This is the new headquarters of GCHQ, part of the UK's secret government intelligence services. The domain of GCHQ is "Elint"- electronic intelligence. MI5 and MI6 deal with "humint"- human intelligence, spies, assassins etc. GCHQ deals with intercepting and decoding communication; everything from diverting letters to decrypting military computers to reading your emails. It is part of a huge international network that includes the US National Security Agency at Fort Meade, Maryland. When a phone rings anywhere in the world, GCHQ can listen in on it!
The architecture of their new headquarters in Cheltenham is a bit sinister. It is a barred circle, a bit like a Ferris wheel. This is especially interesting when you consider Matt Delooze's last article which analyses the symbolism of this fairground attraction: http://www.matthewdelooze.co.uk/readarticle.php?article_id=33 . Some galaxies are also shaped this way. We're seeing more and more buildings in this shape I've found; they're called "rotundas". The plans for new Oxford Science Park features a rotunda: http://www.oxfordsp.com/property_future_plans.html Ben Fairhall of the Battling the Behemoth site (see links) has written several articles on the mystery of Madeline McCann. He's noticed that she has a birthmark or a scar on her iris that makes her eye into a barred circle too.
The new GCHQ building is currently under construction by this company, Carillion PLC, a building and civil engineering firm turned health service, airport, military and local government provider: http://www.carillionplc.com/default.asp This company was established specially to bid for the government's Private Finance Initiative contracts. They built the new extension of the hospital where I serve. I'm seconded to this company and the head porter is a Carillion employee.