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John Cairncross
British intelligence officer and spy for the Soviet Union (1913-1995) · United Kingdom · On the map · Writers · Died at 82
John Cairncross was a British civil servant who became an intelligence officer and spy during the Second World War. As a Soviet double agent, he passed to the Soviet Union the raw Tunny decryptions that may have influenced the Battle of Kursk. He was alleged to be the fifth member of the Cambridge Five.
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He was also notable as a translator, literary scholar and writer of non-fiction.
