As a PPL Holder and an AEF Staff Cadet I have tried to get a definite answer on this one for a while, and this is what came out last time I asked;
If you sit in the right hand seat, QFI in left, and he also has a Civil FI rating then it can go down as P1/S or P/UT.
Unfortunately it seems that plain AEF flying, i.e. sitting in left hand seat in a slot off of the end of a days flying, is simply Pax time.
I have quite a bit of time on the Tutor, most of which can only go down as pax time.
A.S.I