In message , at
07:53:28 on Fri, 22 Nov 2013, Neil Williams
remarked:
Will visitors and others you be
able to buy an Oyster card at NR main termini, either a the (NR)
ticket office or at a shop there, and at Heathrow etc?

You can now do both of these at ticket machines.

And ticket machines, once a quick way to buy a ticket, often have long
queues, especially those where a visitor spends ages essentially
pressing buttons at random.
--
Roland Perry