Mail was the passengerSourced
London had an underground railway for post
London’s Post Office Railway opened in 1927, using small driverless trains to move mail between sorting offices. Mail operations ended in 2003. In 2017, part of the route opened for museum passengers, replacing letters with visitors.
Beneath the commuting city, its mail had a route of its own.
Summary / translation: Unbubly · CC BY-SA 4.0
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London Post Office Railway · Wikimedia contributors
Adapted, summarized and translated from the source. Adapted text is also available under CC BY-SA 4.0.
Reviewed: 2026-10-10