I'm in Barcelona and I've taken a antigen test ready for my flight back to the UK in the morning and I've gone back and read the rules and it seems that Spain is the only amber list country where you have to take a pcr instead of a lateral flow to return to the uk? The wording is ambiguous as it says it is 'advised' not that you must. Has anyone travelled to Spain recently and can tell me if they will let me on the plane? I'm panicking.