B of A isn't issuing any AGR cards now as that agreement expired. We are waiting to find out who the new partner will be.
But unless a bank has a charter in the UK, doubtful they can issue cards there, unless to existing customers who live there.
While BofA may issue some cards in the UK, probably not an AGR credit card. Don't you have to be a US resident to be an AGR member?
As stated above, BofA is not issuing any new AGR credit cards right now anyway.