I've read this somewhere already. Did u copy and paste it? However now I'm reading it for the third time I'm wondering if it pertains to the special service engagement; the SFX837 number that is. What is a special service engagement? Or maybe I should say what could it be? He went from being a leading airman in January 1943 to petty officer in Feb 1943, could that be it? Meanwhile I have written to the lovely Mr Jeff Dykes via his website as suggested by someone else.