Dunkirk resonates through British history. The "miracle of deliverance", as Prime Minister Winston Churchill described the evacuation of nearly 340,000 troops from the small French port, in most people's minds marks the end of British involvement in France in 1940. Dunkirk finally fell to the advancing German forces but it was far from the end of the story. Tens of thousands of troops and British civilians were still in France. By the end of June, a further 250,000 people had been brought back to the United Kingdom. This is the story of that second miracle of deliverance that has...