Guy Burgess

Guy Francis de Moncy Burgess (16 April 1911 – 30 August 1963) was a British radio producer, intelligence officer and Foreign Office official. He was a member of the Cambridge Five spy ring that passed Western secrets to the Soviets before and during the Cold War.

Burgess, Donald Maclean, Anthony Blunt, and Kim Philby were the four confirmed members of the Cambridge Five, a spy ring that contributed to the Communist cause with the transmission of secret Foreign Office and MI5 documents that described NATO military and Marshall Plan economic strategy.

Source: CC Wikipedia