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John Cairncross. John Cairncross (25 July 1913 – 8 October 1995) 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 influenced the Battle of Kursk.
John Cairncross was a British literary scholar and civil servant who was identified in the 1990s as the “fifth man” in the notorious Cambridge spy ring that included Kim Philby, Guy Burgess, Donald Maclean, and Anthony Blunt.
- The Editors of Encyclopaedia Britannica
John Cairncross, the last survivor of the KGB's "Ring of Five", was a testament to misconceived idealism among Britain's intelligentsia in the 1930s and to the futility of MI5's hunt...
John Cairncross, a member of the infamous Cambridge Ring of Five, leaked highly sensitive documents to the Soviet Union.
Jul 28, 2019 · JOHN CAIRNCROSS was among the most damaging spies of the twentieth century. A member of the infamous Cambridge Ring of Five, he leaked highly sensitive documents from Bletchley Park, MI6 and the Treasury to the Soviet Union – including the first atomic secrets and raw decrypts from Enigma and Tunny that influenced the outcome of the Battle of ...
- Christopher Smith
- 256
- 2019
- Stroud
Oct 10, 1995 · John Cairncross, the "Fifth Man" in a ring of British spies that gave Western secrets to the Soviet Union, died on Sunday at his home in the west of England. He was 82.
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Apr 25, 2022 · John Cairncross, the fifth man of the Cambridge ‘Ring of Five’, was one of the most significant spies of the twentieth century. The KGB officer, Anatoliy Golitsyn, who defected to the West in 1961,...
