Railway Technical Info - Great Britain

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System	Track	Route	Electrification	Comment
heavy rail, north of London	standard	LH	25kV 50Hz AC overhead
heavy rail, south of London	standard	LH	750V DC 3rd rail

Other electrification systems, now abandoned

1200V DC 3rd rail: Manchester Victoria – Bury (line transferred to Manchester tram system and converted to 750V DC overhead)
1500V DC overhead: London Liverpool Street – Shenfield (converted to 25kV AC); Manchester – Woodhead – Sheffield and branches (lines closed or converted to 25kV AC)
6.6kV 25Hz AC overhead: Lancaster Green Ayre – Morecambe – Heysham (converted to 50Hz)
6.6kV 50Hz AC overhead: Lancaster Green Ayre – Morecambe – Heysham (lines closed or de-electrified)

System	Track	Route	Electrification
London Underground	standard	LH	660V DC 4th rail
Docklands Light Railway	standard	LH	750V DC 3rd rail bottom contact
Croydon area: trams	standard	LH, stubs	750V DC overhead

System	Track	Route	Electrification
Birmingham: trams	standard	LH, stubs	750V DC overhead
Nottingham: trams	standard	LH, stubs	750V DC overhead
Sheffield: trams	standard	LH, stubs	750V DC overhead
Manchester: trams	standard	LH, stubs	750V DC overhead
Liverpool: suburban heavy rail	standard	LH	750V DC 3rd rail
Blackpool: trams	standard	LH, circles	660V DC overhead
Tyne & Wear Metro	standard	LH	1500V DC overhead
Edinburgh: trams	standard	LH	750V DC overhead
Glasgow Underground	4' (1220mm)	LH	600V DC 3rd rail