Originally Posted by
Diver Boy
I thought the GUF would apply to only the BA metal flights on the booking and as OP is on A380 LHR - LAX return that is where they used the GUF.
That's exactly it:
CAI-LHR BA Club
LHR-LAX BA First
LAX-HNL AA First (but sold into a Business fare bucket: I in this case)
Seemed like the best use of the GUF2 which only had a few weeks of validity left on it