It is being rolled out now to be fair. They certainly have them here, with the ticket gates at stations being much like those at the Amex, with a scanner. http://www.nationalrail.co.uk/times_fares/ticket_types/100261.aspx
You NEVER need the bank card that it was paid on, even though it says you do. You do need a bank card though.
My company often buys my train tickets (as I assume most do) but they certainly haven't given me a credit card.
But yes, you should be able to do this then go to a ticket office and...