Ref the RAF exchange at 3 Regt. For a few years the DRQHI was RAF when the Regt was at Soest. After that I recall a crab Flt Comd (rank of Sqn Ldr) at 653 Sqn.
To train a guy or girl for 12-14 mth, to only get 18 mth return of service before they return to the RAF then have nothing further to do with Attack Aviation doesn't make sense. At least the Army officers who move on after the same investment end up at desks that revolve around 16 AA Bde or DAAvn and pass on hard earned knowledge onto the staff officers that sit a little higher.