In London you can use a contactless (UK) bank card, and it works just like the "Osyter Card". I think that started around 2016. For journeys on the TFL network

In London you can use a contactless (UK) bank card, and it works just like the "Osyter Card". I think that started around 2016. For journeys on the TFL network you should get billed the lowest fare, as long as you touch at the right points when changing.