In early 1943 Britain was engaged in a struggle for survival. As the deadly wolf packs of German U-boats roamed the Atlantic, supply lines and shipping losses fell victim to the carnage. In desperation, Churchill turned to the RAF's maritime wing - an overlooked, underfunded force known as 'The Cinderella Service'. But the ascendancy of the U-boat forced a change in attitude. Provided with the long-range planes, depth charges, rocket projectiles and radar equipment with which to challenge the enemy. The Cinderella boys provided vital air defence the whole way across the Atlantic. The German hunters were now the hunted, and - in a stunning defeat - had fully retreated by the summer of 1943. Based on a wealth of new sources, including from diaries, log books, official records, archives and interviews, Leo McKinstry shines a new light the courageous pilots, ingenious scientists and political risktakers.