Robin wrote:

Andy Burns wrote:

I thought TFL would charge you the lesser of the sum of individual
journeys you made, or a one day travelcard that encompassed the zones
you'd been in?

Nowadays the Oyster/contactless PAYG cap is usually less than the cost
of a Travelcard - and also avoids the need to decide in advance the
zones you need to cover.

Thanks, I never used oyster before you could use bank cards with it, but
did remember hearing that it should "play fair" and charge you the
minimum for all your journeys, I've never actually checked up on what it
did charge me on the rare occasions I've used it.