In addition, hundreds of newsagents and shops in london can act as oyster ticket stops, allowing you to buy or refill a car. Transport for london (tfl) even has an oyster ticket stop locator on their website : [title] Oyster cards have a £ 5, non-refundable activation fee that is due at the time of purchase of a new card.
[header] How to use an oyster card [title] Purchase your oyster card. [step] You can purchase an oyster card in a number of places across london. All tube, london overground, and tfl rail stations have them available.