This is a list of railway lines in Great Britain that are currently in operation, split by country, with England also split by region.

There are a limited number of main inter-regional lines, with all but one entering Greater London. The line from London to the Channel Tunnel is the only line designated 'high speed', although the other main routes also operate limited-stop express services.

The bulk of the secondary network is concentrated in London and the surrounding East and South East regions; an area marketed by National Rail as London and the South East. The majority of these lines are radial to London. There is a further concentration of routes around Birmingham in the West Midlands and in the urbanised part of northern England that stretches from Liverpool in the west, via Greater Manchester to Leeds in the east.

Some areas, such as Wales and Scotland, have relatively sparse railway provision. There are local lines throughout all areas of Great Britain with some services designated as community railways.

England

London

This is a list of routes entirely contained within Greater London.

Name Route, or previous name Opened Regions Electrified Acton–Northolt line formerly "New North Main Line" 1903 London Bromley North Line to 1878 London Catford Loop Line to 1892 London Chessington branch line to 1938–1939 London Chingford branch line to 1873 London OHLE, Crystal Palace line Balham Junction to 1856–1858 London Dudding Hill line to 1875 London East London line to 1869–2010 London Gospel Oak to Barking line 1894–1868 London OHLE, (partial) Greenford branch line GWML to 1903 London Greenwich line North Kent East junction to Charlton Junction 1836 London Greenwich Park branch line to 1929 London Hayes line to 1857–1882 London Holborn Viaduct–Herne Hill line 1863–1866 London Hounslow Loop line Barnes Junction to Feltham Junction 1850 London Kingston loop line to 1863–1869 London North London line to 1846–1869 London Northern City Line to 1904 London Romford–Upminster line 1893 London OHLE, South London line to 1886 London Sutton Loop Line Streatham South Junction to 1864-1929 London West London line to 1844 London

Terminus Name End and major calling points Countries and regions Category Chiltern Main Line London, High Wycombe, Bicester, Banbury, Leamington Spa, Solihull, Birmingham England: London, South East, West Midlands Main Line East Coast Main Line London, Leeds, York, Newcastle, Edinburgh England: East, East Midlands, London, North East, Yorkshire and the Humber; Scotland High Speed Main Line Great Eastern Main Line London, Ipswich, Norwich England: East, London Main Line Great Western Main Line London, Bristol England: London, South East, South West High Speed Main Line High Speed 1 London, Channel Tunnel England: East, London, South East. Continental Europe: France, Belgium, Netherlands, Germany High Speed Line Midland Main Line London, Leicester, Nottingham, Sheffield England: East, East Midlands, London, Yorkshire and the Humber High Speed Main Line South West Main Line London, Southampton, Bournemouth, Weymouth England: London, South East, South West Main Line West Coast Main Line London, Glasgow with spurs to Birmingham, Liverpool, Manchester, Holyhead and Edinburgh England: London, North West, South East, West Midlands; Scotland; North Wales High Speed Main Line

South East England

This is a list of all routes that enter the South East England region.

Name Route, or previous name Opened Regions Electrified Alton line to 1852 South East Arun Valley line to 1848–1863 South East Ascot–Ash Vale line 1864–1878 South East Ashford–Ramsgate line 1846 South East Aylesbury–Princes Risborough line 1863 South East Bexleyheath line to 1895 London, South East Brighton Main Line and to 1839–1941 London, South East Caterham line to 1856 London, South East Chatham Main Line to and 1858–1926 London, South East Chertsey branch line to 1849 South East Cherwell Valley line to 1844–1873 South East Chiltern Main Line to 1852–1910 London, South East, West Midlands Cotswold Line to 1851–1860 South East, South West, West Midlands Darent Valley line to 1862 South East Dartford Loop Line to 1866 London, South East East Coastway line / to 1846–1871 South East Eastleigh–Fareham line 1841 South East Eastleigh–Romsey line 1847 South East East West Rail to 2024 South East England Not initially Elizabeth line , and to and 2022 East, London, South East Epsom Downs Branch to 1865 London, South East Hampton Court branch line SWML to 1849 South East Hastings line to 1845–1852 South East Henley branch line to 1857 South East High Speed 1 London to Channel Tunnel 2003–2007 London, South East OHLE, Island Line to (Isle of Wight) 1864 South East Kent Coast line Minster East Jn to Buckland Jn 1847 South East Kent Downs line to 1874–1884 South East London–Aylesbury line 1868 and 1899 London, East Fourth rail, (partial) Lymington branch line SWML to 1858 South East Marlow branch line to 1854 South East Marshlink line to 1851 South East Marston Vale line to 1845 East, South East Medway Valley line to 1844–1856 South East New Guildford line to 1885 South East North Downs Line to 1849 South East (partial) North Kent Line London to 1846–1849 London, South East Oxford–Bicester line 1850 South East Oxted line to or 1858–1888 London, South East (Croydon–East Grinstead) Portsmouth Direct line to 1845–1858 South East Portsmouth line to 1847–1868 South East Reading–Basingstoke line 1848 South East Reading–Taunton line 1847–1906 South East, South West Redhill–Tonbridge line 1884 South East Seaford branch line to 1864 South East Sheerness line to 1860 South East Shepperton branch line Kingston Loop to 1864–1894 London, South East Slough–Windsor & Eton line 1849 South East South Eastern Main Line or to 1842–1871 London, South East Staines–Windsor line 1848–1849 South East Sutton and Mole Valley lines 1847–1868 London, South East Tattenham Corner line to 1897–1901 London, South East Waterloo–Reading line 1846–1856 London, South East Wessex Main Line to 1847–1856 South East, South West West Coastway line to 1840–1889 South East West of England line to 1854–1860 South East, South West

South West

This is a list of all routes that enter the South West England region.

Name Route, or previous name Opened Regions Electrified Atlantic Coast Line Par to Newquay 1874 South West Avocet Line to 1862 South West Bristol–Exeter line 1841–1842 South West Cornish Main Line to 1867 South West Cotswold Line to 1851–1860 South East, South West, West Midlands Dartmoor line to Okehampton 1851–1871 South West Exeter–Plymouth line 1846–1849 South West Gloucester–Newport line 1850 South West Golden Valley line to 1845 South West Heart of Wessex Line to 1857 South West Looe Valley Line to 1860–1901 South West Maritime Line to 1863 South West Reading–Taunton line 1847–1906 South East, South West OHLE, (partial) Riviera Line to 1846–1859 South West Severn Beach line Bristol to 1840–1900 South West South Wales Main Line to 1850–1903 South West, South Wales St Ives Bay Line to 1877 South West Tamar Valley Line to 1890–1908 South West Tarka Line Exeter to 1851–1854 South West Wessex Main Line Bristol to Southampton 1847–1856 South East, South West West of England line SWML to Exeter 1854–1860 South East, South West

Terminus Name End and major calling points Countries and regions Category Cross Country Route Bristol, Birmingham, Sheffield, Leeds, York England: East Midlands, South West, Yorkshire and the Humber, West Midlands High Speed Main Line South Wales Main Line Bristol, Swansea via Cardiff England: South West; Wales: South Main Line

North West England

This is a list of all routes that enter the North West England region.

Name Route, or previous name Opened Regions Electrified Blackpool branch lines WCML at to or 1846–1865 North West OHLE, (partial) Borderlands line to 1887–1896 North West Buxton line to 1863 East Midlands, North West OHLE, Calder Valley line or to North West, Yorkshire and the Humber Chester–Birkenhead line 1840 North West Chester–Warrington line 1850 North West Crewe–Liverpool line North West OHLE, Crewe–Manchester line 1841 North West OHLE, Cumbrian Coast Line to 1844–1845 North West East Lancashire line to 1846–1848 North West Furness line to 1846–1858 North West Glossop line to or 1842–1845 East Midlands, North West OHLE, Hooton–Helsby line 1863 North West Hope Valley Line to 1894 North West, Yorkshire and the Humber Huddersfield line or Victoria to 1849 North West, Yorkshire and the Humber Planned Kirkby branch line to 1848 North West Leeds–Morecambe line 1846–1864 North West, Yorkshire and the Humber OHLE, (partial) Liverpool–Manchester lines 1830 onwards North West OHLE, (partial) Liverpool–Wigan line 1869–1871 North West OHLE, Manchester–Preston line 1838–1841 North West OHLE, Manchester–Southport line North West Mid-Cheshire line to 1855–1888 North West Morecambe branch line to or 1864 North West Ormskirk branch line to 1848 North West Ribble Valley line to 1845–1872 North West Settle–Carlisle line 1875 North West, Yorkshire and the Humber Stafford–Manchester line 1848 North West, West Midlands OHLE, Stockport–Stalybridge line North West Styal Line to or 1909 North West OHLE, Tyne Valley line to 1834–1837 North East, North West Windermere branch line to 1847 North West Proposed Wirral lineChester, West Kirby, Elsemere, and New Brighton to LiverpoolNorth West

West Midlands

This is a list of all routes that enter the West Midlands region.

Name Route, or previous name Opened Regions Electrified Birmingham–Peterborough line 1840–1860 East, East Midlands, West Midlands Birmingham to Worcester via Bromsgrove Line 1840–1879 West Midlands OHLE, (partial) Birmingham to Worcester via Kidderminster line 1852–1867 West Midlands Camp Hill line to 1840-1841 West Midlands Chase Line to 1837–1859 (partly closed 1965, reopened 1989–1997) West Midlands OHLE, Chiltern Main Line to 1852–1910 London, South East, West Midlands Cotswold Line to 1851–1860 South East, South West, West Midlands Coventry–Leamington line 1851 West Midlands Coventry–Nuneaton line 1850 West Midlands Crewe–Derby line 1848 East Midlands, North West, West Midlands OHLE, (partial) Cross-City Line or to 1837–1876 West Midlands OHLE, Cross Country Route to 1948 East Midlands, North East, Scotland, South West, Wales, West Anglia, & West Midlands Leamington–Stratford line 1860 West Midlands Leicester–Burton upon Trent line 1832–1849 East Midlands, West Midlands Northampton loop 1881 East Midlands, West Midlands OHLE, North Warwickshire Line to 1908 West Midlands Rugby–Birmingham–Stafford line 1837 West Midlands OHLE, Shrewsbury–Chester line 1848 North West, West Midlands Stafford–Manchester line 1848–1887 North West, West Midlands OHLE, Stone to Colwich Line 1849 West Midlands OHLE, Stourbridge Town branch line 1879 West Midlands Sutton Park line to and 1879 West Midlands Trent Valley line to ; part of the West Coast Main Line 1847 West Midlands OHLE, Walsall–Wolverhampton line 1837 West Midlands OHLE, Welsh Marches line to 1852–1858 Wolverhampton–Shrewsbury line 1848–1849 West Midlands

East of England

This is a list of all routes that enter the East of England region.