Which is better for a couple of days in London: topping up an oyster card or getting a travel card each day?

providing you touch in and out every journey, an oyster pay as you go will automatically cap as a travel card (depending on zones and time). using pay as you go works out fifty pence cheaper than a one day paper travel card. if you have any money left on your oyster card when you go home you can surrender your card and get your money back.