Sgt. Allan was serving with 20 O.T.U. He was a crew member of Wellington X NC649 which took off from Moreton –in-Marsh on a night cross country training flight. The aircraft crashed out of control near Stow on the Wold, killing all the crew.
Royal Air Force Bomber Command Losses Volume 7: Operational Training Units 1940-1947. W.R. Chorley; 2002; Midland Publishing; ISBN 1 85780 132 6