London Oyster Card Transport Pass
Oyster Cards are electronic smart cards similar to those used in Australia that come fully charged with credit that can be used as you travel on the Tube, it can also be used on the bus network, Docklands Light Railway, London overground and the Thames river services. 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 ticket machine to use your card again.
Visitor Oyster cards are strangely enough designed particularly for visitors to London. The fare structure is the sames regardless of which type of Oyster card you buy. The main difference between Visitor Oyster Cards and oyster cards is that you cannot load a travel card onto a Visitor Oyster. The visitor oyster does sometimes have special offers including theatre tickets available to visitors. If you are travelling for 7 days or more then the normal Oyster Card is better value, The Visitor Oyster Card is better for shorter stays.