This is a list of extant tramway and light rail systems in the United Kingdom. For a full historical list of all tramway systems that have existed in the country, see List of town tramway systems in the United Kingdom.

Operating systems

Blackpool

Edinburgh

South London

East London

Manchester

Nottingham

Sheffield

Tyne and Wear

West Midlands

Operational tram (green) and light rail (blue) systems in the United Kingdom

Systems under construction

• Coventry Very Light Rail – The Coventry Very Light Rail is a planned system of four lines around the city of Coventry. The first line to University Hospital Coventry is planned to open late 2023, or early 2024. The first tram vehicle left the construction line in late March 2021, and was taken on a showcase in the city, before being taken to Dudley for testing.

• South Wales Metro – Four light rapid transit lines are opening in the Welsh Capital of Cardiff as part of the current "Metro" plan Phase 1 in 2023, which will reach as far out of the capital as Hirwaun, a town 31 miles (50 km) from Cardiff Bay, as well as three new lines planned to open by 2026.

Proposed systems

• KenEx Tram – Thames crossing between Kent and Essex^[6]
• Wirral Street Car
• Bristol underground metro
• HERT (Hertfordshire and Essex Rapid Transit)^[7]

Cancelled systems

• Bristol Supertram
• CITI Belfast
• Cross River Tram
• East London Transit – built as bus rapid transit
• Leeds Supertram
• Merseytram
• Penistone Line Tram-Train
• South Hampshire Rapid Transit
• Thames Gateway Transit
• West London Tram
• Tees Valley Metro