Royal Mail Photography

The Post Office Railway, known as Mail Rail since 1987, is a 2 ft (610 mm) narrow gauge, driverless underground railway in London that was built by the Post Office with assistance from the Underground Electric Railways Company of London, to move mail between sorting offices. Inspired by the Chicago Tunnel Company, it operated from 1927 until 2003.

Royal Mail Rail Car at Museum

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The Post Office Railway, known as Mail Rail since 1987, is a 2 ft (610 mm) narrow gauge, driverless underground railway in London that was built by the Post Office with assistance from the Underground Electric Railways Company of London, to move mail between sorting offices. Inspired by the Chicago Tunnel Company, it operated from 1927 until 2003.