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==Class 4 tanks in service on the Severn Valley==
Class 4 tanks’ route availability was rated as ‘Blue’, with the Severn Valley branch classified as ‘dotted blue’ from [[Bewdley]] to [[Buildwas]].<ref>[ http://www.michaelclemensrailways.co.uk/?atk=634 ‘Locomotive Route Availability’, Michael Clemens’ Railways] (Retrieved 30 March 2017)</ref> This should have restricted their speed to 25mph, and so limited their use.
Several Class 4 tanks were allocated to [[Kidderminster Shed]] until withdrawal in 1965.<ref>[http://www.brdatabase.info/locoqry.php?action=class&type=S&id=726401&page=fleet 82000 page, BRDatabase] (Retrieved 30 March 2017)</ref> In addition, a few were allocated to [[Shrewsbury]] from mid-1962 onwards, having been displaced from the London, Tilbury and Southend line by electrification. They remained until the end of passenger working, especially north of [[Bridgnorth]].<ref>[[Bibliography#Books|D.J. Smith (1968)]]</ref> There is little photographic evidence of their use on the Severn Valley, with [[80072]] photographed on the line on three occasions during the winter of 1962-63 and 80078 at Bridgnorth in 1963 working from Shrewsbury.<ref> SVR News No. 15</ref> It appears they featured much less regularly than the BR Standard 3MT 82000 tanks and LMR Ivatt 2MT 41000 tanks also in use from Shrewsbury at that time.
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|pressure = 225 lb/sq in
}}80079 is a BR Standard Class 4 2-6-4T tank engine designed by R.A. Riddles. The Class 4 tank engine was derived from the ex-LMS Fairburn 2-6-4T, and was used mainly on commuter and outer suburban services. A total of 155 were built, of which 15 have survived into preservation.
==80079 in service==
80079 was built in 1954 at BR’s Brighton works and entered service at Plaistow in March of that year, before moving to Tilbury a month later.<ref name="BRDatabase">[http://www.brdatabase.info/locoqry.php?action=locodata&type=S&id=80079&loco=80079 BRDatabase] Retrieved 29 January 2015.</ref> From there, 80079 mainly worked passenger services between London Fenchurch Street and Shoeburyness.<ref name=StockBook>SVR Stock book 9th edition</ref> While hauling a passenger train on 30 January 1958, 80079 overran signals in thick fog and was in a rear-end collision with another passenger train at Dagenham, Essex. Ten people were killed and 89 were injured.<ref>Red for Danger. Rolt, L.T.C. (1955, rev. 1966)</ref><ref>[http://www.railwaysarchive.co.uk/documents/MoT_Dagenham1958.pdf Ministry of Transport Accident report]</ref>
After repair, 80079 continued in service at Tilbury, before moving to the Croes Newydd shed, Wrexham in July 1962. The locomotive was withdrawn from there in July 1965 and taken to [[Barry Scrapyard]], arriving in January 1966.<ref name="BRDatabase" /><ref name="BarryList"> Beckett and Hardingham (2010), The Barry List 10th Edition</ref>
==80079 in preservation==
[[File:BR class 4MT tank engine No 80079 at Rainhill.jpg|thumb|300px250px|right|80079 at Rainhill, May 1980]][[File:80079 and 43106 approach Tram Inn.jpg |thumb|250px|right| Welsh Marches Pullman with 43106, February 1983]]
80079 was considered the best of the 14 standard tanks at Barry. An appeal by the 'Passenger Tank Fund' for funds to acquire the locomotive was published in SVR News in Autumn 1970.<ref>SVR News 18</ref> A share issue to raise the £3,000 purchase price was successfully completed by Spring 1971<ref>SVR News 19</ref> and 80079 became the 13th locomotive to leave Barry,<ref name="BarryList" /> arriving at the SVR by rail on 15 May, 1971.
|19 Apr 1980||Black Countryman || Hereford - Manchester Victoria (+ Northwich L/E) || D/H with 5000. 80079 first main line run || [http://www.sixbellsjunction.co.uk/80s/800419_1.htm SBJ] ||56-9
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|20 May 1980||[[Rocket 150 ]] Rainhill || Northwich-Bold Colliery || L/S, with 35028 || ||56-9
|-
|09 Jun 1980||Rocket 150 Rainhill || Bold-Colliery-Bridgnorth || D/H + LMS coach || ||56-9
|20 Mar 1999|| || Bristol-Tytherington/Westerleigh Shuttles || Ran as scheduled || UKS ||
|-
|21 Mar 1999||Avonmouth Shuttles || BristilBristol-Avonmouth x3 || Ran as scheduled || UKS ||
|-
|02 Apr 1999||Dawlish Donkey || Exeter-Newton Abbot-Exeter x3 || || ||130-32
In December 1981 filming took place for an episode of [[List of film and TV productions filmed on the Severn Valley Railway#TV Commercials and other | ITV’s ''Game for a Laugh'']]. This featured musician and entertainer Joe Brown firing 80079, a job he previously did for BR while a fireman at Plaistow.
In early 1987 work was carried out on the boiler in an attempt to extend the 'ten year ticket' for a further three years.<ref>SVR News 83</ref> This was partially achieved, with 80079 being withdrawn due to loose/thin flue tube ends in early 1989.<ref>SVR News 92</ref> Apart from the boiler, the locomotive was considered in good condition mechanically, so when an overhaul began in 1990 the work mainly comprised new bunker platework, new pipework, reconditioned cab fittings and repairs to the tanks.<ref>SVR News 98</ref> Some attention was also required to the frame.<ref>SVR News 105</ref> In spring 1991 an [[:Category:SVR fundraising lotteries|SVRA Birmingham Branch raffle]] helped raise funds for the boiler work.<ref>SVR News 98/99</ref>
80079 returned to service in May 1993, making an early appearance on the Central Wales main line before spending the summer at the Llangollen Railway.<ref>SVR News 106-107</ref> During the second ticket the locomotive was a consistent performer and in 2000 recorded 12,849 miles, the highest mileage of any SVR locomotive in any single year between 1967 and 2004. The locomotive finally succumbed to tube failure in summer 2002, shortly before the 'ten year certificate' expiry date.<ref>SVR News 140</ref>
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After cosmetic restorationat Bridgnorth, 80079 was temporarily placed on display at the [[National Railway Museum | NRM Shildon]] in March 2005.<ref>SVR News 150</ref>. It was then one of the first batch of locomotives to be displayed in [[The Engine House]] at [[Severn Valley Railway Timeline 2000-2009#2008 | opening in 2008]]. {{As of|20172021}}, it remains on display there. 80079 is owned by The [[Passenger Tank Fund]].
==Reported sale==
*[[The Severn Valley Railway on the main line]]
*[[SVR-based locomotives visiting other events]]
*[[Steam Locomotives visiting the SVR for galas]]
*[[Steam Locomotives hired by the SVR]]
*[[Locomotives used on the Severn Valley Branch in commercial service]] for a description of the Class's use on the Severn Valley branch
==References==
[[Category:Featured articles]]
[[Category:SVR fundraising lotteries]]
