Oleg Gordievsky

Oleg Antonovich Gordievsky, CMG (Оле́г Анто́нович Гордие́вский; born 10 October 1938) is a former colonel of the KGB who became KGB resident-designate (rezident) and bureau chief in London, and was a double agent, providing information to the British Secret Intelligence Service (MI6) from 1974 to 1985.[2] After being recalled to Moscow under suspicion, he was exfiltrated from the Soviet Union in July 1985 under a plan code-named Operation Pimlico. The Soviet Union subsequently sentenced him to death in absentia.