How GCHQ helped shape history: From world wars to the Cuban Missile Crisis
Tony Comer – who has worked for GCHQ for 36 years and has spent the last 10 as its historian – picks high-profile moments from its history.
Bletchley Park
Bletchley Park veterans honoured on 80th anniversary of invasion of Poland
More than 80 veterans who played a vital but secret role in the efforts to end the Second World War gathered to mark the 80th anniversary of the start of the conflict.
VIDEO: Pupils turn code breakers as World War II Enigma machine arrives at Monifieth High
Monifieth High School youngsters cracked the secret of a fascinating school day when they got their hands on a wartime Enigma machine.