The lined section of chamber No2 looking towards the escape tunnel. On the floor over on the right is a 6 inch deep pit, 1 foot square. Just above the camera is a short section of cable channel plate which would have had an electric light fixed to it. On the left out of shot is a alcove cut into the wall.

The liner is missing, and an alcove has been very roughly hacked into the wall. In the top left hand corner of the roof of the alcove is a 6 inch diameter borehole leading to the surface. This would have carried cabling for  telephone, electricity, and aerials.

 The borehole was deliberately offset so as to allow a gentle radius bend in heaver cables which would have otherwise intruded into the working tunnel.

With thanks to Pete Mason Friends of HMS Forward

The escape tunnel - 62 feet long and 5 feet by 5 feet in section. A concrete sill runs the length of the floor on the left hand side. At the end there is a 6 inch diameter borehole in the roof leading to the surface which contains a one inch diameter steel conduit.

Chamber No3 is not connected to the rest of the complex. It is 12 feet by 8 feet. The slots at ceiling level can be made out, their use is unclear. A poor photo  I agree, but I'm standing on a 2 foot ledge 40 feet above ground level. 

Directly above the Radio Station is an armoured cable sticking out of the ground. The cable is sheathed in paper, lead, steel wire, and steel tape. The track in the left photo leads to the remains of a small brick building (see below).

Recent undergrowth clearance has uncovered the remains of a brick built structure. This is directly above the radio station and was the sentry post used to guard the nearby radio masts.

There were at least four  radio masts in the area. Three to the west of the sentry post, and one to the east. Each mast was guyed at four anchor points, with 55 feet between adjacent anchors. Ten anchor points have been found like the one in the photo above which still has its 'D' shackle attached.