| Comment | Oystercards are smart cards that you can load with credit and tap in and out of various public transport options (including the underground, buses, railways, etc) in London. Rather than being charged £X for the underground, then another £Y for the bus, and so on, you tap in and out and at the end of the day, it adds it all up and charges you, subject to a cap, and there's also a weekly cap. But you don't even need an Oystercard - you can do it with a contactless card or pay with your phone. |
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