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Circle line
S7 Stock train at Wood Lane, bound for Hammersmith
Overview
Type	Sub-surface
System	London Underground
Stations	36
Ridership	114.6 million (2011/12)[a][1] passenger journeys
Colour on map	Yellow
Website	tfl.gov.uk
Operation
Opened	Infrastructure opened in stages between 1863 and 1884; shown as a separate line on the Tube map from 1949
Depot(s)	Hammersmith
Rolling stock	S7 Stock (7 cars per trainset)
Technical
Line length	27 km (17 mi)
Track gauge	4 ft 8 1⁄2 in (1,435 mm)
Transport for London rail lines London Underground Bakerloo Central Circle District Hammersmith & City Jubilee Metropolitan Northern Piccadilly Victoria Waterloo & City Other lines Docklands Light Railway Tramlink Overground TfL Rail v t e

The Circle line is a London Underground line in a spiralling shape, running from Hammersmith in the west to Edgware Road and then looping around central London back to Edgware Road. The railway is below ground in the central section and on the loop east of Paddington. Unlike London's deep-level lines, the Circle line tunnels are just below the surface and are of similar size to those on British main lines. Coloured yellow on the Tube map, the 17-mile (27 km) line serves 36 stations, including most of London's main line termini. Most of the route and all of the stations are shared with one or more of the three other sub-surface lines, namely the District, Hammersmith & City and Metropolitan lines. On the Circle and Hammersmith & City lines combined, over 114 million passenger journeys were recorded in 2011/12.

The first section became operational in 1863 when the Metropolitan Railway opened the world's first underground line between Paddington and Farringdon with wooden carriages and steam locomotives. The same year a select committee report recommended an "inner circle" of lines connecting the London railway termini, and the Metropolitan District Railway (commonly known as the District Railway) was formed to build the southern portion of the line. Due to conflict between the two companies it was not until October 1884 that the inner circle was completed. The line was electrified in 1905, and in 1933 the companies were amalgamated into the London Passenger Transport Board. In 1949 the Circle line appeared as a separate line for the first time on the Tube map. In 2009 the closed loop around the centre of London on the north side of the River Thames was broken at Edgware Road and extended west to become a spiral to Hammersmith.

The signalling system is being upgraded and the C Stock trains have recently been replaced by new seven-car S Stock trains, in a programme completed in 2015.

History

Origins

In 1863 the Metropolitan Railway, the world's first underground railway, opened in London between Paddington and Farringdon, connecting the Great Western Railway's relatively remote terminus at Paddington with Euston and King's Cross stations and the City, London's financial heart. In the same year a select committee report recommended an 'inner circle' of railway lines connecting the London termini that had been built or under construction. In the next year the Metropolitan District Railway (commonly known as the District Railway) was formed to build and operate a railway from South Kensington to Tower Hill. The Metropolitan western extension opened in 1868 from a new station at Paddington to South Kensington. By May 1870 the District railway had opened its line from West Brompton to Blackfriars via Gloucester Road and South Kensington, services being operated at first by the Metropolitan.^[2] In 1871 the District had built a terminus at Mansion House, and on 18 November 1876 the Met opened its terminus at Aldgate.^[3] Due to conflict between the two companies it took an Act of Parliament before further work was done on the inner circle.^[4] In 1882 the Metropolitan extended its line from Aldgate to a temporary station at Tower Hill and the District completed its line to Whitechapel. On 6 October 1884 the temporary station was replaced with a joint station and the inner circle was complete.^[5][6] The Metropolitan provided the clockwise or 'outer rail' trains, the District the 'inner rail' or anti-clockwise.^[7] Many breakdowns occurred, due to the unbalanced wear and tear inflicted upon the train and carriages caused by travelling in one (circular) direction which were hard to remove. Equally services were further disrupted due to petty squabbles between the two rivals including an incident whereby the Metropolitan Railway forcibly removed (using 3 trains) the District Railway's parked carriages which had been chained to the track.^[8] Historically there has been difficulty in relaying the direction of travel a train is headed in a clear message, variations such as "eastbound/westbound", "clockwise/counterclockwise" have caused ambiguity. Recently TfL considered stopping such announcements due to passengers becoming more accustomed to digital devices and now uses key stations along the route e.g. "via. High Street Kensington"^[9][10]

Other circle routes

As well as the inner circle, other routes circumnavigated London, although these were not complete loops. From 1872 the L&NWR began an "outer circle" service from Broad Street to Mansion House via Willesden Junction and Earl's Court, diverting an earlier service that had run to Victoria; and the GWR began a "middle circle" service from Moorgate to Mansion House via Latimer Road and Earl's Court. Both of these routes were cut back to Earl's Court: the "middle circle" in 1900 and the "outer circle" in 1909. The GWR service survived as a shuttle service from the Hammersmith & City line to Addison Road, now Kensington (Olympia), until 1940.^[7]

The Midland Railway briefly ran a "super outer circle" from St Pancras to Earl's Court from 1878 to 1880.^[7] Today London Overground runs services between Clapham Junction, Willesden Junction and Dalston Junction and between Dalston Junction and Clapham Junction.

Electrification

Wooden carriages were originally hauled by steam locomotives leading to smoke-filled stations and carriages, unpopular with passengers. At the start of the 20th century the District and Metropolitan were seeing increased competition in central London from the new electric underground tube lines and trams, and conversion to electric traction was seen as the way forward.^[11] Experiments were carried out on the Earl's Court to High Street Kensington section, and a jointly-owned six-carriage train began passenger service in 1900. Following this an AC system was suggested, and this was accepted by both parties. However, the District was looking for a way to raise the finance needed and in 1901 found an investor, the American Charles Yerkes. He formed the Underground Electric Railways of London (UERL), and his experience in the United States led him to favour DC, with third-rail pick-up similar to that in use on the City & South London Railway and Central London Railway. After arbitration by the Board of Trade the DC system was taken up, and the railways began electrifying the routes, using multiple-unit stock.^[12]

The District and Metropolitan Railways bought different designs of electric multiple unit. Both had open saloons; the Metropolitan trains with gated ends, the District B Stock with sliding doors in the middle of each car.^[13] When their introduction was attempted on 1 July 1905, a Metropolitan train overturned the third rail on the District Railway, requiring all Metropolitan trains to be modified before running again on the District lines. Full electric service started on 24 September, initially with 6-car trains, later reduced to 4-car.^[14] The Metropolitan trains were soon modified to enclose the gated end^[15] and eventually to add sliding doors in the middle.^[16] Trains were increased to 5 cars in 1918 and the Metropolitan introduced new stock in 1921, with three pairs of sliding double doors on trailer cars.^[17] In 1926 the Metropolitan took over all inner circle workings except for three trains on Sundays.^[18]

London Transport

On 1 July 1933 the Metropolitan and the District Railways were amalgamated with other Underground railways, tramway companies and bus operators to form the London Passenger Transport Board. Metropolitan Railway electric multiple units were refurbished in 1934 at Acton Works to become eighteen 5-car trains of Circle Stock, at first painted red and cream, later painted red all over to reduce costs. These trains included first-class accommodation,^[19] but this was downgraded in 1940.^[20] From 1947 these were replaced by 5-car trains of O and P Stock, with doors remotely operated by the guard, released by the transfer of F Stock to the Uxbridge line.^[21] The 1933 London Underground Beck map shows a Metropolitan line north of High Street Kensington and Mark Lane stations and a District line south of these points.^[22] On the 1947 map the Metropolitan and District lines were shown together in the same colour^[23] and two years later in 1949 the Circle line was shown separately on the map.^[24]

In 1959–1960 Circle line trains were increased to 6 cars, the same length as those operating on the Hammersmith & City line, and the stock of the two lines was integrated with maintenance concentrated at Hammersmith depot, allowing Neasden depot to concentrate on the new A Stock.^[25] Aluminium C Stock trains, with public address systems and originally unpainted, replaced these trains from 1970.^[26]One person operation of the trains was proposed in 1972 but, due to conflict with the trade unions, was not introduced until 1984.^[27] In 2003, the infrastructure of the Circle line was partly privatised in a public–private partnership, managed by the Metronet consortium. Metronet went into administration in 2007 and the local government body Transport for London took over responsibilities.^[28]

On 7 July 2005, at about 08:50, bombs exploded on two Circle line trains. One was travelling between Liverpool Street and Aldgate and the other was at Edgware Road. The bombs killed 15 people, including the two suicide bombers.^[29][30] Following the attacks, the whole of the Circle line was closed until 8 August.^[31]

A day before a ban on drinking alcohol on public transport in London came into force, a party was held on 31 May 2008, mainly on the Circle line. Thousands of people attended and 17 were arrested by police due to disorderly behaviour, eventually causing several stations to be closed.^[32]

Extension

Prior to 13 December 2009, Circle line trains travelled in both directions around a simple loop with 27 stations and 12.89 miles (20.75 km) of track. In 2006 there were fourteen trains in service on the line with an interval between trains of ​8 ¹⁄₂ minutes during peak hours and 8 minutes off-peak; the minimum running time around the circle off-peak was ​51 ¹⁄₂ minutes,^[33] although timetabled stops at stations extended this.^[b]

In December 2009 the Circle line was extended to include the Hammersmith & City route from Edgware Road to Hammersmith. Rather than continuously running around the circle, trains now travel from Hammersmith to Edgware Road, generally going around the circle once before terminating at Edgware Road, and returning via the same route; occasionally, trains may also continue clockwise through Edgware Road to additional stations. The change was made to improve reliability and increase the service frequency on the Hammersmith branch.^[35]

Route

Map

Railway line

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[ v t e ] Circle line
Legend
District line & Piccadilly line Hammersmith Hammersmith Goldhawk Road Hammersmith depot Shepherd's Bush (MR) District line & Piccadilly line Shepherd's Bush Market White City Wood Lane │ White City Central line West London Line Latimer Road Ladbroke Grove Westbourne Park District line Great Western main line High Street Kensington Royal Oak Gloucester Road Notting Hill Gate Bayswater South Kensington Paddington Praed Street Junction Sloane Square Edgware Road Victoria Metropolitan line Baker Street St. James's Park Great Portland Street Westminster Euston Square Thameslink Embankment King's Cross St. Pancras King's Cross Thameslink Temple City Widened Lines Farringdon Blackfriars City Thameslink Mansion House Cannon Street Barbican Monument Moorgate Tower Hill Liverpool Street Aldgate District line to Upminster H'smith & City line to Barking
Key
Circle line Metropolitan line Central line Piccadilly line District line London Overground Hammersmith & City line National Rail Joint sections: District line: Edgware Road – Tower Hill via Victoria Hammersmith & City line: Hammersmith – Liverpool Street Metropolitan line: Great Portland Street – Aldgate Source: Detailled London transport map (track, depot, ...)

The Circle line is 17 miles (27 km) long with 36 stations.^[36] Much of its track and all of its stations are shared with the other London Underground sub-surface lines: the Hammersmith & City line from Hammersmith to just before Aldgate; the Metropolitan line from Baker Street to Aldgate; and the District line from Tower Hill station to Edgware Road station.^[37] The line is electrified with a four-rail DC system: a central conductor rail is energised at 2997790000000000000♠−210 V and a rail outside the running rail at 7002420000000000000♠+420 V, giving a potential difference of 7002630000000000000♠630 V.^[38] The running rails are not electrified. Much of the 2-mile-35-chain (3.9 km) double track railway from the Hammersmith terminus to Westbourne Park station is on a 20-foot (6.1 m) high brick viaduct.^[39]

East of Westbourne Park the line passes beneath the Great Western main line before resurfacing at Royal Oak station and running alongside the tracks of the main line to an island platform just north of the suburban platforms at Paddington station.^[37] The line enters a cut and cover tunnel at the end of the platforms and meets the District line and the other end of the Circle line from Bayswater at Praed Street Junction before passing through Edgware Road station in a cutting. After King's Cross St Pancras station the line exits the tunnel before passing under the Ray Street Gridiron that carries the City Widened Lines which are currently used by Thameslink services.^[37][40] The line continues underground after Farringdon station; there are bay platforms at Moorgate station.^[37]

After passing through Aldgate station, the terminus of the Metropolitan line, the line joins the District line shortly before Tower Hill; this part of the line includes stations on the Victoria Embankment, on the north bank of the Thames, as far as Westminster station.^[37] West of Gloucester Road station the line turns off the District main line to join the District line's Edgware Road branch just before High Street Kensington station.^[37] In Bayswater the line is in a cutting, concealed from above by a façade of two five-storey houses at Nos. 23 and 24 Leinster Gardens.^[41] Trains then call at the second Paddington station on Praed Street before rejoining the Hammersmith & City line at Praed Street junction and terminating at the four-platform Edgware Road station.^[37]

Services

As of December 2012^[update] there are six trains per hour, calling at all stations,^[42] requiring 18 trains in service.^[36] The journey from Edgware Road around the loop and continuing to Hammersmith takes 72 minutes off-peak.^[42] Together with the Hammersmith & City line over 114 million passenger journeys are made each year.^[1] Paddington and all stations on the loop are within Zone 1, with those on the line to Hammersmith in Zone 2.^[43]

Two trains per day run from the District line station at Barking to Edgware Road via Victoria (as of February 2015).^[44]

Rolling stock

From 1970 to 2014, services were provided using six-car C69 stock trains, each car having mostly transverse seating and four sets of double doors per side to minimise loading times.^[45]

The C69 stock trains were replaced by seven-car S Stock trains, the first running on the Circle line on 2 September 2013.^[46][47][48] By June 2014 all services were provided by S7 Stock trains. The trains are part of Bombardier's Movia family,^[49] and have a top speed of 62 mph (100 km/h).^[49] A 7-car S Stock train has a capacity of 865 passengers compared to 739 for the 6-car C Stock train it replaced.^[50][51] With a length of 117 metres (384 ft), the S Stock trains are 24 metres (79 ft) longer than the 93-metre (305 ft) long C stock train, and required station platforms to be lengthened before their introduction.^[52]

Depot

The line's depot is at Hammersmith,^[c] close to Hammersmith station, originally built by the Great Western Railway to be operated by the Metropolitan Railway when the joint Hammersmith & City Railway was electrified in the early 20th century.^[53] Sidings at Barking, Farringdon and near High Street Kensington (known as Triangle Sidings) stable trains overnight.^[36]

Upgrade programme

Together with the introduction of 7-car S Stock trains, the sub-surface track, electrical supply and signalling systems are being upgraded in a programme planned to increase peak-hour capacity on the Circle and Hammersmith & City lines by 65 per cent by the end of 2018.^[54][55][56] AA single control room for the sub-surface network opened in Hammersmith on 6 May 2018, and an automatic train control (ATC) system will replace signalling equipment installed from the 1940s.^[55][57] The cross-London Crossrail line, planned to open in 2018, is expected to reduce crowding on Circle line services between Paddington and Aldgate.^[58][59]

List of stations

Station	Image	Opened[6]	Additional information	Position
Hammersmith		13 June 1864	Moved to current position 1 December 1868.[6]	51°29′39″N 000°13′30″W / 51.49417°N 0.22500°W / 51.49417; -0.22500 (01 - Hammersmith tube station)
Goldhawk Road		1 April 1914		51°30′07″N 000°13′37″W / 51.50194°N 0.22694°W / 51.50194; -0.22694 (02 - Goldhawk Road tube station)
Shepherd's Bush Market		13 June 1864	Moved to current position 1 April 1914.[6] Renamed from "Shepherd's Bush" in 2008.[60]	51°30′21″N 000°13′35″W / 51.50583°N 0.22639°W / 51.50583; -0.22639 (03 - Shepherd's Bush Market tube station)
Wood Lane		1 May 1908	Open as Wood Lane (Exhibition) 1908–14 and as required from 1920 as Wood Lane (White City). Renamed White City in 1947 and closed in 1959,[6] until re-opened as Wood Lane on 12 October 2008.[61]	51°30′35″N 000°13′27″W / 51.50972°N 0.22417°W / 51.50972; -0.22417 (04 - Wood Lane tube station)
Latimer Road		16 December 1868	Closed from 17 January to 1 August 2011 for engineering and refurbishment works.[62]	51°30′50″N 000°13′02″W / 51.51389°N 0.21722°W / 51.51389; -0.21722 (05 - Latimer Road tube station)
Ladbroke Grove		13 June 1864	Opened as Notting Hill, renamed Notting Hill & Ladbroke Grove in 1880, Ladbroke Grove (North Kensington) in 1919, and Ladbroke Grove in 1938.[6]	51°31′02″N 000°12′38″W / 51.51722°N 0.21056°W / 51.51722; -0.21056 (06 - Ladbroke Grove tube station)
Westbourne Park		1 February 1866	Moved to current position 1 November 1871,[6] and a Great Western main-line station from 1871 to 1992.[63]	51°31′16″N 000°12′04″W / 51.52111°N 0.20111°W / 51.52111; -0.20111 (07 - Westbourne Park tube station)
Royal Oak		30 October 1871	Also a Great Western main line station after opening.[64]until 1934	51°31′09″N 000°11′17″W / 51.51917°N 0.18806°W / 51.51917; -0.18806 (08 - Royal Oak tube station)
Paddington		10 January 1863	Opened as Paddington (Bishop's Road), renamed in 1948.[6] Connects with Bakerloo and District lines and Paddington main line station.	51°31′07″N 000°10′46″W / 51.51861°N 0.17944°W / 51.51861; -0.17944 (09 - Paddington station (Circle and Hammersmith & City lines))
Edgware Road		10 January 1863	Connects with District and the anti-clockwise Circle line.	51°31′12″N 000°10′04″W / 51.52000°N 0.16778°W / 51.52000; -0.16778 (10 - Edgware Road tube station)
Baker Street		10 January 1863	Connects with Bakerloo, Jubilee and Metropolitan lines.	51°31′19″N 000°09′25″W / 51.52194°N 0.15694°W / 51.52194; -0.15694 (11 - Baker Street tube station)
Great Portland Street		10 January 1863	Opened as Portland Road, renamed Great Portland Street in 1917. Named Great Portland Street & Regent's Park 1923–33.[6]	51°31′26″N 000°08′38″W / 51.52389°N 0.14389°W / 51.52389; -0.14389 (12 - Great Portland Street tube station)
Euston Square		10 January 1863	Opened as Gower Street and renamed in 1909.[6] Street connection with Euston main line station.	51°31′33″N 000°08′09″W / 51.52583°N 0.13583°W / 51.52583; -0.13583 (13 - Euston Square tube station)
King's Cross St Pancras		10 January 1863	Opened as King's Cross, renamed King's Cross & St. Pancras in 1925 and King's Cross St. Pancras in 1933. Moved to current position in 1941.[6] Connects with Northern, Piccadilly and Victoria lines and St Pancras and King's Cross main line stations.	51°31′49″N 000°07′27″W / 51.53028°N 0.12417°W / 51.53028; -0.12417 (14 - King's Cross St. Pancras tube station)
Farringdon		10 January 1863	Opened as Farringdon Street, and moved to current position in 1865. Renamed Farringdon & High Holborn in 1922 and Farringdon in 1936.[6] Connects with Thameslink services.	51°31′12″N 000°06′19″W / 51.52000°N 0.10528°W / 51.52000; -0.10528 (15 - Farringdon station)
Barbican		23 December 1865	Opened as Aldersgate Street, then Aldersgate in 1910, Aldersgate & Barbican in 1923 and Barbican in 1968.[6]	51°31′13″N 000°05′52″W / 51.52028°N 0.09778°W / 51.52028; -0.09778 (16 - Barbican tube station)
Moorgate		23 December 1865	Opened as Moorgate Street, renamed in 1924.[6] Connects with Northern line and the main line Northern City Line	51°31′07″N 000°05′19″W / 51.51861°N 0.08861°W / 51.51861; -0.08861 (17 - Moorgate station)
Liverpool Street		11 July 1875	From February to July 1875 trains used platforms in the mainline station.[65] Connects with Central and Hammersmith & City lines and Liverpool Street mainline station.	51°31′04″N 000°04′59″W / 51.51778°N 0.08306°W / 51.51778; -0.08306 (18 - Liverpool Street station)
Aldgate		18 November 1876		51°30′50″N 000°04′34″W / 51.51389°N 0.07611°W / 51.51389; -0.07611 (19 - Aldgate tube station)
Tower Hill		25 September 1882	The Metropolitan Railway opened "Tower of London", however closed this in 1884 as the District Railway had opened "Mark Lane" nearby. This station was renamed "Tower Hill" in 1946 and moved to the site of the "Tower of London" station in 1967.[6][66] Connects with District line.	51°30′36″N 000°04′34″W / 51.51000°N 0.07611°W / 51.51000; -0.07611 (20 - Tower Hill tube station)
Monument		6 October 1884	Opened as Eastcheap, renamed The Monument in 1884.[6] Escalator connection to Bank station giving connections with Central, Northern, Waterloo & City and DLR.	51°30′47″N 000°05′17″W / 51.51306°N 0.08806°W / 51.51306; -0.08806 (21 - Bank–Monument station)
Cannon Street		6 October 1884	Connects with Cannon Street main line station.	51°30′37″N 000°05′27″W / 51.51028°N 0.09083°W / 51.51028; -0.09083 (22 - Cannon Street station)
Mansion House		3 July 1871		51°30′44″N 000°05′39″W / 51.51222°N 0.09417°W / 51.51222; -0.09417 (23 - Mansion House tube station)
Blackfriars		30 May 1870	Connects with Blackfriars main line station, including Thameslink services.	51°30′42″N 000°06′11″W / 51.51167°N 0.10306°W / 51.51167; -0.10306 (24 - Blackfriars station)
Temple		30 May 1870	Opened as The Temple.[6]	51°30′40″N 000°06′52″W / 51.51111°N 0.11444°W / 51.51111; -0.11444 (25 - Temple tube station)
Embankment		30 May 1870	Opened as Charing Cross, renamed Charing Cross Embankment in 1974 and to the current name from 1976.[6] Connects with Bakerloo and Northern lines and Charing Cross main line station	51°30′25″N 000°07′19″W / 51.50694°N 0.12194°W / 51.50694; -0.12194 (26 - Embankment tube station)
Westminster		24 December 1868	Opened as Westminster Bridge, renamed in 1907.[6] Connects with Jubilee line	51°30′04″N 000°07′30″W / 51.50111°N 0.12500°W / 51.50111; -0.12500 (27 - Westminster tube station)
St James's Park		24 December 1868		51°29′58″N 000°08′04″W / 51.49944°N 0.13444°W / 51.49944; -0.13444 (28 - St. James's Park tube station)
Victoria		24 December 1868	Connects with Victoria line and Victoria main line station.	51°29′48″N 000°08′41″W / 51.49667°N 0.14472°W / 51.49667; -0.14472 (29 - London Victoria station)
Sloane Square		24 December 1868		51°29′33″N 000°09′24″W / 51.49250°N 0.15667°W / 51.49250; -0.15667 (30 - Sloane Square tube station)
South Kensington		24 December 1868	Connects with Piccadilly line	51°29′39″N 000°10′26″W / 51.49417°N 0.17389°W / 51.49417; -0.17389 (31 - South Kensington tube station)
Gloucester Road		1 October 1868	Opened as Brompton (Gloucester Road), renamed in 1907.[6] Connects with Piccadilly and District lines.	51°29′41″N 000°10′59″W / 51.49472°N 0.18306°W / 51.49472; -0.18306 (32 - Gloucester Road tube station)
High Street Kensington		1 October 1868	Opened as Kensington (High Street) and name gradually changed by 1880.[6] Connects with District line Edgware Road branch.	51°30′03″N 000°11′33″W / 51.50083°N 0.19250°W / 51.50083; -0.19250 (33 - High Street Kensington tube station)
Notting Hill Gate		1 October 1868	Connects with Central line.	51°30′32″N 000°11′49″W / 51.50889°N 0.19694°W / 51.50889; -0.19694 (34 - Notting Hill Gate tube station)
Bayswater		1 October 1868	Opened as Bayswater, renamed Bayswater (Queen's Road) & Westbourne Grove in 1923, Bayswater (Queen's Road) in 1933 and Bayswater (Queensway) in 1946, after which the suffix was gradually dropped.[6]	51°30′43″N 000°11′17″W / 51.51194°N 0.18806°W / 51.51194; -0.18806 (35 - Bayswater tube station)
Paddington		1 October 1868	Opened as Paddington (Praed Street), renamed in 1948.[6] Connects with Bakerloo and Hammersmith & City lines and Paddington main line station.	51°30′56″N 000°10′32″W / 51.51556°N 0.17556°W / 51.51556; -0.17556 (36 - Paddington station (District line platforms))

The line then continues to Edgware Road where trains terminate, then reverse to traverse the loop in an anticlockwise direction to Hammersmith.

Urban Myths

Owing to its traditionally circular nature, the line has generated many urban myths over the years, including a dead man travelling around undiscovered, a school or office using the service to save infrastructure costs and, as an April fool in the Independent, a new particle accelerator to coexist alongside passenger services. ^[9][67][68]

See also

• Cromwell Curve

Notes and references

Notes

References

Bibliography

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Further reading

• 
  Croome, Desmond F. (1 February 2003). Circle Line. Capital Transport. ISBN 978-1-85414-267-2.
  


• 
  London Railway Map. Quail Maps. 2001. ISBN 978-1898319-54-2.
  


• 
  Yonge, John (November 2008) [1994]. Jacobs, Gerald, ed. 5: Southern & TfL. Railway Track Diagrams (3rd ed.). Bradford on Avon: Trackmaps. ISBN 978-0-9549866-4-3.
  

External links

Wikimedia Commons has media related to Circle Line.

Route map:

KML file (edit • help)

• 
  Circle Line Clive's UndergrounD Line Guides


• 
  Circle line on Twitter