Simon Glancey has submitted the following:
F/O Robson was killed when de Havilland Mosquito FB. Mk. VI PZ249 of 515 Squadron was shot down by flak on a bomber support mission to Leipheim airfield, with the loss of both crew members.
Royal Air Force Bomber Command Losses of the Second World War: 1945; W.R. Chorley; 1998; Midland Counties Publications; ISBN 0 904597 92 X, page 151
Tony Hibberd has added the following:
Mosquito PZ249 3P-? had departed Little Snoring at 1740 for a transit flight to Juvincourt where it landed at 1910It departed Juvincourt at 2325 for Ops Bomber Support
James William Robson is remembered in Ashington on A11.01 (A17.27) and A11.43 and in Hirst on H62.02