Winterbotham, Frederick William

Winterbotham, Frederick William

▪ British secret service official
born April 16, 1897, Stroud, Gloucestershire, England
died January 28, 1990, Blandford, Dorset

      British secret-service official who played a key role in the Ultra code-breaking project during World War II.

      Winterbotham joined the Royal Gloucestershire Hussars in 1915 but later transferred to the Royal Flying Corps, where he became a fighter pilot. He was shot down, and as a prisoner of war he learned to speak German. Upon leaving the military he attended the University of Oxford and received a degree in law in 1920. In 1929 he joined the British secret service (sometimes called MI-6) as chief of its air intelligence department. In this capacity he often visited Germany in the 1930s, using a Foreign Office job as cover. By 1939 he had also helped develop a new method of aerial photo-reconnaissance that was very useful to the British in World War II.

      In 1938 Winterbotham and his colleagues in MI-6 were made aware of a new mechanical encrypting device developed by the Germans, called Enigma. Polish code-breaking experts were able to penetrate this top-secret code system during the 1930s, so that British experts, employing information gained from the Poles and the French, were able to intercept, decode, and read many of the most important messages of the German armed forces as early as 1940. Winterbotham was put in charge of distributing this highly sensitive intelligence data, which was code-named Ultra, to the British leader Winston Churchill and to British field commands around the world. The information that Winterbotham's teams of operatives conveyed helped Allied planners and commanders to proceed against Axis forces with maximum strategic effect.

      Winterbotham was made a Commander of the British Empire in 1943 and received the Legion of Merit in 1945. He revealed the story of the Ultra project to the general public in his book The Ultra Secret (1974).

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