£13.55. That is a whole Saturday in central London: breakfast, three museums, lunch, a four-mile riverside walk and the best free view in the city, with no fare to pay because you walk the lot. It is roughly a third of the price of one adult ticket to the Tower of London, and about a seventh of what the Office for National Statistics says a front-stalls theatre seat costs here.
The whole £13.55 is food. Everything you look at on this day is free, and none of it is a consolation prize: two of the three collections are among the best in Europe, and the view is better than the one people pay £39 for. The trick is not frugality, it is geography. Central London's free institutions sit in a line along the river, so the day costs nothing to move around if you are willing to walk.
Our list of free things to do in London covers what else is on it. This page does one specific day, in order, with the prices, so you can see how a cheap day is actually assembled. For the same discipline applied out of town, the cheapest day trips from London uses the fare cap instead.
The day, costed
- Travel
- £0.00. About 6 km of walking across the whole day
- Breakfast
- £5.85: takeaway coffee and a hot savoury pastry, at London median prices
- Three museums and galleries
- £0.00
- Lunch
- £7.70: takeaway sandwich and a can, eaten by the river
- The view
- £0.00, booked free in advance
- Water
- £0.00 from a refill point
- Total
- £13.55 per adult
The food prices are the ONS medians for the London region in its August 2026 price collection: £3.60 for a takeaway hot drink, £2.25 for a hot savoury pastry, £5.25 for a chilled sandwich and £2.45 for a can. The ONS numbers its regions rather than naming them, and the region we have used is the one that is dearest on almost every item, which on British prices can only be London. That is our inference, not an ONS label.
Why a Saturday, and which Saturday
Three of the four places on this day have awkward opening patterns, and Saturday is the one day when all four line up.
| Place | Price | When it is open |
|---|---|---|
| Sir John Soane's Museum | Free | Wednesday to Sunday, 10:00 to 17:00. Closed Monday and Tuesday, open on bank holidays |
| National Gallery | Free | Daily 10:00 to 18:00, Friday until 21:00 |
| Tate Modern | Free | Sunday to Thursday 10:00 to 18:00, Friday and Saturday to 21:00 |
| Sky Garden | Free, timed ticket | Weekdays 10:00 to 18:00, weekends 11:00 to 21:00 |
On a Saturday both Tate Modern and Sky Garden stay open until 21:00, which means the day can end with a view at dusk instead of being cut short at six. A Wednesday works too and is much quieter, but then the Sky Garden slot has to be at about 16:00, and there are no walk-ins there after 17:00 on a weekday.
Book the Sky Garden the moment you know your dates. A Monday morning release puts a whole week of free slots on sale three weeks in advance, and the useful times are gone by that afternoon. Spare capacity does sometimes admit people at the door, but building a free day on that hope is how the day ends with a £39 alternative.
Photo: The wub · CC BY-SA 4.0 · Wikimedia Commons · resized
09:15, Holborn: breakfast bought in the right shop
Start where the first museum is, not where your hotel is, and buy breakfast at a bakery or a supermarket rather than at a station. The premium on anything sold to people passing through is roughly a pound an item, which on a £13.55 day is eight per cent of everything you will spend.
A takeaway coffee and a hot pastry is £5.85 at the London median. Ask for it to take away even if you sit outside, because VAT is zero on cold food carried out and 20 per cent on the same item consumed at a table, which is why the board sometimes shows two prices.
10:00, Lincoln's Inn Fields: the strangest free museum in London
Sir John Soane's Museum is the house of a Regency architect, kept as he left it, and it charges nothing and takes no bookings of any sort, which is rare enough in London to plan a day around. Small rooms mean there may be a queue at the door; there is never a ticket.
Give it an hour. It is the densest hour of looking on this whole day, and unlike the big national collections you can honestly see all of it. Then walk down Kingsway and the Strand to Trafalgar Square, which takes about twenty minutes and passes a good deal of London on the way.
11:30, Trafalgar Square: one wing, not the whole gallery
The National Gallery is free, donations welcome, with a free timed ticket available for fast-track entry and walk-up admission also possible. The Sainsbury Wing reopened in May 2025 and is now the main free entrance.
The mistake is trying to see it all. Ninety minutes in one or two rooms you have chosen in advance beats three hours of trudging, and the gallery has rooms closed for building works anyway. If the queue is long, the National Portrait Gallery is round the corner and also free.
If it is a Monday or Wednesday morning, put the Guard on the front of the day. The Changing of the Guard at Buckingham Palace is at 11:00 on Monday, Wednesday and Friday in September 2026, it is free to watch, and it is a fifteen-minute walk from Trafalgar Square through St James's Park. Check the Household Division's own calendar first, because the days move and some are missed.
13:00, the river: lunch that costs £7.70
Buy a sandwich and a drink and eat them on the wall at Victoria Embankment or on the South Bank. A takeaway sandwich at the London median is £5.25 and a can is £2.45. The same lunch bought sitting down in a museum cafe would come to about £14, and the same lunch sitting down in a restaurant, at the London median for a main course, £17.00.
Fill your water bottle rather than buying one. A bottle of mineral water has a London median of £3.00, and any licensed premises must give you tap water for nothing on request; the refill network is mapped. Two bottles a day across a four-day trip is a pub dinner.
14:00 to 16:00: the walk, which is the best part
Cross to the South Bank at Westminster or Waterloo Bridge and walk east. The stretch from the London Eye to Tower Bridge is continuous, level, riverside and free, and it passes more of London than any bus route. Cross back north over the Millennium Bridge for the view of St Paul's that the bridge was built to frame, and note that St Paul's itself charges £27.00 for sightseeing Monday to Saturday, so the outside is the free part.
Detour into Leadenhall Market on your way east through the City: the public areas are open around the clock and it costs nothing to walk through a Victorian market hall. Our guide to the Thames Path and London's walking routes has the longer versions of this walk.
16:00: Tate Modern, and then the view
Tate Modern is free for its permanent collection, with paid exhibitions on top, and on a Saturday it is open until 21:00. An hour in the Turbine Hall and two collection floors is plenty.
Then walk to Sky Garden at 20 Fenchurch Street for your booked slot. It is free, the slot lasts an hour, and the view from the top of the City across the river is the one most visitors pay for somewhere else. Under-16s are not admitted after 21:00 at weekends or 18:00 on weekdays, which matters if you are doing this with children.
What the same day costs if you make the obvious choices
| Same shape of day, different decisions | Cost |
|---|---|
| Our version: walk, shop food, free sights, booked free view | £13.55 |
| Add the Tube instead of walking | £22.45 |
| Two sit-down lunches' worth of food rather than shop food | £35.00 upwards |
| Swap the free view for a paid observation ticket bought on the day | £52.55 upwards |
| Swap one free museum for one flagship attraction | £50.55 upwards |
| End with a front-stalls theatre seat at the London median | £105.80 |
Every one of those is a single decision, and each one costs more than the entire original day. That is the real lesson of a cheap day in London: the city is not expensive, the defaults are.
What we would not economise on
- Shoes. Six kilometres on pavement in the wrong shoes turns the whole plan into a taxi fare.
- Waterproofs. Rain moves this day indoors and indoors is where the charging starts; the arithmetic is in what a rainy day costs.
- A proper evening meal. Saving four pounds on dinner after six kilometres of walking is a false economy.
- Checking opening days. Sir John Soane's shuts on Mondays and Tuesdays, and a locked door is the most expensive thing on a free day.
The same day with children, and on a Sunday
With children the day gets cheaper rather than dearer, because all three collections are free for everyone and under-11s travel free anyway if you do use the Tube. Two adults and two children walking this route spend about £40 on food at the median prices above and nothing else. The Sky Garden age rule is the only thing to plan around.
On a Sunday the shape changes in two places. Tate Modern closes at 18:00 rather than 21:00, and St Paul's is closed to sightseeing but holds services you may attend without charge, with its Dome Sundays ticket at £13.50 if you want the climb. The City is also almost empty on a Sunday, which makes the Leadenhall stretch better and the lunch options worse.
If you want a week of cheap lunches to build several of these days around, they are costed in a week of lunches in London. If your budget is a fixed daily figure rather than the minimum, see what fifty pounds buys, and for the three standard daily budgets, what a day in London costs. One free gallery to check before you set out for it: the Serpentine Galleries close between exhibitions, and there is no ticket desk to tell you.
Frequently asked questions
What is the cheapest day out in London?
A walking day between the free national collections, with food bought in shops rather than cafes. Our costed version comes to £13.55 per adult for breakfast, lunch, three museums, a four-mile riverside walk and a booked free view, with no transport fare at all.
Can you spend a day in London without paying for transport?
Yes, if you build the day along the river. Holborn to Trafalgar Square to the South Bank to the City is about six kilometres in total and passes three free collections and a free viewing gallery. A single bus fare of £1.85 covers the tired end of the day if you need it.
Is the Sky Garden really free?
Yes. There is no admission charge, on a timed ticket lasting an hour, between 10:00 and 18:00 on weekdays and between 11:00 and 21:00 at weekends. The tickets go on sale on Monday mornings for a week three weeks later, and spare capacity sometimes admits people at the door.
How much should I allow for food on a cheap day in London?
About £14 per adult using shop food: £5.85 for a takeaway coffee and pastry and £7.70 for a sandwich and a drink, at the ONS London median prices for August 2026. Eating both meals sitting down roughly trebles that.
Which day of the week is best for a free day in London?
Saturday, because Tate Modern and Sky Garden both stay open until 21:00 and Sir John Soane's Museum is open. A Wednesday is far quieter and works just as well if you move the view to the late afternoon. Avoid Monday and Tuesday, when Soane's is closed.
Sources
- Office for National Statistics - CPI and RPI item indices and price quotes, price quotes for August 2026 (checked September 2026)
- Sky Garden - free tickets, opening hours and ticket release (checked September 2026)
- Sir John Soane's Museum - your visit (checked September 2026)
- National Gallery - plan your visit (checked September 2026)
- Tate Modern - visit (checked September 2026)
- St Paul's Cathedral - ticket types and prices (checked September 2026)
- Household Division - Changing the Guard calendar (checked September 2026)
- Leadenhall Market - visiting information (checked September 2026)
- Transport for London - daily and weekly capping (checked September 2026)