Station X

In 1939, several hundred people - students, professors, international chess players, junior military officers, actresses and debutantes - reported to a Victorian mansion in Buckinghamshire: Bletchley Park. This was to be 'Station X', the Allies' top-secret centre for deciphering enemy codes.

Their task was to break the ingenious Enigma code used for German high-level communications. The settings for the Enigma...