|Locale||Greater London and home counties|
|Transit type||Rapid transit|
|Number of lines||11|
|Number of stations||270 served (260 owned)|
|Annual ridership||1.23 billion (2012/13)|
|Began operation||10 January 1863|
|Operator(s)||Transport for London|
|System length||402 km (250 mi)|
|Track gauge||1,435 mm (4 ft 8 1⁄2 in) standard gauge|
|Electrification||630 V DC fourth rail|
|Part of a series of articles on|
|London Transport portal|
The London Underground (also known as the Tube or simply the Underground) is a public rapid transit system serving a large part of Greater London and parts of the home counties of Buckinghamshire, Hertfordshire and Essex. The system serves 270 stations and has 402 kilometres (250 mi) of track, 55% of which is above ground. The network incorporates the world's first underground railway, the Metropolitan Railway, which opened in 1863 and is now part of the Circle, Hammersmith & City and Metropolitan lines; and the first line to operate underground electric traction trains, the City & South London Railway in 1890, now part of the Northern line. The network has expanded to 11 lines, and in 2012/13 carried 1.23 billion passengers, making it the twelfth busiest transit system, behind New York City, Paris, and Madrid, among others.
The system's first tunnels were built just below the surface using the cut and cover method. Later, circular tunnels – which give rise to its nickname the Tube – were dug through the London Clay at a deeper level. The early lines were marketed as the UNDERGROUND in the early 20th century on maps and signs at central London stations. The private companies that owned and ran the railways were merged in 1933 to form the London Passenger Transport Board. The current operator, London Underground Limited (LUL), is a wholly owned subsidiary of Transport for London (TfL), the statutory corporation responsible for most elements of the transport network in Greater London.
Today in official publicity and in general, the term 'Tube' embraces the whole Underground system, not just the lines that run in deep-level tunnels. The schematic Tube map, designed by Harry Beck in 1931, was voted a national design icon in 2006 and now includes other lines - the Docklands Light Railway and London Overground - as well as the non-rail Emirates Air Line. London Underground celebrated 150 years of operations in 2013, with various events marking the milestone.
- 1 History
- 2 Infrastructure
- 3 Proposed improvements and expansions
- 4 Travelling
- 5 Design and the arts
- 6 Notable people
- 7 See also
- 8 References
- 9 Bibliography
- 10 External links
The idea of an underground railway linking the City of London with some of the railway termini in its urban centre was proposed in the 1830s, and the Metropolitan Railway was granted permission to build such a line in 1854. 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 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 termini. 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 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 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 inches (3.71 m), whereas 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.
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 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 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 the District and Metropolitan Railways had electrified the underground sections of their lines.
A joint marketing agreement between most of the companies in the early years of the 20th century included maps, joint publicity, through ticketing and UNDERGROUND signs outside stations in Central London. The Bakerloo line was extended north to Queen's Park to join a new electric line from Euston to Watford, but World War I 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 east to Ealing was also delayed by the war and 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, although 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 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, London's underground railways, tramway and bus operators were merged to form the London Passenger Transport Board, which became known as London Transport, and Harry Beck's diagrammatic tube map appeared for the first time. The outlying lines of 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. World War II suspended these plans after the Bakerloo line had reached Stanmore and the Northern line High Barnet and Mill Hill East in 1941. During the war many tube stations were used as air-raid shelters. Following bombing in 1940 passenger services over 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 complete in 1949. After Britain's railways were nationalised in 1948 the reconstruction of the main line railways 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.
However, the District line needed new trains and an unpainted aluminium train entered service in 1953, this becoming the standard for new trains. In the early 1960s the Metropolitan line was electrified as far as Amersham, British Rail providing services for the former Metropolitan line stations between Amersham and Aylesbury. The Victoria line was dug under central London and, unlike the earlier tubes, the 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. In 1976 the isolated Northern City Line was taken over by British Rail and linked up with the main line railway at Finsbury Park.
In 1979 another new tube, the Jubilee line, named in honour of Queen Elizabeth's Silver Jubilee, took over the Stanmore branch from the Bakerloo line and was extended through to the Docklands in 1999. Under the control of the Greater London Council, 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. To comply with new safety regulations issued as a result of the King's Cross fire and to combat graffiti a train refurbishment project was launched in July 1991. In 1984 control of London Buses and the London Underground passed to London Regional Transport (LRT), which reported directly to Secretary of State for Transport. One person operation had been planned in 1968, but conflict with the trade unions delayed introduction until the 1980s.
In the early years of the 21st century London Underground was reorganised in a Public-Private Partnership where private infrastructure companies (infracos) upgraded and maintained the railway. In 2003 control passed to Transport for London (TfL) that had been opposed to the arrangement. One infraco went into administration in 2007 and TfL took over the responsibilities, TfL taking over the other in 2010. Electronic ticketing in the form of the contact-less Oyster card was introduced in 2003. The East London line closed in 2007 so that it could be converted into a London Overground line, and in December 2009 the Circle line changed from serving a closed loop around the centre of London to a spiral also serving Hammersmith.
Transport for London
Transport for London (TfL) was created in 2000 as the integrated body responsible for London's transport system. It replaced London Regional Transport. It assumed control of London Underground Limited in July 2003. TfL is part of the Greater London Authority and is constituted as a statutory corporation regulated under local government finance rules. It has three subsidiaries: London Transport Insurance (Guernsey) Ltd, TfL Trustee Company Ltd and Transport Trading Ltd (TTL), and London Underground Limited is a subsidiary of TTL. The TfL Board is appointed by the Mayor of London. The Mayor also sets the structure and level of public transport fares in London. However the day-to-day running of the corporation is left to the Commissioner of Transport for London. The current Commissioner is Peter Hendy. The Mayor is responsible for producing an integrated transport strategy for London and for consulting the GLA, TfL, local councils and others on the strategy. The Mayor is also responsible for setting TfL's budget. The GLA is consulted on the Mayor's transport strategy, and inspects and approves the Mayor's budget. It is able to summon the Mayor and senior staff to account for TfL's performance. London TravelWatch, a body appointed by and reporting to the Assembly, deals with complaints about transport in London.
The Underground serves 270 stations. Fourteen Underground stations are outside Greater London, of which five (Amersham, Chalfont & Latimer, Chesham, and Chorleywood on the Metropolitan line, and Epping on the Central line), are beyond the M25 London Orbital motorway. Of the 32 London boroughs, six (Bexley, Bromley, Croydon, Kingston, Lewisham and Sutton) are not served by the Underground network, while Hackney has Old Street and Manor House only just inside its boundaries.
London Underground's eleven lines total 402 kilometres (250 mi) in length, making it the fourth longest metro system in the world. These are made up of the sub-surface network and the deep-tube lines. The Circle, District, Hammersmith & City, and Metropolitan lines form the sub-surface network, with railway tunnels just below the surface and of a similar size to those on British main lines. The Hammersmith & City and Circle lines share stations and most of their track with each other, as well as with the Metropolitan and District lines. The Bakerloo, Central, Jubilee, Northern, Piccadilly, Victoria and Waterloo & City lines are deep-level tubes, with smaller trains that run in two circular tunnels (tubes) with a diameter about 11 feet 8 inches (3.56 m). These lines have the exclusive use of a pair of tracks, except for 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 services north of Queen's Park. Fifty-five per cent of the system runs on the surface, and there are 20 miles (32 km) of cut-and-cover tunnel and 93 miles (150 km) of tube tunnel. Many of the central London underground stations on deep-level tube lines are higher than the running lines to assist deceleration when arriving and acceleration when departing. Trains generally run on the left-hand track, although in some places the tunnels are above each other, for example the Central line east of St Paul's station, or the running tunnels are 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 between northbound and southbound trains 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 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.
|Current Stock||Future Stock||Trips
|Hammersmith & City line||Pink||1864[d]||Sub
|Piccadilly line||Dark Blue||1906||Deep
|Victoria line||Light Blue||1968||Deep
|Waterloo & City line||Turquoise||1898[f]||Deep
Former main lines
The Underground uses a number of railways and alignments that were built by main-line railway companies.
- Bakerloo line: Between Queen's Park and Harrow & Wealdstone this runs largely parallel to the London & North Western Railway (LNWR) main line that opened in 1837. The Bakerloo line route has always been segregated, and was laid out by the LNWR in 1912–15.
- Central line: The railway from just south of Leyton to just south of Loughton was built by Eastern Counties Railway in 1856 on the same alignment in use today. The Underground also uses the line built in 1865 by the Great Eastern Railway (GER) between Loughton to Ongar via Epping. The connection to the main line south of Leyton was closed in 1970 and removed in 1972. The line from Epping to Ongar was closed in 1994; most of the line is in use today by the heritage Epping Ongar Railway. The line between Newbury Park and Woodford junction (west of Roding Valley) via Hainault was built by the GER in 1903, the connections to the main line south of Newbury Park closing in 1947 (in the Ilford direction) and 1956 (in the Seven Kings direction).
- Central line: The line from just north of White City to Ealing Broadway was built in 1917 by the Great Western Railway (GWR) and passenger service introduced by the Underground in 1920. North Acton to West Ruislip was built by GWR on behalf of the Underground in 1947–8 as parallel line to the pre-existing tracks from Old Oak Common junction towards High Wycombe and beyond, which date from 1904. As of May 2013[update], the original Old Oak Common junction to South Ruislip route sees one main-line train a day to/from Paddington.
- District line: South of Kensington Olympia short sections of the 1862 West London Railway (WLR) and its 1863 West London Extension Railway (WLER) were used when District extended from Earl's Court in 1872. The District had its own bay platform at Olympia built in 1958 along with track on the bed of the 1862/3 WLR/WLER northbound. Southbound WLR/WLER became the new northbound main line at this time, and a new southbound main-line track was built through site of former goods yard. The 1872 junction closed in 1958, while a further connection to the WLR just south of Olympia closed in 1992, and the branch is now segregated.
- District line: The line between Campbell Road junction (now closed), near Bromley-by-Bow, and Barking was built by the London, Tilbury & Southend Railway (LTSR) in 1858. The slow tracks were built 1903–05, when District services were extended from Bow Road (though there were no District services east of East Ham from 1905 to 1932). The slow tracks were shared with LTSR stopping and goods trains until segregated by 1962, when main-line trains stopped serving intermediate stations.
- District line: The railway from Barking to Upminster was built by LTSR in 1885 and the District extended over the route in 1902. District withdrew between 1905 and 1932, when the route was quadrupled. Main-line trains ceased serving intermediate stations in 1962, and the District line today only uses the 1932 slow tracks.
- District line: The westbound track between east of Ravenscourt Park and Turnham Green and Turnham Green to Gunnersbury follows the alignment of a railway built by the London & South Western Railway (LSWR) in 1869. Eastbound track between Turnham Green and east of Ravenscourt Park follows the alignment built in 1911; this was closed 1916 before being re-used when the Piccadilly line was extended in 1932.
- District line: The line between East Putney and Wimbledon was built by the LSWR in 1889. The last regular main-line service ran in 1941 but it still sees a few Waterloo services at the start and end of the daily timetable.
- Hammersmith & City: Between Paddington and Westbourne Park tube station, the line is parallel to the main line. The Great Western main line opened in 1836, serving a temporary terminus the other side of Bishop's Road and when the current Paddington station opened in 1854, the line passed to the south of the old station. On opening in 1864 the Hammersmith & City ran via the main line to a junction at Westbourne Park, until 1867 when two tracks opened to the south of the main line, with a crossing near Westbourne Bridge, Paddington. The current two tracks to the north of the main line and the subway east of Westbourne Park opened in 1878. The H & C route is now completely segregated from the main line.
- Jubilee line: Between Canning Town and Stratford was built the GER in 1846 with passenger services starting in 1847, making this the oldest railway in use as part of today's Underground system. The original alignment was quadrupled "in stages between 1860 and 1892" for freight services before being lifted as traffic declined during the 20th century and re-laid for Jubilee line services that started in 1999. The current Docklands Light Railway (ex-North London Line) uses the original eastern alignment and the Jubilee uses the western alignment.
- Northern line: The line from East Finchley to Mill Hill East was opened in 1867, and from Finchley Central to High Barnet in 1872, both by the Great Northern Railway.
- Piccadilly line: westbound track between east of Ravenscourt Park and Turnham Green built by LSWR in 1869, originally used for eastbound main-line and District services, eastbound track built in 1911 and closed 1916 and re-used when the Piccadilly line was extended in 1932.
Main line routes currently sharing track with LUL
- Bakerloo line - Queen's Park to Harrow & Wealdstone, shared with London Overground Euston to Watford Junction service
- District line - Gunnersbury to Richmond, shared with London Overground North London Line
- District line - East Putney to Wimbledon, shared with South West Trains services when diverted
- Metropolitan line - Harrow-on-the-Hill to Amersham, shared with Chiltern Railways Marylebone to Aylesbury service
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 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 The Rail Vehicle Accessibility (Non Interoperable Rail System) Regulations 2010 (RVAR 2010) by 2020.
Stock on sub-surface lines 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).
Ventilation and cooling
When the Bakerloo line opened in 1906 it was advertised with a maximum temperature of 16 °C (60 °F), but over time the tube tunnels have warmed up. In 1938 approval was given for a ventilation improvement programme, and a refrigerating unit was installed in a lift shaft at Tottenham Court Road. More recently, temperatures of 47 °C (117 °F) were reported in the 2006 European heat wave. It was pointed out in 2002 that, if animals were being transported, temperatures on the Tube would break European Commission animal welfare laws. A 2000 study reported that air quality was seventy-three times worse than at street level, with a passenger breathing the same mass of particulates during a twenty minute journey on the Northern line as smoking a cigarette. The main purpose of the London Underground's ventilation fans is to extract hot air from the tunnels, and fans across the network are being refurbished, although complaints of noise from local residents preclude their use at full power at night.
In June 2006 a groundwater cooling system was installed at Victoria station. In 2012, air-cooling units were installed on platforms at Green Park station using cool deep groundwater and at Oxford Circus using chiller units at the top of an adjacent building. New air-conditioned trains are being introduced on the sub-surface lines, but space is limited on tube trains for air-conditioning units and these would heat the tunnels even more. The Deep Tube Programme, investigating replacing the trains for the Bakerloo and Piccadilly lines, is looking for trains with better energy conservation and regenerative braking, on which it might be possible to install a form of air-conditioning.
Lifts and escalators
Originally access to the deep-tube platforms was by a lift. Each lift was manned, and at some quiet stations in the 1920s the ticket office was moved into the lift, or it was arranged that the lift could be controlled from the ticket office. The first escalator on the London Underground was installed in 1911 between the District and Piccadilly platforms at Earl's Court and from the following year new deep-level stations were provided with escalators instead of lifts. The escalators had a diagonal shunt at the top landing. In 1921 a recorded voice instructed passengers to stand on the right and signs followed in World War II. Travellers were asked to stand on the right so that anyone wishing to overtake them at the end would have an extra section of moving stairway. The first 'comb' type escalator was installed in 1924 at Clapham Common. In the 1920s and 1930s many lifts were replaced by escalators.
There are 426 escalators on the London Underground system and the longest, at 60 metres (200 ft), is at Angel. The shortest, at Stratford, gives a vertical rise of 4.1 metres (13 ft). There are 164 lifts, and numbers have increased in recent years due to a programme to increase accessibility.
Wi-Fi and mobile phone reception
In summer 2012 London Underground, in partnership with Virgin Media, tried out Wi-Fi hot spots in many stations, but not in the tunnels, that allowed passengers free internet access. The free trial proved successful and was extended to the end of 2012 whereupon it switched to a service freely available to subscribers to Virgin Media and others, or as a paid-for service. Even without subscribing to paid-for Wi-Fi services, the free signals can be used by smartphones to alert a traveller that they have arrived at a specific station. It is not currently possible to use mobile phones underground, and a project to extend the network before the 2012 Olympics was abandoned due to commercial and technical difficulties.
Proposed improvements and expansions
Crossrail is under construction and expected to open in 2018, providing a new underground route across central London integrated with, but not part of the London Underground system. Two options are being considered for the route of Crossrail 2 on a north-south alignment across London, with hopes that it could be open by 2033.
Croxley Rail Link
The Croxley Rail Link involves re-routing the Metropolitan line's Watford branch from the current terminus at Watford over part of the disused Croxley Green branch line to Watford Junction with stations at Cassiobridge, Watford Vicarage Road and Watford High Street. Funding was agreed in December 2011, and the final approval for the extension was given on 24 July 2013. Construction work is expected to start in June 2014 and end by January 2016.
Northern line extension to Battersea
It is planned that the Northern line be extended to Battersea with an intermediate station at Nine Elms. In December 2012, the Treasury confirmed that it will provide a guarantee that allows the Greater London Authority to borrow up to £1 billion from the Public Works Loan Board, at a preferential rate, to finance the construction of the line. In April 2013, Transport for London applied for the legal powers of a Transport and Works Act Order to proceed with the extension, with a decision expected in the summer of 2013. The stations could open in 2020.
Bakerloo line extension to Camberwell
In 1931 the extension of the Bakerloo line from Elephant & Castle to Camberwell was approved, with stations at Albany Road and an interchange at Denmark Hill. However, with post-war austerity, the plan was abandoned. In 2006 Ken Livingstone, the then Mayor of London, announced that within twenty years Camberwell would have a tube station. Transport for London has indicated that extensions, possibly to Camberwell, could play a part in the future transport strategy for South London over the coming years. However, no such planning of an extension has been revealed. There have also been many other proposals to extend the line to Streatham, Lewisham, and even beyond Lewisham, taking over the suburban Hayes line via Catford Bridge to relieve some capacity on the suburban rail network.
Central line extension to Uxbridge
The signalling system on the Northern line is being replaced to increase capacity on the line by 20 per cent by the end of 2014. Capacity can be increased further if the operation of the Charing Cross and Bank branches are separated. New S Stock trains are being introduced on the sub-surface (District, Metropolitan, Hammersmith & City and Circle) lines, and the track, electrical supply and signalling systems are being upgraded in a programme to increase peak-hour capacity, which is scheduled for completion by the end of 2018. A control room for the sub-surface network has been built in Hammersmith and an automatic train control (ATC) system is to replace signalling equipment installed from the 1940s. Bombardier won the contact in June 2011, but was released by agreement in December 2013 and London Underground are looking for a new contractor. Options for new trains for the Bakerloo and Piccadilly lines are being considered.
The Underground uses Transport for London's zonal fare system to calculate fares. There are nine zones, zone 1 being the central zone, which includes the loop of the Circle line with a few stations to the south of River Thames. The only London Underground stations in Zones 7 to 9 are on the Metropolitan line beyond Moor Park, outside Greater London. Some stations are in two zones, and the cheapest fare applies. Paper tickets or the contactless Oyster card can be used for travel. Single and return tickets are available in either format, but Travelcards (season tickets) for longer than a day are available only on Oyster cards.
TfL introduced the Oyster card in 2003; this is a pre-payment smartcard with an embedded contactless RFID chip. It can be loaded with Travelcards and used on the Underground, the Overground, buses, trams, the Docklands Light Railway, and National Rail services within London. Fares for single journeys are cheaper than paper tickets, and a daily cap limits the total cost in a day to the price of a Day Travelcard. The Oyster card must be 'touched in' at the start and end of a journey, otherwise it is regarded as 'incomplete' and the maximum fare charged. In March 2012 the cost of this in the previous year to travellers was £66.5 million. Contactless payment cards can be used instead of an Oyster card on buses, and this will be extended to London Underground, London Overground, DLR and most National Rail services in London from 16 September 2014.
A concessionary fare scheme is operated by London Councils for residents who are disabled or meet certain age criteria. Residents born before 1951 were eligible after their 60th birthday, whereas those born in 1955 will need to wait until they are 66. Called a "Freedom Pass" it allows free travel on TfL-operated routes at all times and is valid on some National Rail services within London at weekends and after 09:30 on Monday to Fridays. Since 2010, the Freedom Pass has included an embedded holder's photograph; it lasts five years between renewals.
In addition to automatic and staffed ticket gates, the Underground is patrolled by both uniformed and plain-clothes ticket inspectors with hand-held Oyster-card readers. Passengers travelling without a valid ticket must pay a penalty fare of £80 (or £40 if paid within 21 days) and can be prosecuted for fare evasion under the Regulation of Railways Act 1889 and Transport for London Byelaws.
Hours of operation
The tube closes overnight, the first trains running from about 05:00 to just after 01:00 the following morning, with later starting times at weekends. The nightly closures are used for maintenance, but some lines stay open at New Year and close later during major public events such as the 2012 London Olympics. London Underground are planning to run a 24-hour service on Friday and Saturday nights on some lines at the weekend from 2015, following completion of upgrades. Some lines are closed for scheduled engineering work at weekends to update the system.
The Underground runs limited service on Christmas Eve with some lines closing early, and does not operate on Christmas Day. Since 2010 a dispute between London Underground and trade unions over holiday pay has resulted in a limited service on Boxing Day.
Accessibility by people with limited mobility was not considered when most of the system was built, and before 1993 fire regulations prohibited wheelchairs on the underground. The stations on the Jubilee Line Extension, opened in 1999, were designed for accessibility, but retrofitting accessibility features to the older stations is a major investment that is planned to take over twenty years. A 2010 London Assembly Report concluded that over ten per cent of the people of London had reduced mobility and, with an ageing population, numbers will increase in the future.
TfL produces a version of the tube map that indicates stations that are step-free from street to platforms. There can also be a step from platform to train as large as 12 inches (300 mm) and a gap between the train and curved platforms, and these distances are marked on the map. Access from platform to train at some stations can be assisted using a boarding ramp operated by staff, and a section has been raised on some platforms to reduce the step.
As of December 2012[update] there are 66 stations with step-free access from platform to train, and there are plans to provide step-free access at another 28 in ten years. By 2016 a third of stations are to have platform humps that reduce the step from platform to train. New trains, such as those being introduced on the sub-surface network, have access and room for wheelchairs, improved audio and visual information systems and accessible door controls.
Delays and overcrowding
During peak hours, stations can get so crowded they need to be closed. Passengers may not get on the first train and the majority of passengers do not find a seat on their trains, some trains having more than four passengers every square metre. When asked, passengers report overcrowding as the aspect of the network that they are least satisfied with, and overcrowding has been linked to poor productivity and potential poor heart health. Capacity increases have been overtaken by increased demand, and peak overcrowding has increased by 16 per cent since 2004/5.
Compared with 2003/4, the reliability of the network had increased in 2010/11, with Lost Customer Hours reduced from 54 million to 40 million. Passengers are entitled to a refund if their journey is delayed by 15 minutes or more due to circumstances within the control of TfL, and in 2010, 330,000 passengers of a potential 11 million Tube passengers claimed compensation for delays. A number of mobile phone apps and services have been developed to help passengers claim their refund more efficiently.
London Underground is authorised to operate trains by the Office of Rail Regulation, and the latest Safety Certification and Safety Authorisation is valid until 2017. On 19 March 2013[update] there had been 310 days since the last major incident, when a passenger had died after falling on the track.
In November 2011 it was reported that 80 people had committed suicide in the previous year on the London Underground, up from 46 in 2000. Most platforms at deep tube stations have pits, often referred to as 'suicide pits', beneath the track. These were constructed in 1926 to aid drainage of water from the platforms, but halve the likelihood of a fatality when a passenger falls or jumps in front of a train.
Design and the arts
Early maps of the Metropolitan and District railways were city maps with the lines superimposed, and the District published a pocket map in 1897. A Central London Railway route diagram appears on a 1904 postcard and 1905 poster, similar maps appearing in District Railway cars in 1908. In the same year, following a marketing agreement between the operators, a joint central area map that included all the lines was published. A new map was published in 1921 without any background details, but the central area was squashed, requiring smaller letters and arrows. Harry Beck had the idea of expanding this central area, distorting geography, and simplifying the map so that the railways appeared as straight lines with equally spaced stations. He presented his original draft in 1931, and after initial rejection it was first printed in 1933. Today's tube map is an evolution of that original design, and the ideas are used by many metro systems around the world.
Currently the standard tube map shows the Docklands Light Railway, London Overground and Emirates Air Line as well as the London Underground; a more detailed map covering a larger area, published by National Rail and Transport for London, includes London Tramlink and suburban railway services. The tube map came second in a BBC and London Transport Museum poll asking for a favourite UK design icon of the 20th century and the underground's 150th anniversary was celebrated by a Google Doodle on the search engine.
While the first use of a roundel in a London transport context was the trademark of the London General Omnibus Company registered in 1905, it was first used on the Underground in 1908 when the UERL placed a solid red circle behind station nameboards on platforms to highlight the name. The word "UNDERGROUND" was placed in a roundel instead of a station name on posters in 1912 by Charles Sharland and Alfred France, as well as on undated and possibly earlier posters from the same period. Frank Pick thought the solid red disc cumbersome and took a version where the disc became a ring from a 1915 Sharland poster and gave it to Edward Johnston to develop, and registered the symbol as a trademark in 1917. The roundel was first printed on a map cover using the Johnston typeface in June 1919, and printed in colour the following October.
After the UERL was absorbed into the London Passenger Transport Board in 1933, it used forms of the roundel for buses, trams and coaches, as well as the Underground. The words "London Transport" were added inside the ring, above and below the bar. The Carr-Edwards report, published in 1938 as possibly the first attempt at a graphics standards manual, introduced stricter guidelines. Between 1948 and 1957 the word "Underground" in the bar was replaced by "London Transport". As of 2013[update], forms of the roundel, with differing colours for the ring and bar, is used for other TfL services, such as London Buses, Tramlink, London Overground, London River Services and Docklands Light Railway. Crossrail, due to open in 2018, is to be identified with a roundel. The 100th anniversary of the roundel was celebrated in 2008 by TfL commissioning 100 artists to produce works that celebrate the design.
Seventy of the 270 London Underground stations use buildings that are on the Statutory List of Buildings of Special Architectural or Historic Interest, and five have entrances in listed buildings. The Metropolitan Railway's original seven stations were inspired by Italianate designs, with the platforms lit by daylight from above and by gas lights in large glass globes. Early District Railway stations were similar and on both railways the further from central London the station the simpler the construction. The City & South London Railway opened with red-brick buildings, designed by Thomas Phillips Figgis, topped with a lead-covered dome that contained the lift mechanism. The Central London Railway appointed Harry Bell Measures as architect, who designed its pinkish-brown steel-framed buildings with larger entrances.
In the first decade of the 20th century Leslie Green established a house style for the tube stations built by the UERL, which were clad in ox-blood faience blocks. Green pioneered using building design to guide passengers with direction signs on tiled walls, with the stations given a unique identity with patterns on the platform walls. Many of these tile patterns survive, though a significant number of these are now replicas. Harry W. Ford was responsible for the design of at least 17 UERL and District Railway stations, including Barons Court and Embankment, and claimed to have first thought of enlarging the U and D in the UNDERGROUND wordmark. The Met's architect Charles Walter Clark had used a neo-classical design for rebuilding Baker Street and Paddington Praed Street stations before World War I and, although the fashion had changed, continued with Farringdon in 1923. The buildings had metal lettering attached to pale walls. Clark would later design "Chiltern Court", the large, luxurious block of apartments at Baker Street, that opened in 1929. In the 1920s and 1930s, Charles Holden designed a series of modernist and art-deco stations some of which he described as his 'brick boxes with concrete lids'. Holden's design for the Underground's headquarters building at 55 Broadway included avant-garde sculptures by Jacob Epstein, Eric Gill and Henry Moore.
When the Central line was extended east, the stations were simplified Holden proto-Brutalist designs, and a cavernous concourse built at Gants Hill in honour of early Moscow Metro stations. Misha Black was appointed design consultant for the 1960s Victoria line, contributing to the line's uniform look, but each station had an individual tile motif. The stations of the 1990s extension of the Jubilee line were much larger than before and designed by architects such as Norman Foster and Michael Hopkins.
Many platforms have unique interior designs to help passenger identification. The tiling at Baker Street incorporates repetitions of Sherlock Holmes's silhouette and at Tottenham Court Road semi-abstract mosaics by Eduardo Paolozzi feature musical instruments, tape machines and butterflies. Robyn Denny designed the murals on the Northern line platforms at Embankment.
The first posters used a number of type fonts, as was contemporary practice, and station signs used sans serif block capitals. The Johnston typeface was developed in upper and lower case in 1916, and a complete set of blocks, marked Johnston Sans, was made by the printers the following year. A bold version of the capitals was developed by Johnston in 1929. The Met changed to a serif letterform for its signs in the 1920s, used on the stations rebuilt by Clark. However, Johnston was adopted systemwide after the formation the LPTB in 1933 and the LT wordmark was applied to locomotives and carriages. Johnston was redesigned, becoming New Johnston, for photo-typesetting in the early 1980s when Elichi Kono designed a range that included Light, Medium and Bold, each with its italic version. The typesetters P22 developed today's electronic version, sometimes called TfL Johnston, in 1997.
Posters and patron of the arts
Early advertising posters proclaimed the advantages of travelling using various letter forms. Graphic posters first appeared in the 1890s, and it became possible to print colour images economically in the early 20th century. The Central London Railway used colour illustrations in their 1905 poster, and from 1908 the underground group, under Pick's direction, used images of country scenes, shopping and major events on posters to encourage use of the tube. Pick found he was limited by the commercial artists the printers used, and so commissioned work from artists and designers such as Dora Batty, Edward McKnight Kauffer, the cartoonist George Morrow, Herry (Heather) Perry, Graham Sutherland, Charles Sharland and the sisters Anna and Doris Zinkeisen. According to Ruth Artmonsky, over 150 women artists were commissioned by Pick and latterly Christian Barman to design posters for London Underground, London Transport and London County Council Tramways. The Johnson Sans letter form began appearing on posters from 1917. The Met, strongly independent, used images on timetables and on the cover of its Metro-land guide that promoted the country it served for the walker, visitor and later the house-hunter. By the time London Transport was formed in 1933 the UERL was considered a patron of the arts and over 1000 works were commissioned in the 1930s, such as the cartoon images of Charles Burton and Kauffer's later abstract cubist and surrealist images.
Harold Hutchison became London Transport publicity officer in 1947, after World War II and nationalisation, and introduced the "pair poster", where an image on a poster was paired with text on another. Numbers of commissions dropped, to eight a year in the 1950s and just four a year in the 1970s, with images from artists such Harry Stevens and Tom Eckersley. Art on the Underground was introduced in 1986 by Henry Fitzhugh to revive London Transport as a patron of the arts with the Underground commissioning six works a year, judged first on artistic merit. In that year Peter Lee, Celia Lyttleton and a poster by David Booth, Malcolm Fowler and Nancy Fowler were commissioned. Today commissions range from the pocket tube map cover to installations in a station. Similarly, Poems on the Underground has commissioned poetry since 1986 that are displayed in carriages.
In popular culture
The Underground (including several fictitious stations) has been featured in many movies and television shows, including Skyfall, Die Another Day, Sliding Doors, An American Werewolf in London, Creep, Tube Tales and Neverwhere. The London Underground Film Office received over 200 requests to film in 2000. The Underground has also featured in music such as The Jam's "Down in the Tube Station at Midnight" and in literature such as the graphic novel V for Vendetta. Popular legends about the Underground being haunted persist to this day.
Call of Duty: Modern Warfare 3 has a level named Underground where most of the level takes place between the dockyards and Westminster while the player and a team of SAS attempt to take down cargo being shipped using London Underground. The London Underground map serves as a playing field for the conceptual game of Mornington Crescent (which is named after a station on the Northern line) and the board game The London Game.
- London Underground Aldgate tube station plays an important role in the Sherlock Holmes story The Adventure of the Bruce-Partington Plans (published in the anthology His Last Bow).
- Charles Pearson (1793–1862) suggested an underground railway in London in 1845 and from 1854 promoted a scheme that eventually became the Metropolitan Railway.
- John Fowler (1817–1898) was the railway engineer that designed the Metropolitan Railway.
- Edward Watkin (1819–1901) was chairman of the Metropolitan Railway from 1872 to 1894.
- James Henry Greathead (1844–1896) was the engineer that dug the Tower Subway using a method using a wrought iron shield patented by Peter W. Barlow, and later used the same tunnelling shield to build the deep-tube London & South London and Central London railways.
- Charles Yerkes (1837–1905) was an American who founded the Underground Electric Railways Company of London (UERL) in 1902, which opened three tube lines and electrified the District Railway.
- Edgar Speyer (1862–1932) Financial backer of Yerkes who served as UERL chairman from 1906 to 1915 during its formative years.
- Albert Stanley (1874–1948) was manager of the UERL from 1907, and became the first chairman of the London Passenger Transport Board (LPTB) in 1933.
- Frank Pick (1878–1941) was UERL publicity officer from 1908, commercial manager from 1912 and joint managing director from 1928. He was chief executive and vice chairman of the LPTB from 1933 to 1940. It was Pick that commissioned Edward Johnston to create the typeface and redesign the roundel, and established the Underground's reputation as patrons of the arts as users of the best in contemporary poster art and architecture.
- Robert Selbie (1868–1930) was manager of the Metropolitan Railway from 1908 until his death, marketing it using the Metro-land brand.
- Edward Johnston (1872–1944) developed the Johnston Sans typeface, still in use today on the London Underground.
- Harry Beck (1902–1974) designed the tube map, named in 2006 as a British design icon.
- MacDonald Gill (1884–1947), cartographer credited with drawing, in 1914, "the map that saved the London Underground".
- London at Wikipedia books
- List of London Underground stations
- List of busiest London Underground stations
- Timeline of the London Underground
- Tube Challenge
- "About TfL - What we do - London Underground - Facts & figures". Transport for London. Retrieved 17 June 2014.
- "Annual Report and Statement of Accounts 2012/2013" (pdf). Transport for London. July 2013. p. 12. Retrieved 13 April 2014.
- "Performance data almanac". Transport for London (see: http://www.tfl.gov.uk/corporate/publications-and-reports/underground-services-performance ). Period 7 2013/14. Archived from the original on 2 April 2014.
- Wolmar (2004), p. 135.
- "Annual Report and Statement of Accounts 2011/12". TfL. pp. 71, 74. Retrieved 13 April 2014. "Fares revenue on LU was £1,981m... Operating expenditure on the Underground increased by 6.2 per cent to £2,178m"
- Croome & Jackson (1993), Preface.
- "Oyster card celebrates 150th Tube anniversary". BBC News. 10 December 2012. Retrieved 10 January 2013.
- Peacock (1970), pp. 37–38.
- Day & Reed (2010), p. 8.
- Jackson (1986), p. 19.
- Day & Reed (2010), pp. 8, 14.
- Simpson (2003), p. 16.
- Day & Reed (2010), pp. 18–24.
- Day & Reed (2010), pp. 27–28.
- Day & Reed (2010), pp. 10–11.
- Day & Reed (2010), p. 26.
- Day & Reed (2010), p. 33.
- Day & Reed (2010), p. 32.
- Day & Reed (2010), pp. 40–45.
- Day & Reed (2010), pp. 50–51.
- Day & Reed (2010), pp. 52–56.
- Day & Reed (2010), pp. 50, 53.
- Day & Reed (2010), pp. 60–61.
- Day & Reed (2010), pp. 62–63.
- Day & Reed (2010), pp. 69–72, 78.
- Green (1987), p. 30.
- Green (1987), pp. 24–28.
- Horne (2003), p. 51.
- Green (1987), p. 35.
- Green (1987), p. 33.
- Day & Reed (2010), p. 94.
- Day & Reed (2010), p. 122.
- Day & Reed (2010), pp. 84–88.
- Jackson (1986), pp. 134, 137.
- Day & Reed (2010), p. 98–103, 111.
- Day & Reed (2010), p. 110.
- Green (1987), p. 46.
- Day & Reed (2010), p. 118.
- Day & Reed (2010), p. 116.
- Day & Reed (2010), pp. 131, 133–134.
- Day & Reed (2010), pp. 135–136.
- Horne (2006), p. 73.
- Day & Reed (2010), pp. 144–145.
- Green (1987), p. 54.
- Green (1987), pp. 56–57.
- Green (1987), p. 56.
- Day & Reed (2010), pp. 160–162, 166–168, 171.
- Green (1987), pp. 55–56.
- Day & Reed (2010), pp. 178–181.
- Day & Reed (2010), pp. 206–211.
- Green (1987), pp. 65–66.
- Day & Reed (2010), pp. 193–194.
- Croome & Jackson (1993), pp. 474–476.
- Day & Reed (2010), pp. 186–187.
- Croome & Jackson (1993), p. 468.
- Day & Reed (2010), pp. 212–214.
- Day & Reed (2010), pp. 215, 221.
- Day & Reed (2010), p. 216.
- Rose (2007).
- "East London line officially opens". BBC News. 27 April 2010. Retrieved 2 April 2010.
- "Circle Line extended to the west". BBC News. 5 March 2009. Retrieved 24 November 2011.
- "A brief history of the Underground - London Underground milestones". Transport for London. Retrieved 6 June 2014.
- "About TfL - How we work - How we are governed - Subsidiary companies". Transport for London. Retrieved 17 June 2014.
- "Chief Officers". Transport for London. Archived from the original on 22 January 2014.
- "About". London TravelWatch. Retrieved 12 February 2011.
- "About TfL - What we do - London Underground". Transport for London. Retrieved 4 June 2014.
- "Detailed London Transport Map". carto.metro.free.fr. Retrieved 1 December 2012.
- Croome & Jackson (1993), pp. 26, 33, 38, 81.
- Croome & Jackson (1993), pp. 327–328.
- Martin, Andrew (26 April 2012). Underground, Overground: A Passenger's History of the Tube. London: Profile Books. pp. 137–138. ISBN 978-1-84765-807-4. Retrieved 7 December 2012.
- London Underground. "Corporate identity—colour standards". Transport for London. Retrieved 22 December 2007.
- Horne (2006), pp. 13, 24.
- Ovenden (2013), p. 220.
- "Commissioner’s Report". Transport for London. 26 March 2014. pp. 3–4. Retrieved 2 April 2014.
- Railway Track Diagrams Vol. 5 (2nd ed.). Quail Map Company. 2002.
- Brown (2012).
- Table 115 National Rail timetable, May 2013
- Maund, Richard (2013). Passenger Train Services over Unusual Lines.
- Peacock (1970), p. 67.
- "Rolling Stock". Transport for London. Retrieved 18 June 2014.
- Day & Reed (2010), p. 159.
- Day & Reed (2010), p. 205.
- "Rolling Stock Data Sheet". Transport for London. March 2007. Archived from the original on 4 October 2013.
- Connor, Piers (January 2013). "Deep tube transformation". Modern Railways. pp. 44–47.
- "Making transport more accessible to all". Department for Transport. 3 October 2012. Retrieved 17 March 2013.
- Hardy (2002), p. 6.
- Croome & Jackson (1993), pp. 253–254.
- Griffiths, Emma (18 July 2006). "Baking hot at Baker Street". BBC News. Retrieved 31 March 2013.
- "London's Tube 'unfit for animals'". The Daily Telegraph (London). 28 August 2002. Retrieved 31 March 2013. (subscription required)
- Croxford, Ben (4 December 2003). "Environmental Quality in Underground Railways". University College London. Retrieved 5 November 2013.
- Murray, Dick (23 August 2002). "Passengers choke on the Tube". London Evening Standard. Retrieved 31 March 2013.
- Westgate, Stuart; Gilby, Mark (8 May 2007). "Meeting Report: Cooling the tube". LURS. Retrieved 31 March 2013.
- "Water pump plan to cool the Tube". BBC News. 8 June 2006. Retrieved 31 March 2013.
- "Work begins to cool the platforms at two major central London stations" (Press release). Transport for London. 17 February 2012. Archived from the original on 30 March 2014. Retrieved 27 March 2014.
- Abbott, James (January 2013). "Sub-surface renewal". Modern Railways. pp. 38–41.
- Croome & Jackson (1993), pp. 26, 35, 39, 87–89.
- Croome & Jackson (1993), p. 540.
- Croome & Jackson (1993), pp. 114, 542.
- Day & Reed (2010), p. 59.
- Croome & Jackson (1993), pp. 154, 546.
- Malvern, Jack (21 October 2009). "Mystery over Tube escalator etiquette cleared up by restored film". The Times (London). (subscription required)
- Day & Reed (2010), p. 93.
- "Step-free access". Transport for London. No date. Archived from the original on 2 April 2013.
- "Virgin Media extends free wi-fi on London Underground until 2013". Metro (London). 17 October 2012. Retrieved 10 November 2012.
- "Station Wifi". Transport for London. Retrieved 12 March 2013.[dead link]
- Lei W (24 December 2013). "Tube Relax (London):Have you ever missed your tube stops?". Google Play (London). Retrieved 4 January 2014.
- Mulholland, Hélène (1 April 2011). "Plans for mobile network on London underground shelved". The Guardian (London). Retrieved 1 April 2013.
- "A World-Class new railway for London and the South-East". Crossrail. Retrieved 6 February 2013.
- "Crossrail business case - Summary Report". Crossrail. July 2010. p. 6. Retrieved 6 February 2013.
- "Crossrail 2: Supporting London's growth". London First. February 2013. Retrieved 10 March 2013.
- "Transport schemes given £854m in government funding". BBC News. 14 December 2011. Retrieved 14 December 2011.
- "Watford Metropolitan line Tube extension gets go-ahead". BBC News. 24 July 2013. Retrieved 24 July 2013.
- "Croxley Rail Link". Transport for London. No date. Archived from the original on 5 November 2013.
- Murphy, Joe (5 December 2012). "Boost for Battersea as Osborne puts power station on the Tube". London Evening Standard. Retrieved 19 January 2013.
- "Northern line extension". Transport for London. 2013. Archived from the original on 3 December 2013.
- Rhys, Paul (10 February 2006). "Tube line 'may extend south within 20 years'". ICSouthLondon. Archived from the original on 11 April 2006. Retrieved 1 October 2009.
- "CamberwellOnline Blog » Camberwell Tube Station in 2026?". Camberwellonline.co.uk. 11 February 2006. Retrieved 1 December 2013.
- Coombs, Dan (17 June 2011). "Extending Central line to Uxbridge will cut traffic". Uxbridge Gazette. Retrieved 15 July 2011.
- "Upgrade plan (leaflet)". Transport for London. 17 July 2013. Archived from the original on 17 July 2013. Retrieved 2 March 2013.
- "Northern line upgrade". Transport for London. Archived from the original on 22 January 2014.
- "London Underground and Bombardier agree to re-let signalling contract" (Press release). Transport for London. 31 December 2013. Retrieved 2 January 2014.[dead link]
- Stewart, Rob (January 2013). "Cityflo 650 to control the SSR". Modern Railways. pp. 42–43.
- "London Rail & Tube Services Map". Transport for London. May 2014. Retrieved 18 June 2014.
- "Where can I buy my ticket?". Transport for London. January 2012. Retrieved 18 June 2014.
- "Fares & payments - Fares - Tube, DLR and London Overground". Transport for London. Retrieved 18 June 2014.
- "Fares & payments - Ticket types". Transport for London. Retrieved 18 June 2014.
- "Travelcards make way for 'oyster'". BBC News. 30 June 2003. Retrieved 7 March 2012.
- "Getting around with Oyster". Transport for London. January 2010. Archived from the original on 26 September 2012.
- "Fares & payments - Oyster - Using your Oyster card - Capping". Transport for London. Retrieved 18 June 2014.
- "Fares & payments - Oyster - Using your Oyster card - Incomplete journeys". Transport for London. Retrieved 18 June 2014.
- Murray, Dick (7 March 2012). "The £66.5 million cost of not touching out your Oyster card". London Evening Standard. Retrieved 30 March 2013.
- "Freedom Pass". London Councils. Retrieved 30 March 2013.
- "Freedom Pass age change". London Councils. November 2011. Retrieved 30 March 2013.
- "Freedom Pass Map". London Councils. December 2012. Retrieved 30 March 2013.
- "Freedom passes – Hammersmith & Fulham". London Borough of Hammersmith & Fulham. 17 November 2010. Retrieved 4 February 2011.
- "Revenue Enforcement and Prosecutions Policy". Transport for London. 1 November 2012. Archived from the original on 30 March 2014. Retrieved 27 March 2014.
- "Tickets: Fines and Penalties". Transport for London. Archived from the original on 14 March 2013.
- "Later London Underground service being considered". BBC News. 30 January 2013. Retrieved 1 April 2013.
- Beard, Matthew (30 January 2013). "Party on, London... Tube will run an hour later on Fridays and Saturdays". London Evening Standard. Retrieved 1 April 2013.
- "Transport in London over Christmas and New Year's Eve". Time Out London. Retrieved 1 April 2013.
- "London 2012 Olympics: Tube to shut hour later, TfL says". BBC News. 30 March 2011. Retrieved 1 April 2013.
- Topham, Gwyn (21 November 2013). "London tube to run all night at weekends but 750 jobs to go". The Guardian. Retrieved 21 November 2013.
- "Planned Works Calendar". Transport for London. 2013. Retrieved 1 April 2013.[dead link]
- "London Tube strike on Boxing Day". BBC News. 17 December 2012. Retrieved 1 April 2013.
- "The London Underground – An accessible future?". disability horizons. 24 July 2011. Retrieved 20 April 2013.
- LA Transport Committee (2010), p. 11.
- LA Transport Committee (2010), p. 9.
- "Step-free Tube guide". Transport for London. May 2014. Retrieved 18 June 2014.
- "Transport accessibility - Wheelchair access & avoiding stairs". Transport for London. Retrieved 18 June 2014.
- TfL (2012), p. 9.
- TfL (2012), p. 16.
- TfL (2012), p. 18.
- LA Transport Committee (2009), p. 55.
- "Overcrowding on Public Transport". House of Commons Transport Committee. 17 September 2003. p. 17. Retrieved 2 April 2013.
- LA Transport Committee (2009), p. 12.
- LA Transport Committee (2009), p. 13.
- LA Transport Committee (2011), pp. 22–23.
- LA Transport Committee (2011), pp. 12–13.
- "Fares & payments - Replacements & refunds - Charter refunds". Transport for London. Retrieved 18 June 2014.
- "London Underground: Millions not claiming Tube refund". BBC News. 9 March 2011.
- Booth, Nick (11 August 2011). "Apps that help you get money back on Delays". City AM (London). Retrieved 2 April 2013.
- "Safety Authorisaton". Office of Rail Regulation. 9 February 2012. Retrieved 19 April 2013.
- "Quarterly Health, Safety and Environment Performance Reports – Quarter 3, 2012/13". Transport for London: Safety and Sustainability Panel. 19 March 2013. Retrieved 19 April 2013.[dead link]
- "Quarterly Health, Safety and Environment Performance Reports - Quarter 4, 2011/12". Transport for London: Safety and Sustainability Panel. 10 July 2012. Retrieved 19 April 2013.[dead link]
- "Tube suicides rise 74% over last 10 years". Metro (London). 10 November 2011. Retrieved 19 April 2013.
- Coats, T.J.; Walter, D. P. (9 October 1999). "Effect of station design on death in the London Underground: observational study". British Medical Journal (British Medical Association) 319 (7215): 957. doi:10.1136/bmj.319.7215.957. PMC 28249. PMID 10514158. Retrieved 11 July 2008.
- Croome & Jackson (1993), p. 158.
- "Pit falls halve tube deaths". BBC News. 8 October 1999. Retrieved 20 April 2013.
- Ovenden (2013), pp. 21, 28–30.
- Ovenden (2013), p. 51.
- Ovenden (2013), pp. 52–53, 56.
- Ovenden (2013), p. 93.
- See a copy on commons
- Ovenden (2013), p. 91.
- Ovenden (2013), p. 142.
- "Design Classics: Harry Beck". Transport for London. Archived from the original on 30 March 2014. Retrieved 27 March 2014.
- Ovenden (2013), pp. 152–153, 168–169.
- "Standard Tube Map". Transport for London. December 2013. Retrieved 26 March 2014.
- "Tube map voted a UK design icon" (Press release). Transport for London. 3 March 2006. Archived from the original on 27 June 2012.
- Brown, Matt (9 January 2013). "London underground's 150th birthday celebrated in Google doodle". The Guardian (London). Retrieved 9 January 2013.
- "Google Doodle Marks 150 Years Of The London Underground". Londonist. 9 January 2013. Retrieved 9 January 2013.
- "History of the roundel". London Transport Museum. Retrieved 12 April 2013.
- Ovenden (2013), pp. 86–88.
- Ovenden (2013), p. 67.
- Ovenden (2013), pp. 112–113.
- Ovenden (2013), pp. 126–127.
- Ovenden (2013), pp. 155, 186.
- Ovenden (2013), pp. 206, 218, 226.
- "Interchange signs standard". Sections 3–7: Transport for London. January 2009. Archived from the original on 21 August 2012.
- John Bull (January 2009). "Crossrail Gets Its Roundel". London Reconnections. Retrieved 12 April 2013.
- "100 artists celebrate 100 years of Tube logo" (Press release). Transport for London. 4 September 2008. Archived from the original on 12 April 2013.
- "Heritage Library: Underground: Line". Urban Design. Transport for London. No date. Retrieved 15 May 2013.
- Ovenden (2013), pp. 11, 18–19.
- Ovenden (2013), pp. 26, 28.
- Ovenden (2013), p. 35.
- Ovenden (2013), p. 38.
- Ovenden (2013), pp. 60–61, 70.
- Ovenden (2013), pp. 71–72.
- Fulcher, Kate (2012). "Conserving Heritage Tiles on the London Underground: Challenges and Approaches". Papers from the Institute of Archaeology (Ubiquity Press) 22: pp. 48–60. doi:10.5334/pia.402. Retrieved 17 March 2013.
- "London Underground's Edwardian Tile Patterns". Doug Rose. Retrieved 12 July 2007.
- Ovenden (2013), pp. 41, 63.
- Green (1987), p. 44.
- Ovenden (2013), pp. 150–152.
- Ovenden (2013), p. 146.
- "Underground Journeys: Charles Holden's designs for London Transport". V&A RIBA architecture partnership. undated. Retrieved 15 April 2013.
- Ovenden (2013), p. 213.
- Ovenden (2013), p. 214.
- Ovenden (2013), p. 234.
- Ovenden (2013), p. 243.
- Ovenden (2013), pp. 268–269.
- Day & Reed (2010), pp. 209–211.
- "Station architecture". Transport for London. Archived from the original on 20 October 2013. Retrieved 20 October 2013.
- Day & Reed 2010, pp. 188–189.
- Ovenden (2013), p. 21.
- Ovenden (2013), p. 23.
- Ovenden (2013), p. 112.
- Ovenden (2013), p. 122.
- Ovenden (2013), p. 139.
- Ovenden (2013), p. 156.
- Ovenden (2013), p. 250.
- Ovenden (2013), p. 52.
- "London Transport Posters: Frank Pick’s vision". Exploring 20th century London. Retrieved 21 April 2013.
- Jackson (1986), pp. 238–239.
- Ovenden (2013), p. 53.
- Ovenden (2013), pp. 88–89.
- Artmonsky (2012), p. 117.
- Ovenden (2013), pp. 124–125.
- Artmonsky (2012), pp. 106–111.
- Jackson (1986), p. 240.
- Ovenden (2013), p. 109.
- Ovenden (2013), pp. 160–161.
- Ovenden (2013), pp. 246–247.
- Ovenden (2013), p. 258.
- "Art on the Underground: History". Transport for London. Retrieved 21 April 2013.
- "Poems on the Underground". Transport for London. Retrieved 19 June 2014.
- Nicholas, Dean (7 September 2011). "Mapped: Fictional Stations On The London Underground". Londonist. Retrieved 7 September 2011.
- "Tube's movie stardom". BBC News. 28 December 2000. Retrieved 4 February 2011.
- "London Underground Ghosts". BBC h2g2. Retrieved 14 October 2007.
- Elizabeth Knowles, ed. (2006). "Mornington Crescent". A Dictionary of Phrase and Fable. Oxford University Press.
- Ovenden (2013), p. 10.
- Ovenden (2013), p. 11.
- Jackson (1986), p. 334.
- Ovenden (2013), p. 34.
- Day & Reed (2010), pp. 40, 52.
- Ovenden (2013), p. 40.
- Croome & Jackson (1993), pp. 49–51, 79–81.
- Lentin (2013), pp. 5, 6 and 63.
- Ovenden (2013), p. 63.
- Croome & Jackson (1993), pp. 512–513.
- Ovenden (2013), p. 69.
- Jackson (1986), pp. 194, 346.
- Ovenden (2013), p. 153.
- Artmonsky, Ruth (2012). Designing Women: Women Working in Advertising and Publicity from the 1920s to the 1960s (1st ed.). Artmonsky Arts. ISBN 978-0-9551994-9-3.
- Brown, Joe (1 October 2012). London Railway Atlas (3rd ed.). Ian Allan Publishing. ISBN 978-0-7110-3728-1.
- Croome, D.; Jackson, A (1993). Rails Through The Clay — A History Of London's Tube Railways (2nd ed.). Capital Transport. ISBN 1-85414-151-1.
- Day, John R; Reed, John (2010) . The Story of London's Underground (11th ed.). Capital Transport. ISBN 978-1-85414-341-9.
- Green, Oliver (1987). The London Underground — An illustrated history. Ian Allan. ISBN 0-7110-1720-4.
- Hardy, Brian (2002) . London Underground Rolling Stock (15th ed.). Harrow Weald: Capital Transport. ISBN 1-85414-263-1.
- Horne, Mike (2003). The Metropolitan Line. Capital Transport. ISBN 1-85414-275-5.
- Horne, Mike (2006). The District Line. Capital Transport. ISBN 1-85414-292-5.
- Jackson, Alan (1986). London's Metropolitan Railway. David & Charles. ISBN 0-7153-8839-8. Snippet view at google.com, retrieved 20 August 2012
- Lentin, Antony (2013). Banker, Traitor, Scapegoat, Spy? The Troublesome Case of Sir Edgar Speyer. Haus. ISBN 978-1-908323-11-8.
- Ovenden, Mark (2013). London Underground by Design. Penguin Books. ISBN 978-1-84614-417-2.
- Peacock, Thomas B. (1970). Great Western London Suburban Services. Oakwood Press. ASIN B0006C7PD2.
- Rose, Douglas (December 2007) . The London Underground: A Diagrammatic History (8th ed.). Capital Transport. ISBN 978-1-85414-315-0.
- Simpson, Bill (2003). A History of the Metropolitan Railway. Vol 1. Lamplight Publications. ISBN 1-899246-07-X.
- Wolmar, Christian (2004). The Subterranean Railway: how the London Underground was built and how it changed the city forever. Atlantic. ISBN 1-84354-023-1.
- Transport Committee (December 2009). "Too Close For Comfort: Passengers' experiences of the London Underground". London Assembly. Retrieved 1 April 2013.
- Transport Committee (November 2010). "Accessibility of the transport network". London Assembly. Retrieved 20 April 2013.
- Transport Committee (September 2011). "The State of the Underground". London Assembly. Retrieved 1 April 2012.
- "Your accessible transport network". Transport for London. December 2012. Retrieved 20 April 2013.
|Wikimedia Commons has media related to:|
|Look up Underground, aboveground, underground, or overground in Wiktionary, the free dictionary.|
- London Underground (Transport for London) Home page
- London Underground Morphing Map
- London Underground at DMOZ
- Last Tube Times for London Underground
- Stepen Knight’s London Underground Track Maps (archive link)
- London Underground API
- London Underground map and history