The hoot in my case was that having being seconded '' outside " by the U.K. , the RAF itself wasn't actually even paying me a dime.. So had they substantiiated my acting rank ,( incidentally supported by a series of Spec . Recs.) from my then substantive , then it wouldnt have cost a penny more than the nothing I was already being paid by the Service..
Ah well , all water well under the bridge now.