Four major tunnels were constructed by the Germans for the storage of munitions and fuel. Two of these are in Water Lane (Ho 5 and Ho6) on either side of a narrow wooded valley.
The southern portal is between two houses on the west side of the valley, there is soil mounded in front of it although access is still possible. Initially the tunnel is dry with the floor strewn with rubbish but after a few yards there is mud and debris which becomes somewhat deeper than Ho 5 making progress very difficult at times.
The tunnel is now largely unlined although it was originally lined with timber which has now fallen away and lies rotting on the floor. After about 50 yards there is a major roof fall, the tunnel bends to the right at this point and a branch comes in from the left. The branch is about 100 yards long. The main tunnel continues for a further 75 yards to two concrete lined storage chambers, both on the west side of the tunnel. The 1st chamber is about 15 feet in height and 55 feet long while the second chamber, 30 feet beyond is about 8 feet high and 60 feet long. One of these chambers contains a number of bed frames indicating that it was used as a personnel shelter.
There is a 60cm tramway laid throughout much of the tunnel including the branches and chambers. After a further 75 yards the main tunnel turns to the right towards the now blocked northern entrance. A branch tunnel turns to the left and after 75 yards splits into two, both tunnels continue for a further 25 yards.
Despite the debris and deep mud the walls appear reasonably sound although the tunnel should only be entered by those properly equipped. The tunnel was built for munitions storage.