[[File: {{Infobox diesel loco|image = D821_20110522.jpg |thumbcaption = D821 Greyhound at Bridgnorth in 2011|200pxconstruc = BR Swindon Works|rightwheels = B-B| power = Diesel Hydraulic|status = Operational|locono = D821 |designed = British Railways|locotype = '''Class 42'''|built = 1960|years1 = 1973|events1 = Purchased by precursors of the Diesel Traction Group|years2 = 1981|events2 = Overhauled at Swindon|years3 = 1991|events3 = Arrived on SVR|years4 = 2014|events4 = Overhaul began at Old Oak Common|years5 = 2018|events5 = Returned to traffic|length = 60ft|weight = 78t}}The Post-War BR Modernisation Plan called for the introduction of a range of Diesel locomotives. Although the majority were diesel electric, the Western Region at Swindon developed the [[UIC classification | B-B]] diesel-hydraulic Class 42 ‘Warship’ class (all bar two of the class being named after Royal Naval vessels). D821 is one of two preserved examples of the 38 originally built.<ref name = "Wikipedia">Wikipedia</ref> The last HMS Greyhound(H05) was a G-class destroyer, launched in 1935 and sunk by German dive bombers in 1941 in the battle for Crete, with the loss of 100 lives.<ref>[http://hmscavalier.org.uk/casualtySearch.php?surname=&forenames=&ship=greyhound&page=1 Casualty Search]](Retrieved 24 July 2019)</ref> An earlier HMS Greyhound, a Greyhound-class destroyer, also saw service from 1900 to 1919. A number of other Naval vessels have also carried the name.<ref name = "Wikipedia" />
==D821 in service==
The Post-War D821 Greyhound was outshopped from BR Modernisation Plan called for the introduction Swindon Works in May 1960, and served mainly at Plymouth Laira with brief spells at Newton Abbot.<ref>[http://www.brdatabase.info/locoqry.php?action=locodata&type=D&id=821&loco=821 BR Database]</ref> While in service D821 carried various liveries including green, maroon and blue. She was withdrawn from service on 3 December 1972, with more than 1 million miles of a range main line working.<ref name = "SVR9">SVR Stock Book 9th Edition</ref> ==D821 in preservation==D821 was bought by members of the [[Diesel locomotivesTraction Group]], becoming the first main line diesel to be sold for preservation. Although In May 1973 D821 moved from Laira to Didcot, another first as a preserved private owner loco running on the main line under its own power, before the ban on such running was imposed. It moved again in the following year to the private Kings Meadow sidings just east of Reading station, in the majority were diesel electricReading Gas Works site, where it was a notable sight from trains passing on the nearby Great Western Region at Swindon developed main line. From 1975 it was in the B-B diesel-hydraulic Class 42 ‘Warship’ class (all bar two company of the class being named after Royal Naval vessels)DTG's [[BR Class 35 D7029]].
D821 Greyhound was outshopped from BR Swindon Works in May 1960, Between February 1977 and served mainly April 1981 the locomotive underwent an overhaul at Plymouth Laira with a brief spell at Newton Abbot. While in service D821 carried various liveries including greenSwindon, maroon and bluethen moved to the North Yorkshire Moors Railway. She was withdrawn from service It finally arrived on the SVR in December 1972, with more than 1 million miles of main line workingSeptember 1991. <ref name ="SVR9"/>
HMS Greyhound An overhaul commenced in 2014.<ref>[http://www.svr.co.uk/MeetTheLoco.aspx?id=90 SVR meet the Locomotives]</ref> After a long period under repair at Old Oak Common (H05OOC) was a G-class destroyer, launched it returned to the SVR after the OOC open day in 1935 and sunk by German dive bombers in 1941September 2017<ref>[http://www.bropendays.co.uk/oldoak2017.html BR Open Days.co. An earlier HMS Greyhound, a Greyhound-class destroyeruk] (Retrieved 4 June 2023)</ref>, also saw service from 1900 before returning to 1919. A number of other Naval vessels have also carried use in April 2018 in time for the namefollowing month's [[Diesel galas|Spring Diesel Festival]].
==D1013 in preservation==D821 was bought by members From 2021 it saw extensive bodywork repairs, replacement of the Diesel Traction Groupprimary suspension springs, becoming the first main line diesel attention to be sold for preservation. In May 1973 D821 moved under her own power to Didcot, moving again in the following year to brake system and a private siding in Readingrepaint into BR Blue with full yellow ends. Between February 1977 and April 1981 the locomotive underwent an overhaul at Swindon<ref>SVR News 218, Summer 2022, and then moved p. 23</ref> It returned to traffic for the North Yorkshire Moors Railway. She finally arrived on the SVR in September 19912023 Spring Diesel Festival.
==Sources==D821 is a popular [[SVR Stock Book Ninth Edition-based diesel locomotives visiting other events|visitor to other heritage railways]].
==See also==
[[Diesel Locomotives]]<br>[[SVR-based diesel locomotives visiting other events]]<br>[[Diesel Traction Group]]<br>[[Locomotive numbering|Locomotives running under different identities]] ==References==<references/> ==Links==[https://en.wikipedia.org/wiki/British_Rail_Class_42 BR Class 42 on Wikipedia]<br>[http://www.westernchampion.co.uk/loco-d821.php Diesel Traction Group website]<br> {{DieselNavbox}} [[Category:Featured articles]][[Category:Operational passenger hauling diesel locomotives]]
