London Transport Museum keeps 320,000 objects in a warehouse in Acton that is shut to the public almost all year. It opens for three days from Friday 25 September, and this one is themed around the roundel, the Tube map and the moquette.
The Covent Garden museum is the bit everyone knows. The Museum Depot in Acton Town is where everything that doesn’t fit goes: trains, buses, signalling gear, ticket machines, station signage, and one of the great poster collections anywhere in Britain. It opens to the public only a handful of times a year, and this is the last set of open days in 2026.
Why this one is worth the trip
Each open weekend gets a theme, and September’s is design classics, which is the Depot playing to its strongest hand. The museum is building the three days around the evolution of the roundel, the Underground map, moquette (the Tube seat fabric, and yes there is a quiz on identifying the patterns) and the vintage publicity posters.
It’s a good theme because these are the objects Londoners look at every day without ever quite looking at them. Seeing forty versions of the roundel lined up, or the map before Harry Beck got hold of it, rewires how you see your own commute.
What you can actually get on board
Plenty. The 1927 standard stock and 1938 stock trains are open to climb aboard, and RM1 and RM2, the first two Routemasters ever built, are there to get close to. The Q stock carriages are mid-restoration in the Rail Shed, with the team on hand to explain what they’re doing to them.
Elsewhere there’s rare signalling equipment with live demonstrations from the museum’s signalling volunteers, an object-handling trolley of ticket machines through the decades, and the models, maps and station architecture that make up the rest of the store.
Talks and demonstrations
Talks run on select days and times, delivered by curators, historians, TfL design experts and volunteers. The Piccadilly line’s architecture gets its own session, timed to the line’s 120th anniversary this year, alongside Art on the Underground and a strand on inclusive design. There’s a ten-minute history of the Underground for anyone short on patience, and a fifteen-minute Welcome to the Depot orientation talk worth catching first.
A nice one: Poems on the Underground turns 40, marked here with poetry from Young Leaders of the Anti-Tribalism Movement, a local community organisation.
If you’re bringing children
This is a genuinely good one for kids, and not in a token way. The miniature railway runs in the Depot yard on all three days. There’s a match-the-moquette quiz, a Design a Roundel workshop, and London 2126, a poster workshop where they design how the city gets around a century from now. Museum Young Volunteers run a drop-in creative space for making your own Tube map.
There’s also a SEND-friendly hour on the Saturday, one hour only, with fewer crowds and reduced noise for visitors with sensory needs. Worth booking around if that matters to you, and worth knowing it exists at all.
Food, drink and the shop
Benugo, Mini Bean Coffee, Crepe Salut and Well Nice Food are on site, and there’s live music out in the yard marking TfL’s busking scheme, which has been running since 2003. The Depot shop is the one place to get moquette-pattern socks, scarves and cushions, plus prints and genuine Tube station signs, and it is a more dangerous room than it sounds.
The London x London Take: the Depot is the best thing London Transport Museum does and it’s open a fraction of the year, so the calculation is simple: go while you can. £19 for a full day among 320,000 objects is good value on its own, but the real argument is that the collection is stored rather than curated, which means you get the unpolished version, racks and aisles and things stacked on things. If you live in Ealing or Hounslow, check the local resident concession before you book. Go on the Friday if you can, it’s the quietest of the three.
Need to know
- Where: London Transport Museum Depot, 118-120 Gunnersbury Lane, Acton Town, London W3 9BQ
- When: Friday 25 to Sunday 27 September 2026
- Price: £19 adults, £10 children, free for under-3s. Concessions available, including local resident tickets for Ealing and Hounslow
- Booking: in advance online, via ltmuseum.co.uk
- Nearest station: Acton Town
- Access: SEND-friendly hour on Saturday
Want the full picture first? Our guide to the secret Museum Depot in Acton goes round the collection properly, and London’s abandoned Tube stations is the natural next rabbit hole.
