Britain's Secret War

Britain's Secret War tells the astonishing story of how Britain's spies, boffins, and special operations teams helped to win the Second World War. The work of the Bletchley Park code breakers in breaking the German Enigma cipher is estimated to have cut the length of the war by around two years, saving countless lives, while the Double Cross system, in which German secret agents were "turned" by the British to feed their Nazi agent-runners with false information, ensured the success of the D-Day landings.