Various dates and times / 15:00 - 18:30
Mail Rail at The Postal Museum
Booking required
£55 per person
For ages 12+ only
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Photo of a group walk through the abandoned underground tunnels of London's old Post Office Railway.

Group exploring the tunnels

We’re opening up the 100-year-old Mail Rail tunnels for exclusive underground walks that will allow you to discover one of London’s best-kept secrets. Get access to Mail Rail’s tunnels, tracks and platforms, exploring parts of the railway that aren’t accessible on the Mail Rail ride.

Expert guides tell the surprising stories about the staff who built, operated and maintained the underground railway over the course of 100 years – from its construction in the early 1900s, through the heyday in the middle of the century, to the eventual closure in 2003.

Visitors will need to wear a high visibility jacket and a hard hat for the walk. This protective equipment is mandatory.

Dates & times

Tunnel walks will take place at 15:00, 15:30, 18:00 and 18:30 on the following dates:

  • 6, 13 and 20 December (Christmas Tunnel Tours)
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*The Christmas Tunnel Walks follow the same route as a standard walk, but access a small section of the tunnels not usually on the walking route, to reveal a surprising festive scene.


The route involves walking on uneven ground in low-light conditions for around 1.2km (0.75 miles) including stepping across rails and up onto platform areas. For this reason, the walk is not accessible by wheelchair users and is not recommended for people with mobility impairments. Tunnel Walks are for ages 12+ only.

If you’re unsure if this event is suitable for you, please contact [email protected] before booking your tickets.

The walk is approximately 1.2km. You will be in the tunnels for approximately 1 hour and 15mins.

No, but visitors are welcome to wear a mask if they wish and we do recommend wearing a mask in enclosed indoor spaces.

Tickets are non-refundable once purchased unless the Museum cancels the tour due to a change in Government guidelines. In this case, you will be given the option to move your ticket to the next available date, donate the amount or receive a refund.

You will be able to take pictures at certain stopping points on the route and your guide will tell you when this is possible.

There will be toilets available at the start and end of your visit. There are no toilets throughout the duration of the walk.

The Postal Museum and Mail Rail exhibitions are closed when Tunnel Walks take place. We encourage interested visitors to come back and visit during open hours.