Corsham Computer Centre
Corsham Computer Centre (CCC) is an underground British Ministry of Defence installation in Corsham, Wiltshire, built in the 1980s. The centre supports the software maintenance of the United Kingdom nuclear deterrent programme; Trident
For some reason lots of UFO nuts seem to think that the underground bases round Corsham are very hush hush ( yes thats why there are road signs all round Corsham showing you were tripple C is).