Bletchley Park History

With the declaration of peace, the frenzy of codebreaking activity ceased.

On Churchill's orders, every scrap of 'incriminating' evidence was destroyed. As the Second World War gave way to the Cold War, it was vital that Britain's former ally, the USSR, should learn nothing of Bletchley Park's wartime achievements.

The thousands who had worked there departed. Some continued to use their remarkable expertise to break other countries' cyphers, working under a new name: the Government Communications Headquarters (GCHQ).

The site became home to a variety of training schools: for teachers, Post Office workers, air traffic control system engineers, and members of GCHQ. In 1987, after a fifty-year association with British Intelligence, Bletchley Park was finally decommissioned.

For decades, the codebreakers would remain silent about their achievements. It was not until the wartime information was declassified in the mid-1970s that the truth would begin to emerge. And the impact of those achievements on the outcome of the war and subsequent developments in communications still has not been recognised fully.

Amateur Radio at Bletchley Park