Toughest one so far, David. As suggested by an earlier post, I have been hammering at the Air Force Lists for 1943 and 1945 (already did the full POW list), but haven't been able to marry up any appropriate candidates yet.
My feeling is that it was taken at a POW camp just from the sparse surroundings and quality.
One of the permutations I have been trying is names names ending with a "Y* (true, that flourish at the end may just be an affectation, but my gut says otherwise).
Like diplodicus, I also think we may be looking at an initial and surname, rather than just the surname.
However, I think he is a P/O - the stripe doesn't look thick enough for a F/O.