Hi HongKongKiwi ...
Great to hear from you !
I've also put up a potted history of 1 AEF on Wikipedia which you might find of interest ... got a couple of amendments to make at some point
No. 1 Air Experience Flight RAF
I'll drop you a PM as I'd like to ID some of the other guys in that photo ... at the moment I only recognise Dave Croucher and Ted Girdler (RIP). I'm from the Boss Shelton era but also knew Boss Paddy Brown.
Best regards ...
Coff.