Thanks all. I don't fly a lot on OW airlines - I have status on Emirates and try to use them as much as possible, but I used Qatar last year and got the status match through Accor, and this year I'm doing UK/Spain/US and BA/Iberia are the best. I made an Avios reward booking on BA for London to Madrid - I'm guessing there's no way to attach my QR number to that? When I booked Iberia from Madrid to the US, I attached my BAEC number. I have now added my QR number to that booking, and that booking now seems to have both membership numbers attached to it. I guess it doesn't reallymatter because I already paid the extra for seat selection on those flights (damn!) so I guess it's only priority boarding that I could now get. Do you smart people think I'll be able to get that on Iberia? Is there any way to tell on the booking?