During the early hours of 3 September 1940, two French fishing boats, Le Mascotte and Rose du Carmel, slipped across the English Channel and approached the coast of Kent. When they were a few hundred yards out from the Dungeness promontory, four men clambered from the vessels into a pair of rowing boats, making their way silently to the shore.
The four were Carl Meier, 23, a Dutch-born Nazi party member who had spent some time in Birmingham before the war; Charles van den Kieboom, 25, a Dutch-Japanese dual national; Sjoerd Pons, 28, a Dutchman; and a 25-year-old who described himself as German and called himself Jose Waldberg.
All of the men were agents of the Abwehr, and their mission was to reconnoitre England’s south coast for the invasion they…