This year marks the 70th anniversary of the famous Dambusters raid, when a group of highly trained RAF aircrew flew their specially modified Lancaster bombers to attack three dams in the German industrial heartland of the Ruhr. The secret of the operation rested on a unique bomb designed and tested by the brilliant aeronautical engineer Barnes Wallis. He had worked on the principal of an object dropped at the right height and speed over water would skim across the surface until it hit a target and exploded. He eventually devised a cylindrical shaped bomb mounted in callipers on the underside of the Lancaster and rotating backwards to ensure the bomb remained close to the dam wall after it struck.
Few would consider the island of Alderney as a place of great military importance. Whereas the German Occupation of the Channel Islands in general, and Jersey and Guernsey in particular, is well known and well documented, Alderney is usually overlooked. Yet its defences were on such a massive scale that the producer of this video examining the remains of the German defences, quite justifiably calls Alderney a Battleship Island.