Editing Northern line (section)

== Recent developments ==
Throughout the 2000s, no plans were considered for extending the Northern line, as the PPP to upgrade the Underground did not include provision for line extensions within the PPP contracts.<ref>{{cite web |title=Details of Tube modernisation plans unveiled |url=http://www.tubelines.com/news/releases/200602/20030108.aspx |website=Tube Lines |date=8 January 2003 |access-date=8 March 2021 |archive-url=https://web.archive.org/web/20060519094016/http://www.tubelines.com/news/releases/200602/20030108.aspx |archive-date=19 May 2006}}</ref><ref>{{cite web |last1=Shawcross |first1=Valerie |author1-link=Val Shawcross |last2=Livingstone |first2=Ken |author2-link=Ken Livingstone |title=Transport Plan – Southward Extensions |url=https://www.london.gov.uk/questions/2005/0820 |url-status=live |date=7 March 2005 |access-date=29 March 2021 |website=Mayor's Question Time |archive-url=https://web.archive.org/web/20210909142647/https://www.london.gov.uk/questions/2005/0820 |archive-date=9 September 2021}}</ref> The Northern line was originally scheduled to switch to [[automatic train operation]] in 2012, using the same [[SelTrac]] S40 system<ref name=thereg-20160809>{{cite news |last=Corfield |first=Gareth |title=London's 'automatic' Tube trains suffered 750 computer failures last year |url=https://www.theregister.co.uk/2016/08/09/london_underground_trains_stopped_750_times_automatic_train_operation_failure/ |url-status=live |newspaper=The Register |date=9 August 2016 |access-date=9 August 2016 |archive-url=https://web.archive.org/web/20160809093739/http://www.theregister.co.uk/2016/08/09/london_underground_trains_stopped_750_times_automatic_train_operation_failure/ |archive-date=9 August 2016}}</ref> as used since 2009 on the [[Jubilee line]] and for a number of years on the [[Docklands Light Railway]].<ref name="Tube Lines">{{cite press release |title=Network Tests for New Signalling Systems |url=http://www.tubelines.com/news/releases/200602/20050824.aspx |publisher=[[Tube Lines]] |date=24 August 2005 |archive-url=https://web.archive.org/web/20080105201220/http://www.tubelines.com/news/releases/200602/20050824.aspx |archive-date=5 January 2008}}</ref> Originally the work was to follow on from the Jubilee line so as to benefit from the experience of installing it there, but that project was not completed until spring 2011. Work on the Northern line was contracted to be completed before the [[2012 Summer Olympics|2012 Olympics]]. It was then undertaken in-house, and TfL predicted the upgrade would be complete by the end of 2014.<ref>{{cite web |url=http://www.tfl.gov.uk/assets/downloads/corporate/Part-1-Item06-Operational-Financial-Peformance-and-Investment-Programme-Reports-Q3-2012-13.pdf |publisher=Transport for London |date=6 February 2013 |title=Operational and Financial Performance Report and Investment Programme Report – Third Quarter, 2012/13 |access-date=1 March 2013 |archive-date=30 April 2013 |archive-url=https://web.archive.org/web/20130430154333/http://www.tfl.gov.uk/assets/downloads/corporate/Part-1-Item06-Operational-Financial-Peformance-and-Investment-Programme-Reports-Q3-2012-13.pdf |url-status=live}}</ref> The first section of the line (West Finchley to High Barnet) was transferred to the new signalling system on 26 February 2013<ref>{{cite press release |url=http://www.tfl.gov.uk/corporate/media/newscentre/archive/27303.aspx |publisher=Transport for London |date=26 February 2013 |title=Northern line upgrade one step closer}}</ref> and the line became fully automated on 1 June 2014, with the Chalk Farm to Edgware via Golders Green section being the last part of the line to switch to ATO.<ref>{{cite web|url=https://www.london.gov.uk/moderngov/documents/s40260/Transport%20Commitments%20Appendix%201.pdf |archive-url=https://web.archive.org/web/20210511105907/https://www.london.gov.uk/moderngov/documents/s40260/Transport%20Commitments%20Appendix%201.pdf |archive-date=2021-05-11 |url-status=live|title=Mayor of London – Transport Commitments}}</ref><ref>{{cite web|url=https://www.railengineer.co.uk/2015/05/08/lu-northern-line-goes-cbtc/|title=LU Northern line goes CBTC|last=Kessell|first=Clive|access-date=5 October 2019}}{{dead link|date=April 2023 |bot=InternetArchiveBot |fix-attempted=yes}}</ref>

In January 2018, Transport for London announced that it would double the period during which it runs peak evening services in the central London section to tackle overcrowding. There would now be 24 trains per hour on both central London branches and the northern branches, as well as 30 trains per hour on the Kennington to Morden section between 5{{nbsp}}pm and 7{{nbsp}}pm.<ref name="cityam">{{cite news |url=http://www.cityam.com/279628/northern-line-passengers-get-quicker-and-more-frequent |title=Northern Line passengers to get quicker and more frequent journeys as TfL boosts services to tackle crowding on busiest Tube line |newspaper=[[City A.M.]] |location=London |date=29 January 2018 |access-date=29 January 2018 |first=Rebecca |last=Smith |url-status=dead |archive-url=https://web.archive.org/web/20180130064220/http://www.cityam.com/279628/northern-line-passengers-get-quicker-and-more-frequent |archive-date=30 January 2018}}</ref>

===24-hour weekend service===
Since the mid-autumn of 2016,<ref name=":3">{{cite web |url=https://tfl.gov.uk/campaign/tube-improvements/what-we-are-doing/night-tube |title=The Night Tube |publisher=Transport for London |access-date=28 September 2016 |archive-date=21 August 2020 |archive-url=https://web.archive.org/web/20200821161701/https://tfl.gov.uk/campaign/tube-improvements/what-we-are-doing/night-tube |url-status=live}}</ref> a 24-hour "[[Night Tube]]" service has run on Friday and Saturday nights from Edgware and High Barnet to Morden via the Charing Cross branch; service is suspended on the Bank branch during these times.<ref>{{cite web |url=https://tfl.gov.uk/campaign/tube-improvements/the-future-of-the-tube/night-tube |title=The Night Tube |date=n.d. |publisher=Transport for London |access-date=24 October 2015 |archive-date=11 July 2015 |archive-url=https://web.archive.org/web/20150711150816/https://tfl.gov.uk/campaign/tube-improvements/the-future-of-the-tube/night-tube |url-status=live}}</ref> Trains run every eight minutes between Morden and Camden Town and every 15/16 minutes between Camden Town and Edgware/High Barnet. Labour disputes delayed the planned start date of September 2015.<ref>{{cite news |url=https://www.theguardian.com/uk-news/2015/aug/27/london-night-tube-plan-suspended |title=London night tube plan suspended |first=Gwyn |last=Topham |work=The Guardian |location=London |date=27 August 2015 |access-date=15 December 2016 |archive-date=1 January 2017 |archive-url=https://web.archive.org/web/20170101093815/https://www.theguardian.com/uk-news/2015/aug/27/london-night-tube-plan-suspended |url-status=live}}</ref>

===Battersea extension===
{{main|Northern line extension to Battersea}}
In September 2021, the Northern line was extended to serve the redevelopment of [[Battersea Power Station]]. Partially funded by private developers, the £1.2bn project extended the Charing Cross branch of the line for {{convert|3.2|km|mi|abbr=in}} from [[Kennington tube station|Kennington]] to Battersea Power Station,<ref name=":0">{{cite news|last=Collier|first=Hatty|date=8 November 2017|title=Tunnelling work to extend Tube's Northern Line to Battersea completed|work=Evening Standard|location=London|url=https://www.standard.co.uk/news/transport/northern-line-extension-tunnelling-work-on-12bn-extension-to-battersea-completed-ahead-of-2020-a3685746.html|access-date=22 January 2018|archive-date=9 November 2020|archive-url=https://web.archive.org/web/20201109041335/https://www.standard.co.uk/news/transport/northern-line-extension-tunnelling-work-on-12bn-extension-to-battersea-completed-ahead-of-2020-a3685746.html|url-status=live}}</ref> with an intermediate stop at [[Nine Elms tube station|Nine Elms.]]<ref name=":1">{{cite press release|url=https://tfl.gov.uk/info-for/media/press-releases/2014/november/northern-line-extension-to-battersea-gets-go-ahead|date=12 November 2014|title=Northern line extension to Battersea gets go-ahead|publisher=Transport for London|access-date=22 January 2018|archive-date=26 May 2021|archive-url=https://web.archive.org/web/20210526082500/https://tfl.gov.uk/info-for/media/press-releases/2014/november/northern-line-extension-to-battersea-gets-go-ahead|url-status=live}}</ref><ref name=":2">{{cite web|title=Northern line extension |url=https://tfl.gov.uk/travel-information/improvements-and-projects/northern-line-extension|access-date=22 January 2018|publisher=Transport for London|archive-date=29 July 2019|archive-url=https://web.archive.org/web/20190729235927/https://tfl.gov.uk/travel-information/improvements-and-projects/northern-line-extension |url-status=live}}</ref> Approved by Wandsworth Council in 2010<ref>{{cite press release|title=Battersea Power Station scheme approved |url=http://www.wandsworth.gov.uk/news/article/10136/battersea_power_station_scheme_approved|publisher=[[London Borough of Wandsworth]]|date=11 November 2010|access-date=12 November 2010|archive-url=https://web.archive.org/web/20131014095827/http://www.wandsworth.gov.uk/news/article/10136/battersea_power_station_scheme_approved|archive-date=14 October 2013}}</ref> and TfL in 2014,<ref name=":1" /> the construction of the line began in 2015. Tunnelling for the project was completed in 2017,<ref name=":0" /> and the extension opened on 20 September 2021.<ref>{{cite web |last1=Prynn |first1=Jonathan|last2=Sleigh|first2=Sophia|date=21 December 2018|title=TfL under fire as Battersea Tube extension is delayed |url=https://www.standard.co.uk/news/transport/tfl-under-fire-as-battersea-tube-extension-is-delayed-by-miscalculations-a4023386.html|url-status=live|archive-url=https://web.archive.org/web/20201023202028/https://www.standard.co.uk/news/transport/tfl-under-fire-as-battersea-tube-extension-is-delayed-by-miscalculations-a4023386.html|archive-date=23 October 2020|access-date=3 February 2021|website=Evening Standard|location=London}}</ref><ref name="BBC-Battersea">{{cite news|date=20 September 2021|title=Northern line extension: Two new Tube stations open|publisher=BBC News|url=https://www.bbc.com/news/uk-england-london-58621491|access-date=20 September 2021|archive-date=20 September 2021|archive-url=https://web.archive.org/web/20210920073208/https://www.bbc.com/news/uk-england-london-58621491|url-status=live}}</ref> Provision has been made for a future extension to [[Clapham Junction railway station]].<ref>{{cite news|last=Henderson|first=Jamie|date=23 June 2013 |title=Clapham Junction next for Northern Line says London Assembly member|newspaper=Wandsworth Guardian|url=http://www.wandsworthguardian.co.uk/news/10501385.Clapham_Junction_next_for_Northern_Line_says_London_Assembly_member/|access-date=12 January 2014|archive-date=24 December 2013|archive-url=https://web.archive.org/web/20131224115148/http://www.wandsworthguardian.co.uk/news/10501385.Clapham_Junction_next_for_Northern_Line_says_London_Assembly_member/|url-status=live}}</ref>