Most suburban rail stations. 2. How to Purchase at a Ticket Machine Locate a yellow card reader on a ticket machine. Select "Get new cards" (or "Buy and Top Up"). Choose your initial top-up amount (e.g., £10–£20).
Tap on the yellow reader at the start and end of each journey (except on buses/trams, where you only tap in). how to buy oyster card london
At any London Underground station ticket machine (available at Heathrow , Gatwick , Stansted , and London City Airport stations). Most suburban rail stations