Apologies if this is the wrong thread but I can't find where to post this question.
If I book a RTW ticket with AY as the issusing carrier, and I credit the points to BA, will that mean I will get the AY distance to tier mile conversion for all my flights or just the ones with AY (i.e. is operating carrier more important than marketing carrier). And if I credit the points to AY, will I get the points based on spend or on distance flown on non-AY operated flights?