Contactless can't be used for monthly and annual travelcards, as well as concessions. Additionally the capping works slightly different, for example if you only

Contactless can't be used for monthly and annual travelcards, as well as concessions. Additionally the capping works slightly different, for example if you only use buses or trams they have a weekly cap that only works with Oyster. For most visitors, contactless will give the same prices as Oyster, and is a lot cheaper than paper tickets.