In April 1951, the disappearance of HM submarine Affray knocked news of the Korean War and Festival of Britain from the front pages. Affray had put to sea on a routine peacetime simulated war patrol in the English Channel. She radioed her last position at 2115hrs on 16 April, 30 miles south of the Isle of Wight - preparing to dive. This was the last signal ever received from the submarine. After m...