Britain is a contactless country
Card payment is accepted virtually everywhere, including for very small amounts. Buying a single coffee, a newspaper or a bus fare by tapping a card or a phone is entirely normal and nobody will react. A significant and growing number of venues, particularly in central London, are card only and will not take cash at all.
Contactless works with foreign-issued cards and with phone wallets. Above a certain value you will be asked for a PIN or biometric confirmation, and a phone wallet usually has no upper limit because it authenticates every transaction. Practically, that means adding your card to your phone before you travel is the single most useful preparation you can do.
Do you need cash at all?
You can complete a week in London without touching a banknote. That said, a modest amount is still worth having. Some independent market stalls, a few small cafes, some places of worship, tips in cash where you prefer it, and the occasional older taxi still expect it. Fifty pounds in mixed notes is plenty for most trips.
Where you get it matters more than how much. Airport bureaux offer the worst rates you will encounter. A bank ATM in the terminal or in town is far better. Wherever you withdraw, decline any offer to be charged in your home currency, because dynamic currency conversion is a poor exchange rate dressed up as a convenience. Always choose to be charged in pounds.
Scotland and Northern Ireland issue their own banknotes. They are valid, but some shops in England are unfamiliar with them, so if you are travelling around Britain it is worth spending them locally rather than carrying them south.
Paying for transport
London's public transport does not require a local card or a ticket. Tap in and out with any contactless bank card or phone wallet on the Underground, buses, trams, the Overground, the Elizabeth line and most National Rail services within London. The system automatically caps what you are charged over a day and a week, so you cannot overpay by tapping too often.
Two things to know. Use the same card or device for every tap in a journey, because switching between a card and a phone mid-journey breaks the pairing and can produce a maximum fare. And each traveller needs their own card, since you cannot tap two people through on one.
Buses do not accept cash at all. If you have only notes, you cannot board.
Getting your phone working
eSIM is usually the right answer
If your handset supports it, an eSIM bought before you fly is the least painful option. You install it while you still have wifi at home, activate it on landing, and skip the queue at the airport kiosk entirely. It also lets you keep your home number active for verification codes, which matters more than people expect when banks start texting.
Physical SIM
Prepaid SIM cards are sold at airport shops and in supermarkets and phone shops everywhere. They are usually cheaper than airport eSIM prices but require you to be somewhere that sells them, which is inconvenient at 05:30.
Roaming
Check what your existing plan charges before you rely on it. Some plans include the UK, many do not, and post-Brexit arrangements for European visitors vary by provider. Non-European visitors should assume roaming is expensive unless they have confirmed otherwise.
Download offline maps of London before you fly and screenshot your accommodation address and booking references. It costs nothing and it covers the gap between landing and getting data working.
Small things that make the first day easier
Tell your bank you are travelling if it still requires that, since a declined card in an arrivals hall is a bad start. Carry one backup card kept separately from your main one. Know that tipping is modest here and never obligatory, roughly ten per cent in a restaurant if service is not already included, and rounding up for a driver. Public toilets at stations sometimes charge a small amount by card. And plug adapters are type G with three rectangular pins, which is not the same as anywhere else in Europe.
Paying for your airport transfer
A prebooked transfer sidesteps the whole problem, because the fare is agreed and settled before you arrive and you do not need working data, local currency or a functioning card at the kerb. It also removes the negotiation that touts rely on. Rushxo quotes a fixed price at the point of booking with no surge and no night rate, and you can arrange it by phone on +44 20 8888 9988, on WhatsApp at +44 20 8888 9988, or by email at support@rushxo.com before you leave home.