This Picture appeared in today's Mirror Newspaper. (I am nothing if not well read !) Possibly the lead boats were at Dunkirk however the picture is of the Local Defence Force's Upper Thames River Patrol. Believe my wife's Grandfather's boat 'Elsie', built by Hobbs of Henley and designed to keep up with a racing eight, patrolled the stretch between Henley and the White Hart at Sonning throughout the war. 19th May 2015