Dennis,
Thank you for your
correction....you are quite right...killed on active service.
I guess he could have been attached to some kind of Glider-Towing activity, most probably with 4-engined aircraft...this is why he flew on that glider "observing" the procedures, not actually flying.
YES, I researched indeed the archives informed and found his DFC Citation (which do not inform his Squadron...so I guessed that most probably he "may" have flown with 1 PRU earlier on his First Tour of Operations):
P/O. A. AUSTIN. R.A.F.V.R.-P,'O. Austin has
at all times displayed outstanding determination
in operations against the enemy. He has participated
in many successful soities on which excellent
photographs of the target area have been
obtained, often in the face of intense enemy opposition.
Yours,
Adriano S. Baumgartner