Posthumorous commision
My Uncle RAF No 189118 George Clark Mitchell of 103 Sqn (misspelt as Clarke on memorial) is recorded as a Pilot Officer, although on other sites (e.g Lostbombers.co.uk) he is recorded as a Flight Sergeant and was killed when Lancaster NE136 was shot down on 14 July 1944.
Question is, did the RAF sometimes posthumorously promote those killed in action and if so for what reason?