I remember when one of our VC10s received fuel at Guam and the invoice came in for the "Royal British Air Force". It was sent back to the USAF as "not known at this address",
I was an aircrew cadet looking over the shoulder of a Herc skipper en route to Nellis in 1980. Ascot Radio call: this is ASCOT blah blah, good morning, I'd like to... etc
US ATC: What service are you sir?
Ascot: Royal Air Force.
ATC: Which Royal Air Force Sir?
Ascot:
THE Royal Air Force, Ascot blah blah.
ATC: Roger that (though I'm sure he wasn't sure!)
Priceless exchange!
CG