4 Squadron's aircrew looks as though they are sitting on the steps of a seawall - believed to be at the Air-Sea Rescue Launch base at the North of Sylt?   Perhaps May55 Detachment? L to Right: Rear row seated: Brian Watson, Les Bradley, Bill Simms; 2nd row from back seated: Pete Smith, Chas Boyack, Al Armitage, Bob Daniels standing; Front row seated: Bob Smith, Bill Blake, "Chub" Gray, Fred Maycock, Pete Gilpin CO 4 Sqn standing.   (Thanks to Tony Pearce and Ron Gray for names.)