Editing Driving Van Trailer (section)

{{Short description|British control car}}
{{distinguish|text=[[British Rail Class 82|Class 82]], which were also numbered in the 82xxx range}}
{{distinguish|text=[[Driving Brake Standard Open]], a different form of control car}}
{{Use dmy dates|date=March 2024}}
{{Use British English|date=February 2018}}
{{Infobox train
| background = #006400;color:white
| name = British Rail DVT
| image = DVT 82205.jpg
| imagesize = 300px
| caption = [[London North Eastern Railway]] Mk4 DVT at [[Peterborough railway station|Peterborough]]
| service = 1989 – present
| manufacturer = Mark 3: [[British Rail Engineering Limited]]<br>Mark 4: [[Metro-Cammell]]
| family = {{plainlist|
* [[British Rail Mark 3|Mark 3]] (82101–82152)
* [[British Rail Mark 4|Mark 4]] (82200–82231)}}
| yearconstruction = 1988 - 1990
| numberbuilt = {{plainlist|
*Mark 3: 52
*Mark 4: 32}}
| numberservice = {{plainlist|
*Mark 3: 8
*Mark 4: 23}}
| numberpreserved = {{plainlist|
*Mark 3: 7
*Mark 4: 0}}
| numberscrapped = {{plainlist|
*Mark 3: 20
*Mark 4: 7}}
| fleetnumbers = {{plainlist|
*82101–82152
*82200–82231}}
| operator = {{plainlist|
* [[Chiltern Railways]]
* [[DB Cargo UK]]
* [[London North Eastern Railway]]
* [[Network Rail]]
* [[Transport for Wales Rail|Transport for Wales]]
}}
| carlength = {{convert|18.83|m|ftin|0|abbr=on}}
| width = {{convert|2.71|m|ftin|0|abbr=on}}
| height = {{convert|3.88|m|ftin|0|abbr=on}}
| weight = {{convert|43.7|t|abbr=on}}
| maxspeed = {{convert|125|mph|km/h|0|abbr=on}} (Mark 3) <br> {{convert|140|mph|km/h|0|abbr=on}} (Mark 4)
| brakes = [[Railway air brake|Air]]
| gauge = {{RailGauge|sg|allk=on}}
}}

A '''Driving Van Trailer''' ('''DVT''') is a [[Great Britain|British]] purpose-built [[control car]] railway vehicle that allows the driver to operate with a [[locomotive]] in [[Push-pull train|push-pull]] formation from the opposite end of a train. A key benefit of operating trains with DVTs is the requirement for fewer locomotives; for example, a second locomotive would otherwise have to join at the other end of the train after arrival at terminal stations to lead the train's onward journey.

The Mark 3 DVT was originally designed and produced by [[British Rail Engineering Limited]] (BREL) during the late 1980s and early 1990s. Unlike many other control cars, such as the  [[British Railways Mark 2|Mark 2]] [[Driving Brake Standard Open|DBSO]], the DVT visually resembles a locomotive, specifically [[British Rail Class 90|Class 90]] for the 82/1 Mark 3 series and [[British Rail Class 91|Class 91]] for the 82/2 Mark 4 series; thus when the train is operating in push mode, it does not appear to be travelling backwards. The vehicles do not have any passenger accommodation due to health and safety rules in place at the time of construction that prohibited passengers in the leading carriages of trains that run faster than {{convert|100|mph|sigfig=2}}.{{Citation needed|date=October 2019}} Historically, it was believed that a train would be unstable at high speeds unless pulled from the front; however, extensive testing and the experience of high speed trains with central power cars, such as the [[Advanced Passenger Train]] (APT) and the [[British Rail Class 373|Eurostar]], have since altered this view.

The later-built Mark 4 DVT was specifically developed to work with the new [[British Rail Mark 4|Mark 4]] carriages of the [[InterCity 225]] on the [[East Coast Mainline]] while the Mark 3 DVT was built to work with the [[British Railways Mark 2|Mark 2]] and [[British Rail Mark 3|Mark 3]] carriages which then comprised the [[InterCity (British Rail)|InterCity]] rolling stock on the [[West Coast Main Line]]. A planned Mark 5 DVT was never produced. Following the [[Privatisation of British Rail]], various private sector train operators have opted to use DVTs in their services. In some cases, such as [[Wrexham & Shropshire]]'s services between [[Marylebone railway station|London Marylebone]] and [[Wrexham General railway station|Wrexham General]] using Mark 3s and [[British Rail Class 67|Class 67]] diesel locomotives, the DVTs required modification to work with new types of locomotives. Other operators have opted to have their DVTs outfitted with [[diesel generator]]s or even traction apparatus, the latter case resulting in the experimental [[British Rail Class 19|Class 19]] locomotive.