Simon Glancey has submitted the following:
Sgt. Brown was the rear gunner on board Avro Lancaster I PA158 WP-S of 90 Squadron, which was lost on a mission to Dortmund. The Lancaster was shot down by an enemy fighter and exploded in mid-air at approximately 21.30 hours. It crashed in the western suburbs on Munchengladbach, with the loss of all seven crew.
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 66
Additional information about circumstances and crash site from the A.W.M.
Tony Hibberd has added:
Lancaster PA158 WP-S had departed Tuddenham at 1614 for Ops Dortmund
John George Brown is remembered at Bedlington on B15.02 and B15.08