"The heroics of a Second World War spy who went undercover in Nazi-controlled Europe have finally emerged following his death at the age of 93. As a teenager, John Potter was smuggled into France by submarine in 1942, taking on the identity of a dead Frenchman to set up resistance groups. Mr Potter, who kept his spy career secret from his family for 50 years, was regularly flown back to Britain to meet with Winston Churchill. The Prime Minister would then give him a glass of brandy before sending him back to Saint-Flour in France, where his mission was to protect several villages. Following the war, he witnessed the horrific scenes of the Dachau concentration camp, near Munich in Germany. He also assisted during the Nuremberg Trials, becoming a confidant for chemists responsible for the production of lethal gas." British WWII spy sent to live in Nazi-occupied France | Daily Mail Online