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64-682: The ESN is intended to offer the following services: As part of the construction of the ESN, almost 300 extra 4G sites will be added to extend the reach of the EE network to more remote parts of the country. The ESN will also serve the London Underground network. In April 2014, the government announced the Emergency Services Mobile Communications Programme (ESMCP) to migrate emergency services to

128-435: A photocopier involves capex, and the annual paper, toner , power and maintenance costs represents opex. For larger systems like businesses, opex may also include the cost of workers and facility expenses such as rent and utilities. In business , an operating expense is a day-to-day expense such as sales and administration , or research & development , as opposed to production, costs, and pricing . In short, this

192-500: A 4G-based network, to be called the Emergency Services Network. One of the intentions of this program was to switch from the private Airwave network to an existing commercial network. The switch was intended to begin in 2017 and be completed in 2019 before the existing Airwave contract was set to expire. Implementation of the network was split into three lots. In June 2015, O2 announced they would be pulling out

256-594: A day use District Line tracks between Wimbledon and East Putney. London Underground trains come in two sizes, larger sub-surface trains and smaller deep-tube trains. Since the early 1960s all passenger trains have been electric multiple units with sliding doors and a train last ran with a guard in 2000. All lines use fixed-length trains with between six and eight cars, except for the Waterloo & City line that uses four cars. New trains are designed for maximum number of standing passengers and for speed of access to

320-451: A day. In 2023/24 it was used for 1.181billion passenger journeys. The system's first tunnels were built just below the ground, using the cut-and-cover method; later, smaller, roughly circular tunnels—which gave rise to its nickname, the Tube—were dug through at a deeper level. Despite its name, only 45% of the system is under the ground: much of the network in the outer environs of London

384-783: A diameter of about 11 feet 8 inches (3.56 m), with one tube for each direction. The seven deep-level lines have the exclusive use of tracks and stations along their routes with the exceptions of the Piccadilly line, which shares track with the District line, between Acton Town and Hanger Lane Junction, and with the Metropolitan line, between Rayners Lane and Uxbridge; and the Bakerloo line, which shares track with London Overground 's Watford DC Line for its above-ground section north of Queen's Park. Fifty-five per cent of

448-517: A potential difference of 630 V . On the sections of line shared with mainline trains, such as the District line from East Putney to Wimbledon and Gunnersbury to Richmond, and the Bakerloo line north of Queen's Park, the centre rail is bonded to the running rails. The average speed on the Underground is 20.5 mph (33.0 km/h). Outside the tunnels of central London, many lines' trains tend to travel at over 40 mph (64 km/h) in

512-594: A public transport system. The LPTB commissioned many new station buildings, posters and public artworks in a modernist style. The schematic Tube map , designed by Harry Beck in 1931, was voted a national design icon in 2006 and now includes other transport systems besides the Underground, such as the Docklands Light Railway , London Overground , Thameslink , the Elizabeth line , and Tramlink . Other famous London Underground branding includes

576-452: A wholly owned subsidiary of Transport for London (TfL), the statutory corporation responsible for the transport network in London. As of 2015 , 92% of operational expenditure is covered by passenger fares. The Travelcard ticket was introduced in 1983 and Oyster card , a contactless ticketing system, in 2003. Contactless bank card payments were introduced in 2014, the first such use on

640-463: Is a beta test network intended as a forerunner to the ESN. It is not intended to be used for mission-critical operations. This is to be followed by ESN Version 1.0, the first fielded version of the ESN service. London Underground The London Underground (also known simply as the Underground or by its nickname the Tube ) is a rapid transit system serving Greater London and some parts of

704-760: Is identified by a letter (such as S Stock , used on the Metropolitan line ), while tube stock is identified by the year of intended introduction (for example, 1996 Stock , used on the Jubilee line). The Underground is served by the following depots: In the years since the first parts of the London Underground opened, many stations and routes have been closed. Some stations were closed because of low passenger numbers rendering them uneconomical; some became redundant after lines were re-routed or replacements were constructed; and others are no longer served by

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768-488: Is on the surface. The early tube lines, originally owned by several private companies, were brought together under the Underground brand in the early 20th century, and eventually merged along with the sub-surface lines and bus services in 1933 to form London Transport under the control of the London Passenger Transport Board (LPTB). The current operator, London Underground Limited (LUL), is

832-426: Is the money the business spends in order to turn inventory into throughput . On an income statement , "operating expenses" is the sum of a business's operating expenses for a period of time, such as a month or year. In throughput accounting , the cost accounting aspect of the theory of constraints (TOC), operating expense is the money spent turning inventory into throughput . In TOC, operating expense

896-565: The City & South London Railway in 1890, is now part of the Northern line . The network has expanded to 11 lines with 250 miles (400 km) of track. However, the Underground does not cover most southern parts of Greater London ; there are only 33 Underground stations south of the River Thames . The system's 272 stations collectively accommodate up to 5million passenger journeys

960-535: The Great Northern and City Railway , which opened in 1904, was built to take main line trains from Finsbury Park to a Moorgate terminus in the City and had 16-foot (4.9 m) diameter tunnels. While steam locomotives were in use on the Underground there were contrasting health reports. There were many instances of passengers collapsing whilst travelling, due to heat and pollution, leading for calls to clean

1024-727: The London 2012 Olympic and Paralympic Games , the Underground saw record passenger numbers, with over 4.3   million people using the Tube on some days. This record was subsequently beaten in later years, with 4.82   million passengers in December 2015. In 2013, the Underground celebrated its 150th anniversary, with celebratory events such as steam trains and installation of a unique Labyrinth artwork at each station. Under TfL, London's public transport network became more unified, with existing suburban rail lines across London upgraded and rebranded as London Overground from 2007, with

1088-598: The London Blitz , a bomb penetrated the booking hall of Bank Station , the blast from which killed 111 people, many of whom were sleeping in passageways and on platforms. On 3 March 1943, a test of the air-raid warning sirens, together with the firing of a new type of anti-aircraft rocket, resulted in a crush of people attempting to take shelter in Bethnal Green Underground station . A total of 173 people, including 62 children, died, making this both

1152-553: The London Passenger Transport Board , which used the London Transport brand . The Waterloo & City Railway , which was by then in the ownership of the main line Southern Railway , remained with its existing owners. In the same year that the London Passenger Transport Board was formed, Harry Beck 's diagrammatic tube map first appeared. In the following years, the outlying lines of

1216-581: The M25 London Orbital motorway ( Amersham , Chalfont & Latimer , Chesham , and Chorleywood on the Metropolitan line and Epping on the Central). Of the thirty-two London boroughs , six ( Bexley , Bromley , Croydon , Kingston , Lewisham and Sutton ) are not served by the Underground network, while Hackney has Old Street (on the Northern line Bank branch) and Manor House (on

1280-490: The Northern line from Kennington to Battersea Power Station via Nine Elms . The extension was privately funded, with contributions from developments across the Battersea Power Station , Vauxhall and Nine Elms areas. As of 2021, the Underground serves 272 stations . Sixteen stations (eight on each of the Metropolitan and Central lines) are outside the London region , with five of those beyond

1344-522: The Public Accounts Committee announced that the ESN might not be ready for its December 2019 deadline. In September 2018, it was announced that Airwave's existing contract would be renewed until December 2022. In June 2022, a procurement request was issued for up to three suppliers of TETRA Encryption Algorithm 2 radio devices, and other maintenance services. As of 2022, the ESN is now expected to start operations from 2026. ESN Beta

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1408-529: The Victoria line was dug under central London and, unlike the earlier tunnels, did not follow the roads above. The line opened in 1968–71 with the trains being driven automatically and magnetically encoded tickets collected by automatic gates gave access to the platforms. On 1 January 1970, responsibility for public transport within Greater London passed from central government to local government, in

1472-539: The West London line were suspended, leaving Olympia exhibition centre without a railway service until a District line shuttle from Earl's Court began after the war. After work restarted on the Central line extensions in east and west London, these were completed in 1949. During the war many tube stations were used as air-raid shelters. They were not always a guarantee of safety however; on 11 January 1941 during

1536-625: The roundel and the Johnston typeface , created by Edward Johnston in 1916. The idea of an underground railway linking the City of London with the urban centre was proposed in the 1830s, and the Metropolitan Railway was granted permission to build such a line in 1854. To prepare construction, a short test tunnel was built in 1855 in Kibblesworth , a small town with geological properties similar to London. This test tunnel

1600-473: The Central line east of St Paul's station); or trains run on the right (for example on the Victoria line between Warren Street and King's Cross St. Pancras, to allow cross-platform interchange with the Northern line at Euston ). The lines are electrified with a four-rail DC system: a conductor rail between the rails is energised at −210 V and a rail outside the running rails at +420 V , giving

1664-831: The District Railway and established the Underground Electric Railways Company of London (UERL) in 1902 to finance and operate three tube lines, the Baker Street and Waterloo Railway (Bakerloo), the Charing Cross, Euston and Hampstead Railway (Hampstead) and the Great Northern, Piccadilly and Brompton Railway , (Piccadilly), which all opened between 1906 and 1907. When the "Bakerloo" was so named in July 1906, The Railway Magazine called it an undignified "gutter title". By 1907

1728-696: The District and Metropolitan Railways had electrified the underground sections of their lines. In January 1913, the UERL acquired the Central London Railway and the City & South London Railway , as well as many of London's bus and tram operators. Only the Metropolitan Railway , along with its subsidiaries the Great Northern & City Railway and the East London Railway , and the Waterloo & City Railway , by then owned by

1792-712: The London Underground. In 1976, the Northern City Line was taken over by British Rail and linked up with the main line railway at Finsbury Park , a transfer that had already been planned prior to the accident. In 1979, another new tube, the Jubilee line , named in honour of the Silver Jubilee of Elizabeth II , took over the Stanmore branch from the Bakerloo line, linking it to a newly constructed line between Baker Street and Charing Cross stations. Under

1856-531: The Piccadilly line) just inside its boundaries. Lewisham was served by the East London line (with stations at New Cross and New Cross Gate ) until 2010 when the line and the stations were transferred to the London Overground network. London Underground's eleven lines total 402 kilometres (250 mi) in length, making it the eleventh longest metro system in the world . These are made up of

1920-455: The Tube has taken place - with new trains (such as London Underground S7 and S8 Stock ), new signalling, upgraded stations (such as King's Cross St Pancras ) and improved accessibility (such as at Green Park ). Small changes to the Tube network occurred in the 2000s, with extensions to Heathrow Terminal 5 , new station at Wood Lane and the Circle line changed from serving a closed loop around

1984-436: The Underground but remain open to National Rail main line services. In some cases, such as Aldwych and Ongar , the buildings remain and are used for other purposes. In others, such as British Museum , all evidence of the station has been lost through demolition. London Transport Museum runs guided tours of several disused stations including Down Street and Aldwych through its "Hidden London" programme. The tours look at

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2048-518: The adjacent home counties of Buckinghamshire , Essex and Hertfordshire in England. The Underground has its origins in the Metropolitan Railway , opening on 10 January 1863 as the world's first underground passenger railway. The Metropolitan is now part of the Circle , District , Hammersmith & City and Metropolitan lines . The first line to operate underground electric traction trains ,

2112-621: The advent of electric Tube services (the Waterloo and City Railway and the Great Northern and City Railway), the Volks Electric Railway , in Brighton , and competition from electric trams, the pioneering Underground companies needed modernising. In the early 20th century, the District and Metropolitan railways needed to electrify and a joint committee recommended an AC system, the two companies co-operating because of

2176-490: The air through the installation of garden plants. The Metropolitan even encouraged beards for staff to act as an air filter. There were other reports claiming beneficial outcomes of using the Underground, including the designation of Great Portland Street as a " sanatorium for [sufferers of ...] asthma and bronchial complaints", tonsillitis could be cured with acid gas and the Twopenny Tube cured anorexia . With

2240-480: The bidding process for providing mobile services which left only EE in negotiations. At this point Airwave was not listed as bidding for operating any part of the ESMCP. In August 2015 the delivery partner was named as Kellogg Brown & Root . Finally, in December 2015 EE was officially announced as the provider of mobile services and Motorola Solutions was named as the provider of user services. In January 2017,

2304-432: The cars and have regenerative braking and public address systems. Since 1999 all new stock has had to comply with accessibility regulations that require such things as access and room for wheelchairs, and the size and location of door controls. All underground trains are required to comply with The Rail Vehicle Accessibility (Non Interoperable Rail System) Regulations 2010 (RVAR 2010) by 2020. Stock on sub-surface lines

2368-658: The centre of London to a spiral also serving Hammersmith in 2009. In July 2005, four coordinated terrorist attacks took place, three of them occurring on the Tube network. It was the UK's deadliest terrorist incident since 1988. Electronic ticketing in the form of the contactless Oyster card was first introduced in 2003, with payment using contactless banks cards introduced in September 2014. In 2019 , over 12million Oyster cards and 35million contactless cards were used, generating around £5billion in ticketing revenue. During

2432-566: The control of the GLC, London Transport introduced a system of fare zones for buses and underground trains that cut the average fare in 1981. Fares increased following a legal challenge but the fare zones were retained, and in the mid-1980s the Travelcard and the Capitalcard were introduced. In 1984, control of London Buses and the London Underground passed back to central government with

2496-533: The creation of London Regional Transport (LRT), which reported directly to the Secretary of State for Transport , still retaining the London Transport brand. One person operation had been planned in 1968, but conflict with the trade unions delayed introduction until the 1980s. On 18 November 1987, fire broke out in an escalator at King's Cross St Pancras tube station . The resulting fire cost

2560-691: The early 1960s, the Metropolitan line was electrified as far as Amersham , British Railways providing services for the former Metropolitan line stations between Amersham and Aylesbury. In 1962, the British Transport Commission was abolished, and the London Transport Executive was renamed the London Transport Board , reporting directly to the Minister of Transport . Also during the 1960s,

2624-463: The early 2000s, London Underground was reorganised in a Public-Private Partnership (PPP) as part of a project to upgrade and modernise the system. Private infrastructure companies (infracos) would upgrade and maintain the railway, and London Underground would run the train service. One infraco – Metronet – went into administration in 2007, and TfL took over the other – Tube Lines – in 2010. Despite this, substantial investment to upgrade and modernise

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2688-692: The emergency services. In April 1994, the Waterloo & City Railway , by then owned by British Rail and known as the Waterloo & City line, was transferred to the London Underground. In 1999, the Jubilee Line Extension project extended the Jubilee line from Green Park station through the growing Docklands to Stratford station . This resulted in the closure of the short section of tunnel between Green Park and Charing Cross stations. The 11 new stations were designed to be " future-proof ", with wide passageways, large quantities of escalators and lifts, and emergency exits. The stations were

2752-615: The first on the Underground to have platform edge doors , and were built to have step-free access throughout. The stations have subsequently been praised as exemplary pieces of 20th-century architecture. In 2000, Transport for London (TfL) was created as an integrated body responsible for London's transport system. Part of the Greater London Authority , the TfL Board is appointed by the Mayor of London , who also sets

2816-629: The form of the Greater London Council (GLC), and the London Transport Board was abolished. The London Transport brand continued to be used by the GLC. On 28 February 1975, a southbound train on the Northern City Line failed to stop at its Moorgate terminus and crashed into the wall at the end of the tunnel, in the Moorgate tube crash . There were 43 deaths and 74 injuries, the greatest loss of life during peacetime on

2880-538: The former East London line becoming part of the Overground network in 2010. Many Overground stations interchange with Underground ones, and Overground lines were added onto the Tube map. In the 2010s, the £18.8   billion Crossrail project built a new east–west railway tunnel under central London. The project involved rebuilding and expanding several central Underground stations including Tottenham Court Road and Whitechapel . By increasing rail capacity,

2944-566: The former Metropolitan Railway closed, the Brill Tramway in 1935, and the line from Quainton Road to Verney Junction in 1936. The 1935–40 New Works Programme included the extension of the Central and Northern lines and the Bakerloo line to take over the Metropolitan's Stanmore branch. The Second World War suspended these plans after the Bakerloo line had reached Stanmore and the Northern line High Barnet and Mill Hill East in 1941. Following bombing in 1940, passenger services over

3008-412: The history of the network and feature historical details drawn from the museum's own archives and collections. Operational expenditure An operating expense ( opex ) is an ongoing cost for running a product, business, or system. Its counterpart, a capital expenditure (capex), is the cost of developing or providing non-consumable parts for the product or system. For example, the purchase of

3072-524: The line aims to reduce overcrowding on the Tube and cut cross-London journey times. The railway opened as the Elizabeth line in May 2022. Although not part of the Underground, the line connects with several Underground stations. In 2020, passenger numbers fell significantly during the COVID-19 pandemic and 40 stations were temporarily closed. The Northern Line Extension opened in September 2021, extending

3136-411: The line. Electrification was extended north from Harrow to Rickmansworth , and branches opened from Rickmansworth to Watford in 1925 and from Wembley Park to Stanmore in 1932. The Piccadilly line was extended north to Cockfosters and took over District line branches to Harrow (later Uxbridge) and Hounslow. In 1933, most of London's underground railways, tramway and bus services were merged to form

3200-530: The lives of 31 people and injured a further 100. London Underground was strongly criticised in the aftermath for its attitude to fires underground, and publication of the report into the fire led to the resignation of senior management of both London Underground and London Regional Transport. Following the fire, substantial improvements to safety on the Tube were implemented – including the banning of smoking, removal of wooden escalators, installation of CCTV and fire detectors, as well as comprehensive radio coverage for

3264-633: The main line London and South Western Railway , remained outside the Underground Group's control. A joint marketing agreement between most of the companies in the early years of the 20th century included maps, joint publicity, through ticketing and U NDERGROUN D signs, incorporating the first bullseye symbol, outside stations in Central London. At the time, the term Underground was selected from three other proposed names; 'Tube' and 'Electric' were both officially rejected. Ironically,

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3328-508: The roads to avoid the need for agreement with owners of property on the surface. This opened in 1890 with electric locomotives that hauled carriages with small opaque windows, nicknamed padded cells . The Waterloo and City Railway opened in 1898, followed by the Central London Railway in 1900, known as the "twopenny tube". These two ran electric trains in circular tunnels having diameters between 11 feet 8 inches (3.56 m) and 12 feet 2.5 inches (3.72 m), whereas

3392-496: The service. The Metropolitan District Railway (commonly known as the District Railway ) opened in December 1868 from South Kensington to Westminster as part of a plan for an underground "inner circle" connecting London's main-line stations. The Metropolitan and District railways completed the Circle line in 1884, built using the cut and cover method. Both railways expanded, the District building five branches to

3456-596: The shared ownership of the inner circle. The District, needing to raise the finance necessary, found an investor in the American Charles Yerkes who favoured a DC system similar to that in use on the City & South London and Central London railways. The Metropolitan Railway protested about the change of plan, but after arbitration by the Board of Trade , the DC system was adopted. Yerkes soon had control of

3520-546: The structure and level of public transport fares in London. The day-to-day running of the corporation is left to the Commissioner of Transport for London . TfL eventually replaced London Regional Transport, and discontinued the use of the London Transport brand in favour of its own brand. The transfer of responsibility was staged, with transfer of control of London Underground delayed until July 2003, when London Underground Limited became an indirect subsidiary of TfL. In

3584-612: The sub-surface network and the deep-tube lines. The Circle , District , Hammersmith & City , and Metropolitan lines form the sub-surface network, with cut-and-cover railway tunnels just below the surface and of a similar size to those on British main lines They converged on a bi-directional loop in central London, sharing tracks and stations with each other at various places along their respective routes. The Bakerloo , Central , Jubilee, Northern, Piccadilly, Victoria and Waterloo & City lines are deep-level tubes, with smaller trains that run in circular tunnels ( tubes ) with

3648-521: The suburban and countryside areas. The Metropolitan line can reach speeds of 62 mph (100 km/h). The London Underground was used for 1.181   billion journeys in the year 2023–2024. The Underground uses several railways and alignments that were built by main-line railway companies. Chiltern Railways shares track with the Metropolitan Line between Harrow-on-the-Hill and Amersham. Three South Western Railway passenger trains

3712-418: The system runs on the surface. There are 20 miles (32 km) of sub-surface tunnels and 93 miles (150 km) of tube tunnels. Many of the central London Underground stations on deep-level tube routes are higher than the running lines to assist deceleration when arriving and acceleration when departing. Trains generally run on the left-hand track. In some places, the tunnels are above each other (for example,

3776-464: The term Tube was later adopted alongside the Underground. The Bakerloo line was extended north to Queen's Park to join a new electric line from Euston to Watford , but the First World War delayed construction and trains reached Watford Junction in 1917. During air raids in 1915 people used the tube stations as shelters. An extension of the Central line west to Ealing was also delayed by

3840-437: The war and was completed in 1920. After the war, government-backed financial guarantees were used to expand the network and the tunnels of the City and South London and Hampstead railways were linked at Euston and Kennington; the combined service was not named the Northern line until later. The Metropolitan promoted housing estates near the railway with the " Metro-land " brand and nine housing estates were built near stations on

3904-562: The west reaching Ealing , Hounslow , Uxbridge , Richmond and Wimbledon and the Metropolitan eventually extended as far as Verney Junction in Buckinghamshire – more than 50 miles (80 km) from Baker Street and the centre of London. For the first deep-level tube line, the City and South London Railway , two 10 feet 2 inches (3.10 m) diameter circular tunnels were dug between King William Street (close to today's Monument station ) and Stockwell , under

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3968-761: The worst civilian disaster in Britain during the Second World War, and the largest loss of life in a single incident on the London Underground network. On 1 January 1948, under the provisions of the Transport Act 1947 , the London Passenger Transport Board was nationalised and renamed the London Transport Executive , becoming a subsidiary transport organisation of the British Transport Commission , which

4032-430: Was formed on the same day. Under the same act, the country's main line railways were also nationalised, and their reconstruction was given priority over the maintenance of the Underground and most of the unfinished plans of the pre-war New Works Programme were shelved or postponed. The District line needed new trains and an unpainted aluminium train entered service in 1953, this becoming the standard for new trains. In

4096-403: Was used for two years in the development of the first underground train, and was later, in 1861, filled up. The world's first underground railway, it opened in January 1863 between Paddington and Farringdon using gas-lit wooden carriages hauled by steam locomotives. It was hailed as a success, carrying 38,000 passengers on the opening day, and borrowing trains from other railways to supplement

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