First footage from inside GCHQ: the home of Britain's spy network

For the first time in history, cameras have been let into Government Communications Headquarters (GCHQ) in Cheltenham.
GCHQ is situated in a huge circular building known as The Doughnut, the heir of the war-winning codebreakers. Up to 5,500 employees monitor the communications of of national security, “economic well-being’’ and combating serious crime.
It was originally established after World War One as the Government Code and Cypher School (GC&CS) and was known under that name until 1946.
During the Second World War it was located at Bletchley Park. It was hear that it gained further prominence for its role in the breaking of the German Enigma codes.

http://www.telegraph.co.uk/news/uknews/defence/11350481/Watch-First-footage-from-inside-the-Government-Communications-Headquarters.html