A rapid transit and light rail system in North East England, serving Newcastle upon Tyne, Gateshead, South Tyneside, North Tyneside and Sunderland in the Tyne and Wear region.
An underground light metro line in Glasgow. It is the third-oldest underground metro system in the world after the London Underground and the Budapest Metro, and the only underground metro system in the British Isles outside England.
The following are usually referred to as commuter rail systems, but possess aspects of rapid transit:
A suburban rail network in the United Kingdom, serving a large part of Greater London and parts of Hertfordshire. Contains the East London line, a former London Underground line.
A railway line in London and its environs constructed under the Crossrail project, providing a new east-west route across Greater London. It provides a high-frequency commuter/suburban passenger service linking parts of Berkshire and Buckinghamshire, via central London, to Essex and South East London, relieving the pressure on other railway services.
A commuter rail network, in the Liverpool City Region, England. The network has 68 stations running on 75 miles of route, of which 6.5 miles are underground, forming one of the most heavily used railway networks in the UK outside London.
^Indicates lines that are in operation for operational systems, lines that are under construction for under construction systems and proposed lines for proposed systems.
^Indicates stations that are in operation for operational systems, stations that are under construction for under construction systems and proposed stations for proposed systems.
^Indicates lines that are in operation for operational systems, lines that are under construction for under construction systems and proposed lines for proposed systems.
^Indicates stations that are in operation for operational systems, stations that are under construction for under construction systems and proposed stations for proposed systems.