursemaids' Tunnel
- The Royal Insurance Building Liverpool
- Thetford ROC Post
- Thirsk ROC Post
- Thomas Lane Tunnel
- Thornbury North Avon District Council Emergency Centre
- Thornbury ROC Post
- Thorne ROC Post
- Thornhill ROC Post
- Thornton ROC Post
- Thorpe Abbots Airfield Battle HQ
- Threlkeld ROC Post
- Thurlaston ROC Post
- Thurleigh Airfield Battle HQ
- Tibenham Airfield Battle HQ
- Ticehurst ROC Post
- Tiergarten 'Germania' Tunnels
- Tighnabruaich ROC Post
- Tilmanstone Aerial Ropeway
- Tilmanstone Colliery
- Tintagel ROC Post
- Tirley ROC Post
- Tisbury ROC Post
- Tiverton ROC Post
- Tobermory ROC Post
- Tockwith ROC Post
- Toddington ROC Post
- Todmorden ROC Post
- Tollerton ROC Post
- Tolleshunt D'Arcy ROC Post
- Tomatin ROC Post
- Tomintoul ROC Post
- Tonbridge Slade School Air Raid Shelter
- Tongue ROC Post
- Topcliffe ROC Post
- Torquay ROC Post
- Torrance House AAOR
- Torrington ROC Post
- Totnes South West Water Emergency Control Centre
- Toton Marshalling Yard Air-Raid Shelter
- Tottenham Borough Control
- Totternhoe Stone Quarries
- Tow Law ROC Post
- Tower Hamlets Borough Control
- Tower Hill Station
- Tower Subway
- Tows Bank Colliery
- Trafalgar Square Station
- Tranent ROC Post
- Tranmere Deep-Level Air-Raid Shelter
- Traquair ROC Post
- Trawsfynydd ROC Post
- Treak Cliff Cavern
- Trebetherick ROC Post
- Trecwn Royal Naval Armaments Depot
- Tregaron ROC Post
- Tregarth Tunnel
- Treleaver Rotor Radar Station
- Trerew Chain Home and Rotor Radar Station
- Trevor ROC Post
- Trewan Sands Rotor Radar Station
- Trill Mill Culvert, Oxford
- Trimingham Rotor Radar Station
- Truleigh Hill Rotor Radar Station
- Trumpet ROC Post
- Truro Cornwall County Emergency Centre
- Truro ROC Group HQ
- Truro ROC Post
- Tulloch ROC Post
- Tunbridge Wells Broadwater Down
- Tunbridge Wells Regional War Room
- Tunnellers' Memorial, Givenchy-lès-la-Bassée
- Tunnels Beaches, Ilfracombe
- Tunnels under Tain
- Tunstall ROC Post
- Turnberry ROC Post
- Turnhouse Edinburgh ROC Group HQ
- Turnhouse ROC Post
- Turriff ROC Post
- Turton ROC Post
- Tweedsmuir ROC Post
- Twinwood farm Airfield Battle HQ
- Twycross ROC Post
- Twyford Southern Water Emergency Control Centre
- Tyler Hill Railway Tunnel
- Tyn-y-Groes ROC Post
- Tyne & Wear Metro
- Tyne Bridge Tower
- Tynedale District Council Emergency Centre
- Tynemouth Fire Control Tower
- Tywyn Airfield Battle HQ
- Tywyn ROC Post
- Uddingston BT Repeater
- Udny Station ROC Post
- Uig ROC Post
- UKPN and Gas Utilities Tunnel, Surbiton
- Ullapool ROC Post
- Ullenwood AAOR
- Underground Street Keighley Royal Arcade
- Unstan Chambered Cairn
- Up Street ROC Post
- Upham ROC Post
- Upper Sapey ROC Post
- Uppingham ROC Post
- Upsall ROC Post
- Upton Magna ROC Post
- Upton ROC Post
- Upton-on-Severn ROC Post
- Upwell ROC Post
- US Navy Communications Station, Thurso
- Usk ROC Post
- Uttoxeter ROC Post
- Uxbridge AAOR
- Uxbridge Battle of Britain Ops Room
- Valley Airfield Battle HQ
- Vange AAOR
- Vange ROC Post
- Vastern Ditch Culvert
- Ventnor Chain Home Radar Station
- Ventnor Rotor Radar Station
- Verclut Point Casemate, Jersey
- Verdun Citadel
- Verwood ROC Post
- Veryan ROC Post
- Victoria Tunnel
- Villa Ada Air-Raid Shelter
- Vimy Ridge and Tunnels
- Voe ROC Post
- Vogrie House - Midlothian Alternative Standby Headquarters
- Wadebridge ROC Post
- Wakehurst Zero Station (Auxilliary Units)
- Walcott ROC Post
- Walferdange Gypsum Mine
- Walkern ROC Post
- Wallington ROC Post
- Walls ROC Post
- Walsall ROC Post
- Walthamstow Borough Control
- Walton on Thames Sub Control
- Walton-on-the-Hill Tunnels
- Walton-on-the-Naze ROC Post
- Wandsworth Borough Control
- Wansford ROC Post
- Wanstead South East London Group Control
- Wantage ROC Post
- Wapping Tunnel
- Wareham ROC Post
- Warmley BT Repeater
- Warren Row WWII Aircraft Factory and RSG
- Warren Street Underground Station
- Warrington ROC Post
- Wartling GCI Radar Station
- Wartling R7 Remote Type 7 Radar
- Wartling Rotor Radar Station
- Wartling Tx Rx Buildings
- Warton Airfield Battle HQ
- Warwick County Emergency Centre
- Waterbeach Airfield Battle HQ
- Wateringbury ROC Post
- Waterloo Station Vaults
- Watermouth Caves
- Watford Roc Group HQ
- Watlington ROC Post
- Watnall Fighter Command 12 Group Filter Room
- Watten ROC Post
- Wattisham Anglia Radar
- Wattisham Mk2 Bloodhound Missile Site
- Watton ROC Post
- Wawne AAOR
- Wearhead ROC Post
- Wedel Auxiliary Hospital Bunker
- Wee Fea Naval Communications And Operational Centre, HMS PROSPERINE
- Weedon Royal Ordnance Depot
- Week St. Mary ROC Post
- Weeton ROC Post
- Well Of The Seven Heads / Tobar Nan Ceann
- Wellesbourne Mountford Airfield Battle HQ
- Wellingore Airfield Battle HQ
- Wellington ROC Post
- Wells-next-the-Sea ROC Post
- Welshpool ROC Post
- Welwyn ROC Post
- Wemyss Caves
- Wenallt AAOR
- Wentworth GHQ Home Forces
- West Beckham ROC Post
- West Calder ROC Post
- West Harptree ROC Post
- West Hoathley ROC Post
- West Kilbride ROC Post
- West Linton ROC Post
- West Lulworth ROC Post
- West Malling Airfield Battle HQ
- West Mersea ROC Post
- West Myne Rotor Radar Station
- West Norwood Cemetery and Catacombs
- West Raynham Airfield Battle HQ
- West Raynham ROC Post
- West Walton ROC Post
- West Wickham ROC Post
- Westbury-on-Severn ROC Post
- Westbury-sub-Mendip ROC Post
- Westdown (Drapers Field) Air-Raid Shelter
- Western Approaches Headquarters
- Westerton ROC Post
- Westleton ROC Post
- Weston super mare Airfield Battle HQ
- Weston Turville ROC Post
- Weston-on-Trent ROC Post
- Westruther ROC Post
- Westwood Quarry
- Wetwang ROC Post
- Weybridge ROC Post
- Wheal Martyn China Clay Works
- Whitburn ROC Post
- Whitby ROC Post
- Whitchurch (Bucks) ROC Post
- Whitchurch (Here) ROC Post
- Whitchurch ROC Post
- White Scar Cave
- Whitehaven ROC Post
- Whitehawk School Air Raid Shelter
- Whitehead ROC Post
- Whitequarries Oil Shale Mine
- Whitestone ROC Post
- Whitfield ROC Post
- Whitley Bay ROC Post
- Whitley Bridge ROC Post
- Whittingham ROC Post
- Whittlesey ROC Post
- Whitwell ROC Post
- Wick Airfield Battle HQ
- Wick ROC Post
- Wick Rotor Radar Station
- Wickenby Airfield Battle HQ
- Wickersley ROC Post
- Wickham Bishop ROC Post
- Wickham Market ROC Post
- Wickhambrook ROC Post
- Widdenton Thames Water Control Centre
- Wieliczka Salt Mine
- Wigmore ROC Post
- Wigton ROC Post
- Wigtown Airfield Battle HQ
- Wildpark Communications Centre
- Wilhemsburg Flak Tower Hamburg
- Wilkinson's Air-Raid Shelter, North Shields
- Williamson's Tunnels
- Willingham ROC Post
- Wilsthorpe ROC Post
- Wilton Park Eastern Comman War Headquarters and Armed Forces HQ 5
- Winchelsea Caves, Dover
- Winchester ROC Group HQ
- Windermere ROC Post
- Windrush Airfield Battle HQ
- Windrush Stone Quarry
- Windsor ROC Post
- Winfield Airfield Battle HQ
- Wingham Colliery
- Winkleigh ROC Post
- Winscombe ROC Post
- Winterton (Lincs) ROC Post
- Winterton ROC Post
- Wiseton ROC Post
- Witchampton ROC Post
- Witheridge ROC Post
- Witney West Oxfordshire Emergency Centre
- Wittering Airfield Battle HQ
- Woking Borough Emergency Centre
- Wollenberg Troposcsatter Station
- Wolston ROC Post
- Wolviston ROC Post
- Wood Lane Underground Station
- Woodford(1) Airfield Battle HQ
- Woodford(2) Airfield Battle HQ
- Woodham Ferrers ROC Post
- Woodland ROC Post
- Woodley Airfield Battle HQ
- Woodnesborough Colliery
- Woodvale ROC Post
- Wookey Hole
- Woolacombe ROC Post
- Woolley Colliery
- Woolverstone ROC Post
- Woolwich Arsenal Elizabeth Line Station
- Woolwich Foot Tunnel
- Woolwich Sub Control
- Wooton ROC Post
- Workington ROC Post
- Wormley ROC Post
- Worsley AAOR
- Worth Matravers ROC Post
- Worthy Down Airfield Battle HQ
- Wrexham Airfield Battle HQ
- Wrocław Contemporary Museum (Muzeum Współczesne Wrocław)
- Wroughton Airfield Battle HQ
- Wroughton ROC Post
- Wye ROC Post
- Wyggeston Girls' School Air-Raid Shelters, Leicester
- Wykeham ROC Post
- Wylde Green AAOR
- Wylye ROC Post
- Wymering Air-Raid Shelter
- Wymeswold Airfield Battle HQ
- Wymeswold ROC Post
- Wymondham ROC Post
- Wyton Airfield Battle HQ
- Wünsdorf Military Base
- Yarrow ROC Post
- Yeadon Leeds ROC Group HQ
- Yeovil ROC Group HQ
- Yeovilton Airfield Battle HQ
- Yetminster ROC Post
- Ynysddu ROC Post
- York Knavesmire WW2 ROC Group Control
- Ystrad Einon Mine
- Zonneberg Quarry
