| 24 August 2025 | Godstone Mine, Surrey (TBC) Members-only event, booking required via self-service |
| 31 August 2025 | Ramsgate Tunnels - Deep Shelter Explorer Members-only event, booking required via self-service |
| 31 August 2025 | Ramsgate Tunnels - Overground Underground Members-only event, booking required via self-service |
| 11 October 2025 | Brookwood Cemetery Mausoleums Members-only event, booking required via self-service |
| May 2025 October 2025 | Channel Islands Occupation Society - Jersey - Open Days |
| June 2025 September 2025 | Festung Guernsey - Open Days |
| July 2025 August 2025 | Cuckfield ROC Post Open Days |
| 13-14 September 2025 | Skelmorlie Royal Observer Corps Post, Ayrshire |
| 13-14 September 2025 | Arbroath Royal Observer Corps Post, Angus |
| 20-21 September 2025 | Bervie Brow Rotor Station, Aberdeenshire |
| 20-21 September 2025 | North Entrance Open Days, Western Heights, Dover |
| 26-28 September 2025 | Hidden Earth 2025 - Llangollen |
| 26-28 September 2025 | SFES (Société Française d'Etude des Souterrains) Congress in Vendeuvre-du-Poitou |
| 09-14 October 2025 | Forts around Antwerp and Liege (FSG trip) |
| 19-22 June 2026 | NAMHO Conference - Swaledale, Yorkshire |
