On Aug 21, 10:28 am, Uncle Dave wrote:

Ah, right, that's what I was wondering. OK, rather than top up on-
line I'll buy some credit at the ticket machine - I'm not expecting to
travel often enough to warrant auto top up.

In the event, I topped up online, but the options where you can
validate your top-up are limited and don't include buses. I chose the
underground at Waterloo which was where I arrived, went to the barrier
where the guy informed me that it probably wouldn't work and that the
barrier would open so I'd get charged for a journey. He was right so
I've now been charged for a journey I never made because I used the
bus.

I'm sure this works fine for millions of other people, but I think I
shall avoid it in future and pay as I go - it will probably work out
cheaper and certainly easier! Thanks for the advice and info.

Cheers

David