A chap was a part of the ground force in 1939. CWGC have him as - Flight Lieutenant (Pilot) London Gazette - Friday 25th January 1946 Acting Flight Lieutenants - awarded Distinguished Flying Cross. ROYAL AIR FORCE VOLUNTEER RESERVE. GENERAL DUTIES BRANCH. Appointment to commission. As Pit. Offs. on prob. (emergency): — 23rd October 1943 Does 'As Pit. Offs. on prob.' mean 'Pilot Officer on Probation'