As the Normandy landings approached, the surprise resignation from MI6 of the author Graham Greene – a close friend of Kim Philby – cast a shadow over one of the war’s most carefully orchestrated intelligence operations.
As the clock ticked down to D-Day the atmosphere in the central London office of Britain’s Secret Intelligence Service, MI6, reached feverish anticipation. Years of carefully calibrated deception, casting spells over the German generals defending the landing grounds...