We highlighted London’s love affair with the Oyster card.
To simplify things for short-term visitors, there are also two Oyster cards specifically intended for tourists—a one-day card and a three-day card. The Oyster card for Visitors gives cardholders nearly 50% off all cash fares around London on tube, tram, bus, and Docklands Light Railway. Although you have to register your details to get an Oyster card—this part is too Big Brother for us; we suggest you register as “John Doe” if you don’t want Transport for London knowing your every move—it’s worth it for the savings.
With an Oyster card, you’ll pay £1 for bus fares and between £2 and £2.20 for Tube rides, a fraction of what you’d otherwise spend. The beauty of it is you can now snag an Oyster card for Visitors before you even get into London. A new partnership with Gatwick Express allows visitors to buy cards on the train from Gatwick on your way into town. For more information, poke around the Transport for London site.