"The Man Who Never Was" is a great film about this episode. It adds quite a few "embellishments", including dealing with a German spy sent to London to verify William Martin, and his encounter with the MI5 clerk posing as his fiancee. One of my favourite war films.
Interestingly, it is believed that Ian Fleming played a part in its planning too. Appropriately cloak & dagger.
Interestingly, it is believed that Ian Fleming played a part in its planning too. Appropriately cloak & dagger.