Tube trivia and facts

Tube engineer at Ealing Common Depot

The Tube has been at the heart of London’s history for over 150 years. But do you know which is the deepest station? πŸ€“ Or the shortest journey? 😏

Find key facts and interesting figures here.

Date opened 🐣1863
Annual passenger numbers1.35 billion
Length of network402km
Busiest stationWaterloo – 100.3 million passengers per year
Annual train km travelled83.6 million km
Average train speed33kph
Proportion of network in tunnels πŸš‡45%
Longest continuous tunnelEast Finchley to Morden (via Bank) – 27.8km
Station with most escalatorsWaterloo – 23
Longest escalatorAngel – 60 metres
Shortest escalatorStratford – 4.1 metres
Total number of passenger lifts ☝️202
Total number of escalators πŸ‘‡451
Number of moving walkwaysFour, two each at Waterloo and Bank
Deepest lift shaftHampstead – 55.2 metres
Shortest lift shaftKing’s Cross St. Pancras – 2.3 metres
Station with most platformsBaker Street – 10
Highest station above mean sea level 🌊Amersham (Metropolitan line) – 147 metres
Furthest distance between stationsChesham to Chalfont & Latimer (Metropolitan line) – 6.3km
Shortest distance between stationsLeicester Square to Covent Garden (Piccadilly line) – 0.3km
Furthest station from central LondonChesham
Longest direct journeyEpping to West Ruislip (Central line) – 54.9km

Stations πŸš‰

We categorise our stations in one these four types.

Local Tube station type drawing


These smaller stations, in outer London or beyond, have lower customer numbers and serve mainly regular customers, familiar with the Tube network. An example of a local station would be Rickmansworth.

Metro Tube station type drawing


These stations serve predominantly inner London communities with many regular users. An example of a metro station would be Clapham South.

Gateway Tube station type drawing


These stations are the main visitor entry points to London, with high volumes of customers and a high proportion of people unfamiliar with the Tube network. At these stations, new Visitor Information Centres will be in place. An example of a Gateway station would be King’s Cross St. Pancras or Heathrow 1,2,3.

Destination Tube station type drawing


These busy stations in Central London have high volumes of customers and include commuter rail termini and tourist destinations. An example of a destination station would be Embankment.

Rolling stock (trains) πŸš‡

We use a variety of rolling stock because Tube lines have different platform lengths, signalling systems and tunnel sizes.

Most units of rolling stock last around 40 years. Major refurbishment can prolong life by another 10-15 years and is much cheaper than buying a new train.

Trains currently in service include:

‘S’ stock

  • S8 runs on the Metropolitan line
  • S7 runs on the Circle, Hammersmith & City, and District lines
  • The first walk-through gangway train on the Tube – the inside of the train is one continuous length, providing improved capacity, security and passenger flow
  • Fully air conditioned
  • S7 has 7 carriages, 256 seats per train
  • S8 has 8 carriages, 306 seats per train

2009 stock

  • Runs on the Victoria line
  • Introduced in 2011
  • Doors electronically detect objects and prevent the doors closing
  • Faster journey times thanks to automatic train protection and operation
  • 324 seats per train
  • Total passenger capacity per train – 864

1996 stock

  • Runs on the Jubilee line
  • Introduced in 1996 as part of the Jubilee line extension project
  • 234 seats per train
  • Total passenger capacity per train – 817

1995 stock

  • Runs on the Northern line
  • Introduced in 1995
  • Usually operated by one person, so their introduction saw the withdrawal of guards on the Northern line
  • 268 seats per train
  • Total passenger capacity per train – 665

1992 stock

  • Runs on the Central and Waterloo & City lines
  • Introduced in 1992
  • The twin sliding doors, plus one single door at each end of each car, are wider than any used previously on the Tube
  • 272 seats per train
  • Total passenger capacity per train – 892

1973 stock

Runs on the Piccadilly line

  • Introduced in 1975
  • Built to cater for airline passengers travelling with luggage between central London and Heathrow. Extra floor space provided by longer carriages and larger vestibules than its predecessor
  • 272 seats per train
  • Total passenger capacity per train – 684

1972 stock

  • Runs on the Bakerloo line
  • Introduced in 1972
  • 264 seats per train
  • Total passenger capacity per train – 730

History and heritage πŸ‘©β€πŸ«

London Underground’s history dates back to 1863 when the world’s first underground railway, the Metropolitan Railway, opened between Paddington and Farringdon serving six intermediate stations.

Since then the Underground network, affectionately nicknamed the Tube by generations of Londoners, has grown to 270 stations and 11 lines stretching deep into the Capital’s suburbs, and beyond.

The development of London into the preeminent world city during the 19th, 20th and 21st centuries would not have been possible without the mobility provided by the Underground.

Digging down πŸ‘·β€β™€οΈ

Much of the central London network was completed in the first 50 years, all through private development. In this period the first group of routes were built in shallow cut-and-cover tunnels along existing thoroughfares and needed plenty of vents to allow smoke and steam from the engines to escape. Then around the turn of the twentieth century, the development of electric traction allowed much deeper tunnels to penetrate the heart of the city, leading to the second wave of construction.

In the next 50 years, the focus turned to extending lines ever further into London’s suburbs. Indeed, many suburbs were created by the coming of the Underground, and were even developed by the railway companies themselves, becoming known famously as Metroland. In 1933, the various private companies running different lines were nationalised and integrated into a single body, the London Passenger Transport Board.

New lines πŸ‘Œ

It wasn’t until 1968 that the first new line across central London for more than 60 years – the Victoria line – opened, followed in 1979 by the Jubilee line. In 1999 the Jubilee line was then extended to London’s Docklands, facilitating regeneration and the growth of the Canary Wharf business district.

In 2003, London Underground became a wholly owned subsidiary of TfL. Our comprehensive plan to improve the Tube has involved refurbishing hundreds of stations, upgrading lines to provide faster, more frequent and more reliable services, installing step-free access at many locations, and also entirely rebuilding some central London stations that have become too small to deal with the number of people passing through every day.

The extra capacity these improvements are providing is needed. In 2016/17 1.37 billion journeys were made, over two and a half times the post-war low of 498 million journeys made in 1982.

Tube map vintage and modern 😍

January 2021 Tube mapVintage Tube map

Tube lines and their history

πŸ‘‰ Bakerloo line

Rumour has it that the Bakerloo line was created after a group of businessmen complained that they couldn’t get to and from Lord’s Cricket Ground quickly enough. The instant success of the line, however, proved that they weren’t the only ones in need of the service. When it opened on 10 March 1906, more than 36,000 passengers used it, despite the fact that the cricket season had yet to start.

Key Bakerloo line dates

  • 1906 – Elephant & Castle station opens
  • 1915 – The line is extended from Baker Street to Queen’s Park
  • 1939 – The Bakerloo line takes over the Stanmore branch of the Metropolitan line
  • 1979 – The Jubilee line opens and, after 40 years, the Stanmore branch of the Bakerloo line closes
  • 1982 – The four peak period trains between Queen’s Park and Watford Junction are withdrawn
  • 1989 – Services between Queen’s Park and Harrow & Wealdstone restart

πŸ‘‰ Central line

The Central Line, originally called the Central London Railway, opened on 30 July 1900 as a cross-London route from Bank to Shepherd’s Bush.

Popular from the start, part of its success stemmed from the cost: a flat fare of two old pence to travel. This inspired the press to call it the ‘Tuppenny Tube.’

In 1908, London hosted the Franco-British exhibition, the largest fair of its kind, which attracted 8 million visitors. At the time, the exhibition site was little more than a cluster of white buildings with no official name but when the Central line extended to the site, it officially became known as White City.

Then in the 1990s, the Central line was upgraded to automatic operation, making it the second Underground line, after the Victoria line in the 1960s, to use this technology.

Key Central line dates

  • 1900 – Central London Railway opens
  • 1908 – The line then extends west to Wood Lane to support the White City Exhibition
  • 1912 – The line extends east from Bank to Liverpool Street
  • 1920 – The line extends west to Ealing Broadway
  • 1945 – After the war, new tracks next to to the main line railway start to be used. They run from North Acton to West Ruislip and include new tunnels from Liverpool Street to Leyton
  • 1994 – The Epping to Ongar shuttle service closes, due to low passenger numbers

πŸ‘‰ Circle line

Although the first circular service started in 1884, the Circle line as we know it didn’t really begin until the 1930s. The ‘Circle line’ name first appeared on a poster in 1936 but took another 13 years for it to get its own, separate line on the Tube map.

The tracks used by the Circle line were run by the Metropolitan Railway and District Railway, two companies who couldn’t agree on how to run the line. Their differences initially meant that District Railway ran the clockwise trains and Metropolitan Railway, the anti-clockwise trains.

Then in December 2009, the Circle line was broken and replaced by an end-to-end service between Hammersmith and Edgware Road, via Aldgate.

Key Circle line dates

  • 1884 – The first circular service begins
  • 1868 – The Paddington to Farringdon (Metropolitan Railway) line then extends to South Kensington. The District Railway opens its new line from South Kensington to Westminster at the same time
  • 1884 – The District Railway line finally extends to Mark Lane (now Tower Hill). It meets the Metropolitan Railway line to create a full circle
  • 1905 – The line is electrified
  • 1933 – Metropolitan Railway and District Railway become part of the London Passenger Transport Board
  • 1936 – The ‘Circle line’ name appears on a poster for the first time
  • 1949 – The Circle line gets its own line on the Tube map
  • 2009 – The Circle line is broken and replaced by and end-to-end service

πŸ‘‰ District line

The District line first opened on Christmas Eve 1868, between South Kensington and Westminster. In the years following, it extended both east and west, even going as far as Windsor.

In 1883, the line was extended from Ealing Broadway to Windsor and has run services as far as Southend, during its time. Uxbridge and Hounslow were part of the District line until they were transferred to the Piccadilly line in 1933 and 1964.

Key District line dates

  • 1868 – The first section of what is now the District line begins. It runs between South Kensington and Westminster
  • 1869 – New tracks open between Gloucester Road and West Brompton
  • 1874 – The line then extends to Hammersmith, Richmond in 1877 and Ealing Broadway in 1879
  • 1885 – The two-year old Ealing to Windsor service ends
  • 1884 – The line extends to Mark Lane (now Tower Hill)
  • 1910 – The line extends to Uxbridge, following an earlier extension to Hounslow (in 1884)

πŸ‘‰ Hammersmith & City line

Intended as a feeder to the Metropolitan line, with the extension running through fields on the fringes of suburbia to Hammersmith, The Hammersmith and City Railway opened on 13 June 1864. It wasn’t until 1988, however, that it gained independence to become the Hammersmith & City line in its own right.

Jointly run by the Great Western Railway (GWR) and Metropolitan Railway (MR), when it opened, the only stations on the two-mile long track were Notting Hill (now Ladbroke Grove) and Shepherd’s Bush.

Since the Circle line began running trains on the ‘loop’ in 2009, the Hammersmith & City line no longer has any unique stations. Every one of its 29 stations is shared with another Tube line.

Key Hammersmith & City line dates

  • 1863 – The Metropolitan Railway opens between Farringdon and Paddington
  • 1864 – Together with Great Western Railways, Metropolitan Railway extends the line to Hammersmith
  • 1864 – Services to Addison Road (now Kensington Olympia), via the curve at Latimer Road, begin. Following bomb damage in 1940, this service is suspended and doesn’t restart after the war
  • 1869 – A new London and South Western line opens between north of Addison Road and Richmond, via Ravenscourt Park. The new Hammersmith station (at Grove Road) means the old terminus is re-sited
  • 1884 – The line then extends east to Whitechapel
  • 1906 – The line is electrified
  • 1936 – Trains are extended over the former District Railway line to Barking
  • 1988 – The line becomes the Hammersmith & City line in its own right

πŸ‘‰ Jubilee line

Although a number of Jubilee line stations are among the Underground’s newest, the line also serves some stations that originally opened over 100 years ago.

Inaugurated on 1 May 1979, the Jubilee line linked new tunnels across central London (stretching for 4 kilometres between Baker Street and Charing Cross with the former Bakerloo line branch north of Baker Street to Stanmore).

The northern end of the line had previously been part of the Metropolitan Railway, before transferring to the Bakerloo line in 1939 when a new section of twin tube tunnels between Baker Street and Finchley Road (including stations at St John’s Wood and Swiss Cottage) also opened.

From 1979 Charing Cross was the line’s southern terminus for two decades, but further extension to the Jubilee line was recommended in the East London Rail Study in 1989 with Royal Assent to the Bill obtained in March 1992.

Work started on the Β£3.5bn project to extend the Jubilee line in 1993. The Prime Minister at the time, John Major drove the first pile of the extension at a start-of-work ceremony at Canary Wharf on 8 December 1993. The extension from Green Park to Stratford was opened in three phases during 1999. The extended Jubilee line was finally joined to the existing line on 20 November 1999, although Westminster was the last station on the line to be opened on 22 December 1999.

Since its opening, the Jubilee line extension has facilitated and contributed to the significant growth of London’s Docklands as a centre for business, residential and leisure activity.

πŸ‘‰ Metropolitan line

Opened in 1863, The Metropolitan Railway between Paddington and Farringdon was the first, urban, underground railway in the world.

An extension from Baker Street to Swiss Cottage in 1868, however, put an end to this claim to fame. With the growth of suburban areas in the north west of London, Buckinghamshire, Hertfordshire and Middlesex (dubbed ‘Metroland’), in the 20th century, Metropolitan Railway spotted a marketing opportunity: by promoting dream homes in the countryside, they could also highlight their own fast, rail services to get people there.

As the owners of surplus land, Metropolitan Railway were in a position to branch out into real estate, and by 1919 they were developing housing under the name of Metropolitan Railway Country Estates Limited.

Metroland was immortalised in the 1973 BBC TV documentary, narrated by the then Poet Laureate, Sir John Betjeman.

Key Metropolitan line dates

  • 1863 – The line opens between Paddington and Farringdon
  • 1868 – The line then extends from Baker Street to Swiss Cottage
  • 1892 – Line extensions reaches Aylesbury
  • 1904 – The Uxbridge branch opens
  • 1905 – The first electric trains appear and are gradually introduced across the whole line, apart from the line beyond Rickmansworth
  • 1925 – The Watford branch opens
  • 1932 – Another branch, to Stanmore opens, but this becomes part of the Bakerloo line in 1939
  • 1961 – The steam trains operating north of Rickmansworth stop as the line is electrified to Amersham and Chesham. Services beyond Amersham are taken over by British Rail (now Chiltern Railways)
  • 2012 – A new fleet of electric trains are then introduced, the first on the Underground to feature air conditioning and full-length, walk-through interiors

πŸ‘‰ Northern line

The Northern line, opened in 1937, was created out of two separate railways: the City and South London Railway, and the Charing Cross, Euston and Hampstead Railway.

It expanded a little but WWII slowed the expansions down. Scheduled plans to extend to Mill Hill, Brockley Hill, Elstree and Bushey Heath (known as the Northern Heights plan), suffered post-war restrictions and never recovered. These plans were finally dismissed in 1954.

Key Northern line dates

  • 1890 – City & South London Railway opens – it runs from King William Street (near Bank) to Stockwell
  • 1907 – Charing Cross, Euston and Hampstead Railway (Hampstead Railway, as it’s called) opens. It runs from the Strand (Charing Cross) to Golders Green, with a branch from Camden Town to Highgate
  • 1921 – Hampstead Railway extends to Edgware
  • 1922 – City and South London Railway links to the Hampstead Railway at Camden Town
  • 1926 – City and South London/Hampstead Railway then extends south to Morden and Kennington
  • 1933 – City and South London/Hampstead Railway become the Northern line
  • 1939 – 1941 The new Northern line extends between Archway and East Finchley, High Barnet and Mill Hill East
  • 1975 – The tunnelled link between Finsbury Park and Moorgate, via Essex Road, is transferred to British Rail (now First Capital Connect)

πŸ‘‰ Piccadilly line

The Piccadilly line opened as the Great Northern, Piccadilly & Brompton Railway on 15 December 1906 and it ran between Finsbury Park and Hammersmith.

The line remained much the same until the 1930s when it expanded rapidly, incorporating stations which are now regarded as classic examples of period architecture. Arnos Grove, Southgate and Sudbury Town, for example, are listed buildings.

The development of Heathrow Airport has also been a reason for expansion, with Heathrow Terminals 1-5 opening between 1977 and 2008. When Terminal 5 opened in 2008, it became the first stretch of new Underground railway in London since the Jubilee line extension in 1999.

Key Piccadilly line dates

  • 1906 – The line opens between Finsbury Park and Hammersmith
  • 1907 – A branch line from Holborn to Aldwych opens
  • 1932 to 1933 – The line extends to South Harrow, Arnos Grove, Hounslow West, Uxbridge and Cockfosters
  • 1977 – Heathrow Terminals 1, 2 and 3 open
  • 1986 – The Heathrow service becomes a loop with the opening of Terminal 4
  • 1994 – The Aldwych branch of the Piccadilly line closes down because of too few passengers and high costs
  • 2008 – Heathrow Terminal 5 opens

πŸ‘‰ Victoria line

Built at the end of the 1960s, the main aim of the Victoria line was to connect four, main line terminals: Euston, St. Pancras, King’s Cross and Victoria, although its origins go back to 1943.

Future hopes for the Victoria line were included in a document called the County of London Plan, but war and post-war constraints mean that the plans continued to be put on hold.

Parliamentary Powers to build the line were obtained in 1955 but difficulties with funding meant that actual construction work didn’t start until 1962.

The Victoria line opened in stages between 1968 and 1971, and reached areas of north and south London that had never had an Underground station before.

The line was the first automatic passenger railway in the world, fully equipped with an Automatic Train Operation system (ATO). Such technology meant that at the touch of a button, the train doors would close and drive automatically to the next station, guided by coded impulses transmitted through the track.

The original 1968 line then received a complete upgrade in 2012.

πŸ‘‰ Waterloo & City line

In 1898, the Waterloo & City line (or ‘Drain’ as it was known), became London’s second, deep-level Tube railway.

Initially, it was promoted by the London and South Western Railway company, whose trains terminated at Waterloo. The new line’s selling point was that it could offer commuters a direct rail link to and from the City of London.

Wooden-built trains ran on the line until 1940 but were replaced by specially-designed, Tube-sized cars based on the technology of the Southern Railway’s trains, but these too were eventually replaced in 1994.

In the post-war years, the Waterloo & City line became part of British Railways but it transferred to London Underground in 1994, when it became (at that time), the Underground’s 12th line.

Tell us your favourite Tube trivia

Do you know more interesting facts, figures and tidbits? Share in the comments below! πŸ‘‡


  1. Highgate station on the Northern Line has the longest platforms on the tube (I think) because they were expecting longer trains at the time

  2. Greenford station on the Central line was the last station to have wooden-tread escalators, with them being eventually replaced by an incline lift in 2015 – which also made the station step-free!

  3. Station with most platforms – Bank/Monument Complex also has ten platforms :-
    District & Circle Lines Platforms 1 & 2
    Northern Line – Platforms 3 & 4
    Central Lines – Platforms 5 & 6
    Waterloo & City Lines – Platforms 7 & 8
    Docklands Light Railway – Platforms 9 & 10

  4. There is only one station on the Underground whose name contains no letter from the word β€˜mackerel β€˜.

    Part of this name is an abbreviation; if written in full even this station fails the mackerel test!

    Which station?

      1. Cannot be St. John’s Wood because, if written in full, “Saint John’s Wood” fails the”mackerel” test
        (But it was my first guess).

    1. There is only one station on the Underground whose name contains no letter from the word ‘amoeba’. There is no abbreviated version of the one-word station name so it passes every time.

    2. St Johns Wood is the correct answer. It does not have any letters from the word: mackerel.

    3. st john’s wood. But if you spell out the abbreviation – Saint – then it fails the test?

  5. Whitechapel is the only station where its Overground platforms are underground and its Underground platforms are overground.

  6. On the Piccadilly Line you can travel from Cockfosters to Arnos Grove all above ground (it only goes under Southgate) and this stretch has some interesting buildings as stations, Southgate is known as Southgate Circus as it is round. My Mum once took my youngest onto the platform at Cockfosters to show him the trains, as the doors started closing he jumped on so my Mum had to get on with him…(honest) … they got off at Arnos Grove and came back to Cockfosters. That stretch passes over both Arnos and Oakwood parks, so he was able to wave to the children in the parks. The Station Master kindly did not charge them other than for a platform ticket. Thanks London Transport (now Transport for London) (this was in 1994)

    1. South Ealing contains all five vowels only once.

      Mansion House also contains all five vowels, but some are repeated.

      Heathrow Terminal 4 may or may not contain all five vowels, depending on whether you count the word “four” as being part of its name.

  7. Including the DLR, shortest distance between stations is the Canary Wharf – West India Quay, approx 200m.

  8. 1938 ex London Underground trains just now being replaced after serving on the Isle of Wight. Any estimation of the annual mileage of an underground train?

  9. Can someone please tell me what is handwritten in the picture of the oldmap, near Pimlico station? In the G-9 square. Thanks

    1. Looks like β€œand elsewhere” pointing to Victoria. Not sure what the doodle is, maybe the front of a coach? Probably not.

  10. Platform lengths are an interesting bit of trivia. Shortest and longest per line, including Overground.

  11. Total sq. miles served by the London Underground system is approx 814 sq miles.
    Taking the NW corner as Chesham and a rectangle 37 miles east to Upminster and south 22 miles to Morden

  12. On the dlr bow church has long platforms
    On the Northern Line, at Clapham Common there is short platforms

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