Rapid transit in the United Kingdom consists of four systems: the London Underground and the Docklands Light Railway in London; the Tyne and Wear Metro in Tyne and Wear; and the Glasgow Subway.
Rapid transit has also been proposed in other UK cities including Sheffield, Manchester, Leeds, Birmingham, Cardiff, Bristol, and Cambridge.
From 1893 to 1956, the Liverpool Overhead Railway was the only elevated rapid transit in the country, however fell into disuse being demolished in 1957.
In the 20th and 21st century, the United Kingdom has chosen to not prioritise investment in rapid transit schemes; instead cities like Manchester, Sheffield, and Edinburgh have opted for trams.
The following are usually referred to as commuter rail systems, but possess aspects of rapid transit: