Originally Posted by
KingCanute
Your confirmation may indeed say that your cabin class is first, but right next to that will be the business class fare basis. And as if to prove the process, all passengers will thus earn points etc based on the fare basis paid and not the cabin they were sitting in.
This actually also isn't entirely correct, at least when crediting to BA. The fare code for the "first" legs here is A and one earns the 60 tier points for first rather than 40 for business (even tough it actually says business (A) in the earnings).