In message , Ken
writes

I carry a book of Saver bus tickets to use when I run out of PAYG
credit. Has come in handy on several occasions. I can't use Auto
top-up as you have to 'charge' the card at an underground barrier and
I rarely use the Tube.

Only the first time to enable the facility. After that even buses can
do it.

If that doesn't help, they will send you a card already enabled for auto
top-up on request. Then you need do nothing other than make sure you
have a quid or two in your account for the update.
--
Steve Fitzgerald has now left the building.
You will find him in London's Docklands, E16, UK
(please use the reply to address for email)