In message , at 18:22:23 on Sun,
26 Feb 2012, " remarked:
Haven't seen Amex with a proximity card yet, though will be sure to
keep an eye out.

Is there any sort of timeframe when other UK banks plan to introduce
proximity cards?

Not seen anything.

Will they eventually serve as a replacement for Oyster cards, as I have
heard?

That is apparently the plan. With the various daily capping algorithms
applied to a series of CC charges, rather than the current stored-credit
smartcard.
--
Roland Perry