Liverpool
dead subway, LRT under construction

Lawd Have Mersey!

There is no subway in Liverpool, though a 3 line LRT, "Merseytram", was approved in December, 2002. There used to be an el (the Liverpool Overhead Railway) which included a subway at it's downtown terminus but that was, sadly, abandoned in 1956. There is a 5.8 mile Merseyside subway tunnel through which a 49 station, 51.5 mile commuter train network is run and is sometimes classified as a subway.

RailInfo's page on the proposed Merseyside Metro
Williamson's Tunnels
Liverpool Overhead Railway Page - Great stuff by Andy Gaskell
Car Number 7, one of the 2 surviving cars at the SERA in the UK

Books

17 Stations to Dingle - A History of the LOR

 Portrait of the Liverpool Overhead Railway - An Illustrated History by Adrian Jarvis