Simon Glancey has submitted the following:
Sgt Forster was killed when Avro Lancaster III ED935 of 156 Squadron was lost on a mission to Munster. The Lancaster crashed in the Ijsselmeer, with the loss of all eight crew members (it was carrying an extra crew member as second pilot).
Royal Air Force Bomber Command Losses of the Second World War: 1943;W.R. Chorley; 1996; Midland Counties Publications; ISBN 0 904597 90 3, page 177
