Various dates / 15:00 - 18:30
Mail Rail at The Postal Museum
Booking required
£55 per person
For ages 12+ only
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 will 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.

Dates & times

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

  • 4, 11, 18 and 25 January
  • 22 February
  • 1, 8, 22 and 29 March
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Access Information

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.

How long is the walk?

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

Do I have to wear a face covering? 

Yes, you must wear a face covering during your visit.

Can I cancel my ticket if I change my mind? 

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.

Can I take pictures?  

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

Will there be toilets available? 

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

Can I visit the museum with people outside my household?

Yes, you can visit with people outside your household/ bubble.

Will I need to provide a vaccine passport?

The museum is not currently required by Government to introduce vaccine passports for entry, due to its size.

Safety measures

Hand washing

You will be asked to wash your hands on arrival and exit using the hand sanitiser provided.

Face covering

Cover coughs and sneezes and use a face covering.


You will be asked to stay 1-2 metres apart from those not in your household throughout the walk. There will be markers on the floor in the tunnels to remind you to keep your distance.


Book online before your visit. Onsite we are taking contactless payments only.


All equipment is cleaned before use and quarantined for 72 hours after its previous use.


Listen to the museum hosts, they’re here to help. There are 10 people per tour plus two guides.


You will be asked to wear a high visibility jacket and a hard hat for the walk. This protective equipment is mandatory.