Originally Posted by
GinFizz
Okay - I am confused ... Are the "BA" flights from LHR to MAD with numbers 5XX (BA512-BA524) IB codeshares as far as using a GUF2 (and for that matter a GGL joker) is concerned?
The story is that to celebrate the marriage between IB and BA, all flights from either airline from LHR to MAD get BA prime codes regardless of operator, and all flights from MAD to LHR get IB prime codes, regardless of operator. They also all get IB or BA codeshares as appropriate.
The range BA 510 to BA 538 is reserved for IB-operated flights from LHR to MAD. As far as I am aware they are treated as codeshares for all purposes including GUFs etc. I would try a true BA-operated flight instead. You will find these flights in the BA 400-499 range.