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Mayor of London


Oyster is a smartcard which can hold pay as you go credit, Travelcard and Bus & Tram Pass season tickets. Use it to travel on bus, Tube, Tram, DLR, London Overground and most National Rail services in London.

Avoid card clash

If you keep your Oyster card in your wallet/purse with your bank cards, you might occasionally see a red light when you touch it on a card reader at stations and on buses. The red light means you haven't paid for your journey and if you're at a ticket gate, it might not open. This can happen even you've got enough pay as you go credit or a valid Travelcard on your Oyster card because you could be experiencing 'card clash'.

How to avoid card clash.

Warning over Oyster deals
Advertisements from a business using the name Hot Crazy Deals have recently been appearing on social media, and other websites offering discounts and deals on Oyster travel. We are aware of concerns having been raised by some consumers about these deals. We do not enter into arrangements with third parties and any discounts or deals are not sanctioned or approved by TfL.