Oleg Gordievsky

Oleg Gordievsky, CMG (Russian Олег Антонович Гордиевский; born 10 October 1938) is a Russian former intelligence officer. He served as Colonel of the KGB and KGB resident-designate (rezident) and Bureau Chief in London, who was a secret agent of the British Secret Intelligence Service from 1974 to 1985. He is now a British citizen.