Visitor Oyster cards are plastic smartcards you can use instead of paper tickets. You top up the card with pay as you go credit which you use when you travel. It is the cheapest way to pay for single journeys on bus, Tube, tram, DLR, London Overground and most National Rail services in London.
Visitor Oyster cards can be reused and never expire. If you run out of pay as you go credit, simply top up your credit at a Tube station, Oyster Ticket Stop or Travel Information Centre to use your card again.
You can also use your Visitor Oyster card to get discounted fares on some TfL River Services and the Emirates Air Line cable car.