On Fri, 27 Jan 2006 00:05:26 +0000, Laurence Payne
wrote:


Can't you top up online as well?

Sure. But to collect the top-up you have to touch at a nominated
Underground station. Why not do it automatically?

Because the data is on your card. Otherwise, every time you touched
in on a 'bus, the system would have to interrogate a central database
to see if you had credit.