Editing Chiltern Main Line (section)

==Future==
===Battery/diesel trains===
In September 2021, Class 168/3 ''HybridFlex'' battery/diesel trains were introduced, with lower emissions.<ref>{{cite web |date=22 July 2021 |title=Chiltern's first diesel-battery hybrid train makes passenger debut |url=https://www.railjournal.com/fleet/britains-first-diesel-battery-hybrid-train-makes-passenger-debut/ |website=railjournal.com}}</ref>  The trains operate on batteries, giving zero emissions when in stations or sensitive urban areas. However, the trains were removed from service in September 2023 as the diesel engine emitted high pollutants in stations.<ref>{{cite web |url=https://www.standard.co.uk/business/disappointment-as-chiltern-railways-scraps-hybrid-train-plans-b1105834.html |title=Disappointment as Chiltern Railways scraps hybrid train plans |first=Simon |last=Hunt |date=8 September 2023 |website=Evening Standard |access-date=15 July 2024}}</ref>

===Electrification===
No section of the line is electrified but, in 2010, the then chairman of Chiltern Railways, Adrian Shooter, indicated that electrification was being considered, though not in the immediate future. He added: "We could do some very interesting things with high-acceleration [[electric multiple units]] and possibly some further infrastructure work."<ref name=shooter>{{cite magazine |last=Broadbent |first=Steve |title=Happy Ever After |magazine=[[Rail Magazine]] |issue=643 |date=5 May 2010|page=16 |location=Peterborough}}</ref>

===Other plans===
There are several proposals:
* The restoration of the quadruple track between [[South Ruislip station|South Ruislip]] and [[West Ruislip station|West Ruislip]], allowing trains to call at both stations without blocking the line.{{citation needed|date=December 2012}} Triple track currently exists at West Ruislip, with the up platform loop still in situ, and at South Ruislip, with the [[rail directions|''Down'']] Main through line in situ. This would involve the reconstruction of the ''down'' platform at West Ruislip, the reconstruction of the ''up'' platform at South Ruislip and the demolition of West Ruislip [[signal box]].
* Building of a new combined [[West Hampstead Interchange]], bringing together what are currently three close by, but physically separated stations to allow easy interchange with the [[London Overground]] (Mildmay Line), [[London Underground]] ([[Jubilee line]]) and [[Thameslink and Great Northern|Thameslink]] ([[Thameslink (route)|Thameslink line]]) and Chiltern Railways, with new Metropolitan line platforms possible.<ref>{{cite web |url=http://www.camden.gov.uk/ccm/cms-service/download/asset/?asset_id=564194|title=Planning Framework for West Hampstead Interchange Area Appendix 2 |publisher=London Borough of Camden |date=19 April 2005 |access-date=29 July 2008 |page=25 |archive-url=https://web.archive.org/web/20110611231733/http://www.camden.gov.uk/ccm/cms-service/download/asset/?asset_id=564194|archive-date=11 June 2011|url-status=dead}}</ref>