London on a budget: cheap food, stays and free sights

London is expensive mainly in two lines: your bed and your dinner. Fix those and the rest of the city is cheap or free. Sleep in zone 2–3 near a Tube line rather than in zone 1, eat one proper meal a day and fill the gaps with supermarket meal deals and market food, and use contactless pay-as-you-go with the daily cap instead of a paper travelcard.

The free national museums are the single biggest saving. The British Museum, National Gallery, Tate Modern, Natural History Museum, Science Museum and Victoria and Albert Museum cost nothing for the permanent collections; special exhibitions are ticketed. Add the South Bank walk, Hyde Park, Regent's Park, Hampstead Heath, Borough Market browsing and the Sky Garden (free, book ahead) and you can fill three days without paying an entry fee.

Use the country budget lines as your base and expect London to sit at the top of each band. A backpacker day of £63–130 covers a dorm bed, meal deals and pub food, buses and advance trains, and free museums. Mid-range at £160–300 covers a 3★ or chain hotel, a restaurant dinner, Tube and taxis, and one paid sight. Comfort starts around £355 and climbs fast.

Two rules save the most. First, book accommodation early: London beds run 40–80% above the rest of the UK, and the cheapest dorms and budget chains sell out weeks ahead in summer. Second, eat your main meal at lunch, when many restaurants charge less for similar food, and keep evenings to markets, takeaways or a pub.

Transport is capped, not metered by the day. Contactless payment on the Tube, bus and most rail within London gives you a daily cap, so a day of short rides costs less than the sum of single fares. Buses are the cheapest way to move and to sightsee: a single bus fare is well under a Tube ride in zone 1.

From outside the UK, the flight is the fixed cost and the one line you cannot trim much once booked. Fares from the US east coast, Canada, Ireland and western Europe are usually cheapest on midweek departures in January–March and November, and highest in July–August and around Christmas. Book 6–12 weeks ahead for the best balance of price and choice; last-minute summer fares are the worst value.

From within the UK, advance train tickets are the budget route. A long-distance advance single booked two to four weeks out is a fraction of the walk-up fare, and BritRail passes exist for visitors from outside the UK — compare them with advance tickets before buying. Coaches are slower and cheaper again for short hops.

Once you land, avoid the most expensive airport transfer. Heathrow and Gatwick both have trains and coaches into central London that cost far less than a taxi; contactless works on the Tube and most rail. If you arrive late, check the last train time before you book a bed far from your line.

Book the free Sky Garden and any popular museum exhibition online before you travel; walk-up slots go early. Many museums run free late openings one evening a week, which is a good way to see the big ones without the crowds.

For cheap eating, supermarkets, markets and takeaways beat restaurants on price every time, and London's markets are the best-value hot food in the city. Carry a refillable bottle: tap water is safe to drink in London and refill points are common.

Keep an eye on the small stuff. Pickpocketing happens in tourist areas and on crowded transport, so read up on the common tricks before you go. If you are travelling alone, hostels and free walking tours are the cheapest way to meet people. And if you are mainly here to shop, set a budget before you start — the sales are real, but so is the temptation.