Oleg Gordievsky is a famous KGB double agent who worked for British Intelligence and escaped to the West in 1985. His information about Soviet plans and the role of Gorbachev gave Thatcher and Reagan the confidence to negotiate the end of the Cold War. His story has been told first in his own memoir Next Stop Execution and recently in Ben MacIntyre’s The Spy and the Traitor. He collaborated with Professor Christopher Andrew in a revelatory volume about the KGB’s operations around the world.