Circle line (London Underground) in the context of "London Underground"

The Metropolitan Railway (also known as the Met) was a passenger and goods railway that served London from 1863 to 1933, its main line heading north-west from the capital's financial heart in the City to what were to become the Middlesex suburbs. Its first line connected the main-line railway termini at Paddington, Euston, and King's Cross to the City. The first section was built beneath the New Road using cut-and-cover between Paddington and King's Cross and in tunnel and cuttings beside Farringdon Road from King's Cross to near Smithfield, near the City. It opened to the public on 10 January 1863 with gas-lit wooden carriages hauled by steam locomotives, the world's first passenger-carrying designated underground railway.

The line was soon extended from both ends, and northwards via a branch from Baker Street. Southern branches, directly served, reached Hammersmith in 1864, Richmond in 1877 and the original completed the Inner Circle in 1884. The most important route was northwest into the Middlesex countryside, stimulating the development of new suburbs. Harrow was reached in 1880, and from 1897, having achieved the early patronage of the Duke of Buckingham and the owners of Waddesdon Manor, services extended for many years to Verney Junction in Buckinghamshire.

The District line is a London Underground line running from Upminster in the east and Edgware Road in northwestern Central London to Earl's Court in west London, where it splits into multiple branches. One branch runs to Wimbledon in south-west London and a short branch, with a limited service, only runs for one stop to Kensington (Olympia). The main route continues west from Earl's Court to Turnham Green after which it divides again into two western branches, to Richmond and Ealing Broadway.

Printed in green on the Tube map, the line serves 60 stations (more than any other Underground line) over 40 miles (64 km). It is the only Underground line to use a bridge to traverse the River Thames, crossing on both the Wimbledon and Richmond branches. The track and stations between Barking and Aldgate East are shared with the Hammersmith & City line, and between Tower Hill and Gloucester Road and on the Edgware Road branch they are shared with the Circle line. Some of the stations between South Kensington and Ealing Common are shared with the Piccadilly line. Unlike London's deep-level lines, the railway tunnels are just below the surface, and the trains are of a similar size to those on British main lines.

The Hammersmith & City line is a London Underground line that runs between Hammersmith in west London and Barking in east London. Coloured pink on the Tube map, it serves 29 stations over 15.8 miles (25.5 km). Between Farringdon and Aldgate East it skirts the City of London, the capital's financial heart, hence the line's name. Its tunnels are just below the surface and are a similar size to those on British main lines. Most of the track and all stations are shared with the Circle, District or Metropolitan lines. Over 141 million passenger journeys are made each year on the Hammersmith & City line.

In 1863, the Metropolitan Railway began the world's first underground railway service between Paddington and Farringdon with wooden carriages hauled by steam locomotives. The following year, a railway west from Paddington to Hammersmith was opened and this soon became operated and owned jointly by the Metropolitan and Great Western Railway companies. The line was then extended to the east, in stages, reaching the East London Railway in 1884. The line was electrified in 1906, and, in 1936, after the Metropolitan Railway had been absorbed by the London Passenger Transport Board, some Hammersmith & City line trains were extended over the former District Railway line to Barking. The Hammersmith & City route was shown on the Tube map as part of the Metropolitan line until 30 July 1990, when it was redesignated as a separate line.

Embankment is a London Underground station in the City of Westminster, known by various names during its history. It is served by four lines: Bakerloo, Circle, District and Northern. On the Bakerloo line and the Charing Cross branch of the Northern line, the station is between Charing Cross and Waterloo stations. On the Circle and District lines, it is between Westminster and Temple stations. It is in London fare zone 1. The station has two entrances, one on Victoria Embankment and the other on Villiers Street. The station is adjacent to Victoria Embankment Gardens and is close to Charing Cross station, Embankment Pier, Hungerford Bridge, Cleopatra's Needle, the Royal Air Force Memorial, the Savoy Chapel and Savoy Hotel and the Playhouse and New Players Theatres.

The station is in two parts: sub-surface platforms opened on 30 May 1870 by the District Railway (DR) as part of the company's extension of the Inner Circle eastwards from Westminster to Blackfriars and deep-level platforms opened in 1906 by the Baker Street and Waterloo Railway (BS&WR) and 6 April 1914 by the Charing Cross, Euston and Hampstead Railway (CCE&HR). A variety of underground and main line services have operated over the sub-surface tracks and the CCE&HR part of the station was reconstructed in the 1920s.

King's Cross St Pancras (/ˈkɪŋz ˈkrɒs sənt ˈpæŋkrəs/; also known as King's Cross & St Pancras International) is a London Underground station on Euston Road in the London Borough of Camden, Central London. It serves King's Cross and St Pancras main line stations in London fare zone 1, and is served by six lines: Circle, Hammersmith & City, Metropolitan, Northern, Piccadilly and Victoria. The station was one of the first to open on the network. As of 2024, it is the 2nd busiest station on the network for passenger entrances and exits combined.

On the Circle, Hammersmith & City and Metropolitan lines, the station is between Euston Square and Farringdon stations. On the Bank branch of the Northern line the station is between Euston and Angel stations, on the Piccadilly line it is between Russell Square and Caledonian Road stations, and on the Victoria line it is between Euston and Highbury & Islington stations.

Victoria station, also known as London Victoria, is a central London railway terminus and connected London Underground station in Victoria, in the City of Westminster, managed by Network Rail. Named after the nearby Victoria Street, the mainline station is a terminus of the Brighton Main Line to Gatwick Airport and Brighton and the Chatham Main Line to Ramsgate and Dover via Chatham. From the main lines, trains can connect to the Catford Loop Line, the Dartford Loop Line, the Sutton & Mole Valley lines to Dorking and the Oxted line to East Grinstead. Southern operates most commuter and regional services to south London, Sussex and parts of east Surrey and south-east Hampshire while Southeastern operates trains to south-east London and Kent, alongside limited services operated by Thameslink. Gatwick Express trains run direct to Gatwick. The London Underground station is served by three lines: Circle, District and Victoria. On the Circle and District lines, the station is between Sloane Square and St James's Park stations. On the Victoria line, it is between Pimlico and Green Park stations. The area around the station is an important interchange for other forms of transport: a local bus station is in the forecourt and Victoria Coach Station is nearby, which serves national and international coaches.

Victoria was built to serve both the Brighton and Chatham Main Lines, and has always had a "split" feel of being two separate stations. The Brighton station opened in 1860 with the Chatham station following two years later. It replaced a temporary terminus at Pimlico, and construction involved building the Grosvenor Bridge over the River Thames. It became immediately popular as a London terminus, causing delays and requiring upgrades and rebuilding. It was well known for luxury Pullman train services and continental boat-train trips, and became a focal point for soldiers during World War I.

Bank and Monument are two interlinked stations in the City of London that form a public transport complex served by five lines of the London Underground as well as the Docklands Light Railway (DLR).

Bank station, named after the Bank of England, opened in 1900 at Bank Junction and is served by the Central, Northern and Waterloo & City lines of the Underground, and the DLR. Monument station, named after the Monument to the Great Fire of London, opened in 1884 and is served by the Circle and District lines. The stations have been linked as an interchange since 1933.

London Paddington is a main line and tube station complex on Praed Street, Paddington, London, which has been the main terminus for the Great Western Railway and successors since 1838. The main line station opened in 1854 and was designed by Isambard Kingdom Brunel. In the year ending March 2025, it was the third busiest station in Great Britain after London Liverpool Street and London Waterloo, with an estimated 69.9 million entries and exits.

Paddington is the London terminus of the Great Western Main Line; passenger services are primarily operated by Great Western Railway, which provides commuter and regional passenger services to west London and the Thames Valley region, as well as long-distance intercity services to South West England and South Wales. The station is the eastern terminus for Heathrow Express. Elizabeth line services run through Paddington westwards to Reading, Heathrow Terminal 5, and Heathrow Terminal 4, and eastwards to Abbey Wood and Shenfield. Situated in London fare zone 1, it has two separate London Underground stations: one for the Bakerloo, Circle and District lines; the other for the Circle and Hammersmith & City lines. It is one of 11 London stations managed directly by Network Rail.