Buy a Visitor Oyster cardVisitor Oyster cards are plastic smartcards you can use instead of paper tickets. Put on 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
You can travel as often as you like on bus, Tube, tram, DLR, London Overground and National Rail services within the London travel zones with a Travelcard. They are valid for either one or 7 days and are issued as paper tickets from the Visitor shop.