The man was a spy for MI6. A senior KGB officer, for more than a decade he had supplied his British spymasters with a stream of priceless secrets from deep within the Soviet intelligence machine. No spy had done more to damage the KGB. The Safeway bag was a signal: to activate his escape plan to be smuggled out of Soviet Russia.
So began one of the boldest and most extraordinary episodes in the history of spying. Ben Macintyre reveals a tale of espionage, betrayal and raw courage that changed the course of the Cold War forever...