Dunno how I managed to miss this thread. Fascinating place. Rumour has it that it is still used by weird folks teaching room clearance drills. The houses were in use up until the fifties. Sadly the rock became unstable and folks had to move out. It's quite weird that I walk past that place almost everyday when surveying (the common in the background is where I monitor adders), and never really noticed how extensive they were. I'm pretty familiar with the other rock caves and houses and even the ones well hidden from the public. But those escaped me.
Found any info on the climbing yet? Strange well too, be great to get down there.