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((Use dmy dates|date=May 2017))
((Use British English|date=May 2017))
((More citations needed|date=February 2022))

((Infobox train
|background   = #006400
|name         = G Stock
|image        = File:Hugh llewelyn 4248 (6461797141).jpg
|caption      = G/Q23 stock at London Transport Museum, 18 June 2009 
|manufacturer = [[Gloucester Railway Carriage & Wagon Company|GRC&W]]
|service      = 1923–1971
|family       = 
|replaced     = 
|lines        = 
|carlength    = ((convert|49|ft|2|in|m|2|abbr=on))
|trainlength  = 
|width        = ((convert|9|ft|0+1/16|in|m|3|abbr=on))
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|maxspeed     = 
|weight       = ((convert|33.6|LT|t ST|abbr=on))
|seating      = 44
|stocktype    = 
|notes        = ((Portal-inline|size=tiny|London transport))
))

The '''G Stock''' were 50 [[electric multiple unit]] [[train]] carriages built for the [[District Railway]] in 1923 by [[Gloucester Railway Carriage and Wagon Company|Gloucester RC&W]].<ref>((cite book |last1=Green |first1=Oliver |author1-link=Oliver Green |title=London's Underground |date=2019 |publisher=White Lion Publishing |isbn=9780711240131 |page=107))</ref> They operated on the [[District line]] of the [[London Underground]] until 1971 (with most cars being withdrawn in the early 1960s).

==Construction==
The G Stock was built to allow the scrapping of some of wooden-built [[London Underground B Stock|B Stock]] trailer cars which were in poor condition. Some steel-framed B Stock motor cars were converted to trailers, themselves being replaced by new G Stock motorcars. The G Stock consisted entirely of motor cars, all built with a [[Clerestory#Transportation|clerestory]] roof similar in style to the B Stock with which they would work.

==Q Stock==
In 1938, forty-eight of these cars were rebuilt when the [[District line]] was standardising its post-1923 stock and were reclassified as '''Q23 Stock'''.<ref name="Long2010">((cite book |last1=Long |first1=David |title=The Little Book of the London Underground |date=2010 |publisher=History Press |isbn=9780752462363 |page=83))</ref> A major part of the [[London Underground Q Stock|Q Stock]] project was the replacement of the potentially dangerous manually operated sliding doors (which could be opened by passengers between stations) with air operated doors controlled by the guard.<ref>((cite web |title=Railway vehicle; LER Q23-stock driving motor car, No. 4184, 1923 |url=https://www.ltmuseum.co.uk/collections/collections-online/vehicles/item/1993-4 |publisher=London Transport Museum |access-date=9 December 2021))</ref>

==South Acton shuttle==
The two remaining cars were rebuilt into single cars for use on the [[South Acton, London|South Acton]] shuttle, replacing a [[London Underground B Stock|B Stock]] car. These two cars, numbered 4167 and 4176, were not rebuilt into Q Stock and were classified '''G23 Stock'''.<ref name="Long2010" />

In 1965, several cars were renumbered by adding 100 to the number to avoid conflicting numbers with the [[London Underground 1967 Stock|1967 Stock]] being built for the [[Victoria line]].

==Withdrawal==
The majority of the cars were withdrawn in the early 1960s as CO/CP Stock trains transferred from the Metropolitan line started to become available. The last of the Q Stock was withdrawn in 1971.

Two driving motors have been preserved.
* DM no. 4184 - [[London Transport Museum]], [[Acton, London|Acton]] 
* DM no. 4248 - [[London Transport Museum]], [[Covent Garden]]

==References==
((reflist))

((London Underground Rolling Stock))

[[Category:Metropolitan District Railway]]
[[Category:London Underground electric multiple units|G]]
[[Category:Train-related introductions in 1923]]


((London-tube-stub))

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