Just booked LYS-STN-LYS with Easyjet, and for the first time have been asked to provide passport info at time of booking. It wasn't clear if this was a required for arrival in the UK, or for the return leg to France (or both!) I have seen this info being asked for Spain. Is it now europe-wide?
Had to do this two years ago when we flew LTN-AGP with Easyjet. We also had to do it again this year for the same journey. I don't think it applies to all European countries but I do think it's something the Spanish authorities require.
Standing by to be corrected.