Regarding Sgt. Warby (sic). Both CWGC and Chorley have him as Terence Eugene Warbey. I believe in your other thread you said you had Chorley for 1943? If so, you have the details, if not, let me know and I’ll post them here.
Interestingly, Chorley has him as Flight Engineer and not as air gunner. Perhaps the most interesting clue is the information you posted thus:
12 fts Gran Hnam, Lincs Feb 1942
That would indicate that he went initially for pilot training at 12 SFTS (Service Flying Training School) at Grantham. It is likely that he didn’t qualify as a pilot and therefore remustered for other aircrew duties eventually becoming a Flight Engineer.
Regards,
kev35