[galgos]

Thank you Larry. I've been working on the assumption tha Billy was Australian and that Rolly may have been on a training course with him. I've been through all the "W Grays" and "* W Grays" in the Australian Nominal Roll; I don't believe there are any contenders from the former, though one or two possibilities with the latter, but unfortunately their files are not yet examined let alone digitised, though I have requested this. Another colleague has also suggested Canadian so that's a route I need to explore.
The odd thing also is the date written on the back which says Winter 1943. Again I'm assuming Rolly is an officer in this photo since he's not wearing his Sergeant's/Flight Sergeant's stripes, but he didn't receive his commission until January 1945, so the date could be wrong.
Regards
Max