sweek wrote:

Well you should simply get an Oyster, even as a tourist.

It's all very well to say that, but walking into a Tube station or
joining a bus it is *not* obvious. It is therefore a dishonest tourist
tax.

Why can't I buy a pre-credited Oyster from a machine, for example?
Ticket office queues are usually long, and most people won't find it
natural to buy a single ticket from a ticket office anyway - most
European metros don't even *have* ticket offices.

Neil