The Mail Rail is a activity that is located in London. The activity is a small train that purpose was to transport mail and runs underground the streets of London. It is also located just over from the Postal Museum the railway is over 100 years old.
The activity entails a ride around in a little train trough old unchanged stations platforms. Where you can learn how they lived their lives and kept the London mail service going for 22 hours a day.
They also do audio/visual shows that showcase how it was like in the 1930s. A second experience you get is with their interactive exhibits tat let you sort mail and shows you how the inventions that made it all come together came about.
they have a set of rules you have to follow that you can find on their website but here is a two of them
Also you can also find the accessibility on the website as their are limitations that you need to consider such as its not for people who struggle with claustrophobia. This is because the train itself was originally made for the mail service not for people.
You can check out the mail rail website using using this link
It is approximately 15 minutes long.