The Post Office Railway, also known as Mail Rail, was a narrow gauge driverless private underground railway in London built by the Post Office to move mail between sorting offices. Inspired by the Chicago Tunnel Company, it was in operation from 1927 until 2003.
It ran east-west from Paddington Head District Sorting Office in the west to the Eastern Head District Sorting Office at Whitechapel in the east, a distance of 6.5 miles (10.5 km). It had eight stations, but by 2003 only three stations remained in use because the sorting offices above the other stations had been relocated.
A Royal Mail press release in April 2003 revealed that the system would be closed and "mothballed" (i.e. removed from active service) at the end of May that year. Royal Mail had earlier stated that using the Post Office Railway was five times more expensive than using road transport for the same task. The Communication Workers Union claimed the actual figure was closer to three times more expensive but argued that this was the result of a deliberate policy of running the system down and using it at only one-third of its capacity. Despite a report by the Greater London Authority in support of the continued use of Mail Rail, the system was taken out of use in the early hours of 31 May 2003.
Some of the former Mail Rail trains have now taken up residence at the Launceston Steam Railway [1].

Rolling stock

1926 Electric Locomotives — Original locomotives Electric locomotives

1927 Stock — Original stock
1930 & 1936 Stock — Replacement stock for 1927 Stock
1962 Stock — Prototype stock
1980 Stock — Replacement stock