German spy watches D-Day exercises

13th May 1944: 'ARABAL' tells Nazis that US troops in Scotland are preparing for the invasion of Norway

Scotland was the site of many amphibious landing exercises - but they were not watched by German spies. Lord Louis Mountbatten (on right) watching a landing exercise on the beach at the combined operations centre at Dundonald Camp in 1942. Note the fact that the men are using a dummy landing craft, the ramp of which leads into shallow pit filled with wa…