Reply To: Will we be ‘turned away’ at check In?

[OldFashioned]

While I guess it’s possible it seems realistically no.

Considering how far in advance you booked it is quite possible that since then the card was lost/stolen or had fraud on it which meant it was replaced by Amex and thus has a new number etc.

Would probably be wise to have a supplementary card with your name on it so you can at least produce a BA Amex, but realistically the ticket isn’t going to be flagged for document check at Heathrow and you will be able to online checkin, bag drop ans thru security. If no checked luggage you would just checkin and go security.