Anonymous wrote:You could get an oyster card and use the double decker buses. There's a daily cap, so after that you can on and off for no extra charge, or you can pay as you go up to that cap. You can also use it on the underground.
We bought ours at a corner store. You can either keep the card forever or turn it in at the end to get back the card deposit I believe.
https://en.m.wikipedia.org/wiki/Oyster_card
Oyster card not really needed anymore for adults, because you can pay with contactless cards/Apple or Google Pay. The 5 pound fee is no longer refundable, so it's not worth buying one.
It is good for kids ages 11-15 though, as you can buy them an Oyster card, and then have an Underground employee add a young visitor discount to the card and get half off all rides.
https://www.londontoolkit.com/briefing/london_transport_child_fares.htm#discount
You still have to add funds to the Oyster cards at machines, so that adds a bit of time, and means you have to try and make a "best guess" at some point to try and end up with as little left as possible on the card. You can get a cash refund at a fare machine of the remaining funds on the card, but not the 5 pound original cost.