Flt Sgt Allen joined the RAF in 1941 as an Air Gunner and while flying in American B-25 Mitchell bombers he took part in many raids into German occupied Europe both before and after D-Day.
At the time of the publication in the London Gazette, he had just been commissioned as Pilot Officer.
? Flight Sergeant
8 February, 1945: Pilot Officer on Probation (emergency)
8 August, 1945: Flying Officer (war sub)
26 February, 1949: Appointment to the RAFVR as Flying Officer
10 August, 1953: Flight Lieutenant
26 February, 1953: Period of commission extended by five years
26 February, 1959: Commission relinquished