Introduction

Oleg Antonovich Gordievsky, CMG is a former colonel of the KGB who became KGB resident-designate and bureau chief in London.

He was a double agent, providing information to the British Secret Intelligence Service from 1974 to 1985.

Oleg was the highest ranked double agent from inside KGB and provided the British with information about the inside organisational structure of KGB, how it was ran and the decision making process behind it. 

He also provided inside information in the critical period of heightened nuclear tensions between NATO and the Soviet Union.