Simon Glancey has submitted the following:
Sgt. Posgate was the pilot of Lockheed Hudson I T9326 QX-V of 224 Squadron, which was lost on a convoy escort mission. The Hudson crashed minutes after taking off from R.A.F. Aldergrove, with the loss of all five crew members.
Royal Air Force Coastal Command Losses of the Second World War: Vol.1: Aircraft and Crew Losses 1939-1941; Ross McNeill; 2003; Midland Publishing; ISBN 1 85780 128 8, page 67
He is remembered in Berwick on B25.35