Best free things to do in London this week: 15 to 21 June 2026

One thing London does better than almost any other city is layer enough genuinely free programming across a single week that you could fill a long weekend without paying for entry to anything. This week in particular, 15 to 21 June 2026, two of the year's marquee free events both land on Saturday and Sunday: West End LIVE returns to Trafalgar Square for two full days of musical theatre, and the new Serpentine Pavilion in Kensington Gardens is fully open for free walk-up. Father's Day weekend lands on the summer solstice, the parks are at their peak, and the always-free national museums have been quietly hanging some of the strongest shows of the year.

This is the weekly free guide from tickadoo, the booking platform built by the founders of London Theatre Direct. We sell tickets for a living, so when we tell you something is free, we mean genuinely free, walk-up, no email signup required. Anything that needs a free booking we have flagged below; anything that does not we have flagged too.

West End LIVE returns to Trafalgar Square

The big one. West End LIVE 2026 rolls into Trafalgar Square on Saturday 20 and Sunday 21 June, with the organisers (the Society of London Theatre and Westminster City Council) describing it as Europe's largest free musical theatre festival. More than 50 of London's musicals send their casts to perform full headline numbers on the main stage across the two days, plus interviews with the cast and creatives between sets. It is free, you walk up, and the only ticketed element is the small accessible viewing area, which has a separate free registration.

It is the rare event that genuinely warrants going to both days. The Saturday running order tends to be heavier on the long-runners; Sunday gets the newer productions. Either way the trick is to arrive an hour before your priority slot and treat it like a festival, not a queue: claim a corner, pack a flask, and let the songs come to you. For who is performing when, we keep the full lineup updated at West End LIVE 2026: the full free lineup and how to book the shows you love.

The Serpentine Pavilion 2026 in Kensington Gardens

The 2026 Serpentine Pavilion, called "a serpentine", was designed by Mexico City practice LANZA Atelier (Isabel Abascal and Alessandro Arienzo) and opened on 6 June. It sits on the lawn outside Serpentine South gallery, between the Long Water and Kensington Palace. Open daily, 10am to 6pm Monday to Friday and 10am to 7pm Saturday and Sunday, until 25 October. It is free, walk-up, no ticket. The Pavilion programme has been a fixture of Kensington Gardens since 2000 and a different practice gets the commission every year; the structure is half pavilion, half museum object, and inside it usually doubles as a free events venue across the summer.

The walk pairs perfectly with a hike across Hyde Park to the V&A or the Natural History Museum, both five minutes from the Pavilion on foot. If you want a small paid moment to anchor the morning, the Kensington Palace ticket sits at £24.70 on this week's live pricing (rated 4.5 out of 5), and the palace's gardens are free without one.

The London Festival of Architecture, mostly free across the whole month

The London Festival of Architecture 2026 runs 1 to 30 June, with this year's theme being "Belonging" and more than 400 events across 11 designated areas of London (Bankside, Battersea, the City, Clerkenwell, Croydon, the West End, etc.). The festival's official line is that most events are free to attend, though many require a free booking through the LFA website because venues have capacity limits. It is the easiest way to dip into the city's architecture scene without committing to a single museum afternoon.

Highlights to look for this week: free building tours, free pavilion installations, free architect talks at the major studios, and the special public openings of normally closed buildings around the City and Bankside. The festival's online calendar lets you filter by date and area, which is the move if you only have one afternoon free.

Toy Story 5: The Experience, the family freebie that closes this Sunday

If you are reading this with kids, write the date down: Toy Story 5: The Experience at Westfield London (Level 0, The Atrium) closes on Sunday 21 June. It has been running since 11 June and admission is free, no tickets, no registration, walk up. Hours are noon to 8pm Monday to Saturday and noon to 6pm Sunday. Queue times have hit an hour at peak, so go on a weekday afternoon or on Sunday around opening time. As Father's Day weekend closer, it is hard to beat for under £30 (about the price of a Westfield lunch).

If Westfield is too far west, the always-free London Transport Museum in Covent Garden is the obvious central swap (entry is ticketed at £27, but the museum runs free family activities most weekends and the platforms in front are free to wander). Or take the kids to the Natural History Museum in South Kensington, which is free and open 10am to 5.50pm every day this week.

The always-free national museums, with the genuinely strong June 2026 shows

Eleven of London's biggest museums are free for general admission, every day this week, every year. The British Museum, Tate Modern, Tate Britain, the National Gallery, the National Portrait Gallery (permanent collection), the V&A, the Natural History Museum, the Science Museum, the Wallace Collection, the Imperial War Museum and Sir John Soane's Museum all open without a ticket. Some big special exhibitions inside them are paid: at Tate Modern the new Julio Le Parc retrospective is £15 (free for members), at the National Portrait Gallery the centenary Marilyn Monroe show is £25 to £30, at the Royal Academy the Summer Exhibition opens 16 June at £23.50 to £25.50. But the permanent collections that surround those paid rooms are themselves free, and they are some of the strongest free hours in any European city.

The contrarian pick this week, if you want a single quiet hour in central London, is Sir John Soane's Museum at 13 Lincoln's Inn Fields. Free, ticketed by time slot (you book a free slot online), open Wed to Sun. The townhouse was the home of the architect Sir John Soane and is still arranged the way he left it, every wall stacked with sculpture and bookshelves. It is closer to a Wes Anderson set than a museum and you can do the whole house in 90 minutes.

Outdoor London at peak: parks, markets, river

This is the best week of the year to use London's parks. The Royal Parks (Hyde Park, Kensington Gardens, Regent's Park, St James's Park, Green Park, Greenwich Park, Bushy Park, Richmond Park) are all free, all year. The standouts this week:

Greenwich Park. Free to wander, with the best free skyline in London from the General Wolfe statue at the top of the hill. Add the Royal Observatory at the summit if you want the indoor visit (£24 on this week's live pricing); skip the ticket and the view is still the view.

Hampstead Heath. Free, especially good for late-evening swims in the men's, women's and mixed ponds (a modest donation is requested but enforcement is loose). The Heath holds the summer solstice well; Parliament Hill at sunset on Sunday 21 June is a strong free Father's Day move.

Richmond Park. Free, and Britain's largest urban park, with red deer and fallow deer roaming. It is properly remote-feeling in a way the central parks are not.

Borough Market and Maltby Street Market. Free to walk, less free to eat. Borough is open Mon to Sat; Maltby Street runs Saturday and Sunday in summer. The trick is to graze your way through both rather than commit to one stall.

Southbank Centre, the Royal Festival Hall foyer. Always-free music sessions, free pianos people can play, free exhibitions in the Royal Festival Hall foyer and the Hayward Gallery's free public spaces. Open daily, walk up.

Free Father's Day weekend, end to end

If Father's Day is the framing and the budget is zero, here is the run we would do.

Saturday 20 June. Late breakfast in Borough. Cross the Millennium Bridge to St Paul's (the cathedral entry is paid at £27, but the dome and the steps outside are free). Walk to Trafalgar Square for West End LIVE from late morning. Lunch in St Martin's Lane. Afternoon at the National Gallery (free) or the National Portrait Gallery permanent collection (free). Evening: a long sunset walk through Hyde Park to the Serpentine Pavilion at dusk.

Sunday 21 June, summer solstice. Brunch somewhere with a view. Greenwich for the morning (free park, optional Observatory upgrade). Back to the city by river to catch the last day of West End LIVE in Trafalgar Square (Sundays are quieter than Saturdays). Late afternoon: a free Sir John Soane's slot if you booked one, or the V&A's main galleries. Evening: Parliament Hill or Primrose Hill for the longest sunset of the year, which lands at around 9.21pm.

Total spend across both days: train fare, two meals and a coffee, plus anything you upgrade. Zero pounds on entry.

The honest paid upgrades alongside the free anchors

If after the free run you want one paid moment, the strongest live ratings on tickadoo this week sit with The View from The Shard at £19 (rated 4.8 out of 5 from 1,973 reviews) and Frameless the immersive art experience at Marble Arch at £29.51 (rated 4.7 from 1,771 reviews). Both pair naturally with a free morning of museums and parks. Our London's hidden gems guide tells the longer story behind both.

For visitors travelling as a couple or a family who want a single membership to pull everything together, the tickadoo+ membership stacks on top of the free anchors so the paid moments come in lower. It is not the right move for one-day visitors; it is the right move for a long Father's Day weekend.

Frequently asked questions

Is West End LIVE 2026 actually free?
Yes. General admission to West End LIVE in Trafalgar Square on Saturday 20 and Sunday 21 June is free and walk-up. The only ticketed element is the small accessible viewing area, which has a separate free registration.

Do I need to book a free ticket for the Serpentine Pavilion?
No. The 2026 Serpentine Pavilion is fully open walk-up: 10am to 6pm Monday to Friday and 10am to 7pm Saturday and Sunday, on the lawn outside Serpentine South gallery in Kensington Gardens. It runs until 25 October.

Are the special exhibitions inside the free museums free too?
General admission to the British Museum, Tate Modern, Tate Britain, the National Gallery, the V&A, the Natural History Museum and the Science Museum is always free. Their big special exhibitions are typically paid: the Marilyn Monroe show at the National Portrait Gallery is £25 to £30; the Julio Le Parc at Tate Modern is £15; the Summer Exhibition at the Royal Academy is £23.50 to £25.50. The permanent collections are free.

Is the Toy Story 5 Experience really free?
Yes, and it closes on Sunday 21 June. Walk up to Level 0, The Atrium at Westfield London. No tickets, no registration. Hours are noon to 8pm Mon to Sat and noon to 6pm on Sunday. Queue times can hit an hour at peak.

What free outdoor Father's Day options are there for Sunday 21 June?
The full set: West End LIVE for musical fathers, the Serpentine Pavilion in Kensington Gardens, Greenwich Park and the free skyline from the Royal Observatory hill, Hampstead Heath and Parliament Hill for the solstice sunset, and a long Thames walk from Westminster to Tower Bridge. None of those cost a penny.

How do I find more free London events through the year?
We update the seasonal free guides weekly, and our London's hidden gems guide goes deeper on the less-obvious always-free spots. For the rest of the week's slate, see our what is on in London 15 to 21 June overview.

What free events should I queue early for?
West End LIVE in Trafalgar Square is by some margin the biggest draw of the weekend. The main stage area fills from about 10am on Saturday, so arrive by 9.30 if you want to be in the front rows. The Sunday is slightly less busy than the Saturday but still ahead of capacity by lunchtime.

Plan the rest of your week

The other three free-adjacent guides for this week sit at what is on in London 15 to 21 June (the full overview), West End Insider for 15 to 21 June (the paid theatre slate, with West End LIVE as the free anchor) and best things to do with kids in London this week (the family weekend handbook). The longer-read evergreen sister piece is London in 24 hours: the ultimate one day itinerary, which builds a similar free-first run plan you can apply to any weekend.

See the full London hub on tickadoo.com/london. We are tickadoo, the booking platform built by the founders of London Theatre Direct, and we will be back next Monday with the next free run.