Thanks for your explanations, corporate-wage-slave ^^^
Is AUP in FRA/LHR possible after OLCI or do I need to check in at the airport? If I should not check in (select a good seat) I better donīt count on the AUP option.
There is a Saturday night between the flights. When I checked flights seperately LHR-MAD was ~80 EUR in Y and ~ 170 EUR in J. I think I will try to contact IB and ask them if they could change accordnigly.