Beginning life in London, it was famously homed in Bletchley Park in World War Two before moving to Cheltenham in 1950. Some photographs are from the GCHQ archives, while others show inside the ...

GCHQ has released never before seen images of Colossus, the UK's secret code-breaking computer credited with helping the Allies win World War Two ... at more than 2 metres tall, Colossus required ...

At the top of the British electronic intelligence agency is the Government Communications Headquarters (GCHQ), a very public ... a fascinating aspect of World War I communications technology.

Historians say their work shortened World War II by as much as two years. Colin said that among new recruits to GCHQ, “we now hear more and more that they first heard of GCHQ through puzzling.” ...

GCHQ's annual brainteaser comes in the form of the agency's Christmas card, sent by the intelligence organisation's director Anne Keast-Butler. This year's puzzle challenges the public to decode ...

GCHQ's annual brainteaser comes in the form of ... "We require a mix of minds and a mix of approaches to solve real world puzzles and because of that we encourage diverse thinking and that ...