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It's not the arrival back in the UK I'm bothered about. But there are restrictions to enter Spain, even though it's only that you need to be fully vaccinated to enter, or show evidence of negative test, or previous recent infection if you aren't. I also am aware that the health control form has been scrapped, at least for vaccinated people.
What I am wanting to know is, to whom do you show these pieces of evidence. Along with your passport and boarding pass at passport control or what? If this is the case, that's fine, but I was under the impression that it is an airline's responsibility to ensure that all passengers are eligible to enter whatever country they are travelling to. Hence having to pre-enter passport information etc before being able to check in.
As we will be checking in online, and won't be seeing or speaking to any BA personnel prior to going airside, I needed to know what is the procedure for making sure they know we are eligible to travel, from a covid point of view.
I can't imagine an airline allowing anyone to board their plane without making sure that the passenger won't be refused entry at the other end. So, maybe you show this at the boarding gate? I admit I have no idea