Heard of this incident a while back (if its the same one).
The big cheese(dick) auditing fella was apparently in the queue behind the co-pilot and overheard the debate regarding the phone bill. As far as I'm aware the RAF told him to start looking for work in the airlines!
Its typical the way this outfit forces upon its people duties for which they don't have the proper training/time/qualification, and then hangs them out to dry when they screw up.
The imprest is a royal pain in the ass especially on a big, busy det. Pitfalls lie all over the place yet crews are given little protection against this and personally taken to the cleaners when it goes pear-shaped.
Rant over. What was the question again?