London's best attractions at the best prices

The Postal Museum

Five centuries of postal history brought to life — ride the hidden Mail Rail tunnels 70 feet beneath London's streets

Beneath the streets of Clerkenwell lies a secret railway that carried four million letters a day for 76 years. The Postal Museum opened in 2017 around this engineering marvel, letting visitors ride miniature trains through the original tunnels of the world's first driverless electric railway.

Above ground, five centuries of communication history unfold across interactive galleries. From the Penny Black to wartime propaganda, the collection spans over 400 years of innovation, scandal and social change that shaped how Britain talks to itself.

Area Clerkenwell
Price ££
Duration 2–3 hours
Best Time Weekday mornings

Highlights

Mail Rail Ride

Mail Rail Ride

Board a miniature train and rattle through original tunnels 70 feet below ground. The one-kilometre stretch passes platforms abandoned since 2003, with projected displays explaining how 22-hour shifts kept London's post moving at speed.

Postal Gallery Exhibitions

Postal Gallery Exhibitions

Interactive displays trace five centuries of postal history, from Tudor messenger routes to airmail innovation. Highlights include the original Penny Black printing plate, Victorian pillar box designs and propaganda posters from both world wars.

Sorted! Play Space

Sorted! Play Space

A hands-on area designed for under-eights where children can sort parcels, drive a mail van and dress up as postal workers. The space is included in the standard ticket and gives families a break between the galleries and Mail Rail.

Mount Pleasant History

Mount Pleasant History

The museum sits on the site of Mount Pleasant sorting office, once the largest in the world. Archive film and original equipment reveal how this single building processed millions of letters daily at the heart of the national network.

From Royal Messengers to Mail Rail

The story of Britain's postal service begins in 1516 when Henry VIII appointed a Master of the Posts to manage royal communications. By 1635 Charles I had opened the system to public use, and the modern postal network was born. The introduction of the Penny Black in 1840 transformed letter-writing from an expensive luxury into something any worker could afford, triggering a revolution in literacy and social connection.

By the early 20th century, London's streets were so congested that mail deliveries were falling behind schedule. In 1927 the Post Office opened its own underground railway — a 6.5-mile network of narrow-gauge tunnels running from Paddington to Whitechapel. Driverless electric trains carried sacks of mail beneath the traffic at speeds of up to 35 miles per hour, operating 22 hours a day with just a two-hour window for maintenance.

What to See and Do

The museum splits into two distinct experiences. Above ground, the postal galleries trace communication history through original artefacts, interactive displays and archive film. Standout objects include the Penny Black printing plate, a Victorian mail coach, propaganda posters and uniforms spanning two centuries. Temporary exhibitions rotate regularly, often exploring themes of design, social history and technology.

Below ground, Mail Rail is the main draw. Visitors board miniature trains at the original Mount Pleasant platform and ride through a one-kilometre stretch of tunnel, passing abandoned stations and projected displays that bring the railway's working life back to vivid detail. The ride lasts around 15 minutes and is included in every ticket. For families, the Sorted! play space lets younger children sort parcels, operate conveyor belts and dress up as postal workers.

Practical Tips and Nearby

The museum sits on Phoenix Place in Clerkenwell, a short walk from Farringdon and Chancery Lane stations. The on-site cafe serves light meals and drinks, and there is a gift shop stocked with postal-themed souvenirs and stamps. The building is fully accessible, with step-free access to all galleries and a wheelchair-accessible Mail Rail carriage available on request.

Clerkenwell itself is worth exploring after your visit. Exmouth Market, a two-minute walk away, has independent restaurants and street food stalls. The Museum of the Order of St John is just around the corner, and Smithfield Market — London's oldest meat market — lies a few streets south.

Did You Know?

  • Mail Rail operated for 76 years carrying up to four million letters a day, yet most Londoners had no idea a railway ran beneath their feet
  • The tunnels were used as secret storage for art from the Tate Gallery and the British Museum during the Second World War to protect them from bombing raids
  • At its peak the Post Office Underground Railway stretched 6.5 miles across London from Paddington to Whitechapel, serving eight major sorting offices along the route
  • The Penny Black, the world's first adhesive postage stamp issued in 1840, was the brainchild of Sir Rowland Hill and revolutionised communication by making postage affordable for everyone

Pricing

  • Adult £18.50
  • Young Person (16-24) £12.50
  • Child (2-15) £11.00
  • Under 2s Free

All tickets include one ride on Mail Rail and 12 months of unlimited return visits. Book online for a £1 discount. Carers enter free when accompanying a disabled visitor

Getting There

15-20 Phoenix Place, London WC1X 0DA

Tube: Farringdon station (Circle, Hammersmith & City, Metropolitan and Elizabeth lines) is a 10-minute walk. Chancery Lane (Central line) is also 10 minutes away. King's Cross St Pancras is 15 minutes on foot

Bus: Routes 19, 38 and 341 stop on Rosebery Avenue, a 3-minute walk from the museum entrance. Route 63 stops on Farringdon Road nearby

Walking: From King's Cross station, head south along Gray's Inn Road and turn right onto Phoenix Place. The walk takes around 15 minutes through Clerkenwell

Visitor Tips

Book Mail Rail slots early

Mail Rail has limited capacity and timed entry slots fill up quickly, especially during school holidays and weekends. Book online as far ahead as possible.

Visit on a weekday morning

The museum is quietest on Tuesday to Thursday mornings. You will have more space in the galleries and shorter queues for the Mail Rail ride during off-peak times.

Allow time for Sorted! play space

If visiting with young children, factor in at least 30 minutes for the Sorted! area. It is designed for under-eights and gives families a fun break between exhibits.

Grab lunch on Exmouth Market

Exmouth Market is a two-minute walk from the museum and has a wide range of independent restaurants, cafes and street food stalls. It is a better option than eating on site.

Check for Monday school holiday opening

The museum is normally closed on Mondays but opens during school holidays. Check the website before planning a Monday visit to confirm it is open on your chosen date.

Common Questions About The Postal Museum

Adult tickets cost £18.50, young persons (16-24) pay £12.50 and children (2-15) pay £11.00. Under twos enter free. All tickets include one ride on Mail Rail and 12 months of return visits.

Most visitors spend around 2 to 3 hours exploring the galleries and riding Mail Rail. Families with young children may want longer to use the Sorted! play space as well.

Yes, it is excellent for children. The Mail Rail ride is a highlight for all ages, and the Sorted! play space is designed for under-eights with hands-on postal activities.

Mail Rail is an underground railway that carried mail beneath London from 1927 to 2003. Visitors ride miniature trains through the original tunnels, passing abandoned platforms and projected displays.
James Whitfield

James Whitfield

EDITORIAL REVIEW

London Travel Writer · 12+ years covering UK attractions and tourism

Last reviewed: March 9, 2026

Visit

  • 15-20 Phoenix Place, London WC1X 0DA
  • +44 300 030 0700
  • Mon Closed
    Tue–Sun 10:00–17:00
  • www.postalmuseum.org

Discover More

Discover more attractions and things to do in London.

Browse All Attractions

Museums & Galleries

More Museums & Galleries

All Museums & Galleries
British Museum Free

British Museum

World-famous collection of art and antiquities spanning two million years of history

free Bloomsbury