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[[File:{{Infobox crimson and cream carriage|image = BR_4550_20150307.jpg |thumb|300px|right| caption = BR Tourist Standard Open 4550|construc = BR York|status = In service|carno = E4550|livery = BR Maroon|othernos = NE4550|designed = |diagram = 93|lot = 30243|cartype = [[:Category: Carriage Type TSO|TSO]]|topscode = [[:Category: Carriage Type TSO|AC21]]|seats = 64 standard|built = 1956|years1 = 1984 |events1 = Preserved on SVR|years2 = |events2 = |years3 = |events3 = |years4 = |events4 = |years5 = |events5 = |years6 = |events6 = }}4550 is a BR Mk 1 Tourist Second Open (TSO) No 4550 was built in 1956 . The ‘Open Second’ seats 64 passengers at York tables, with three cross-vestibules to diagram number 93 lot number 30243enable speedier loading and unloading of passengers.

==4550 in service==4545 was built at York in 1957 to diagram number 93 (AC204), lot number 30243. It went into service on the Eastern Region in March 1957, where it remained apart from a brief allocation to the Northeast region between September 1967 and January 1968.<ref name=Longworth>[[Bibliography#Other References|Longworth (2013)]] p.57.</ref> It was preserved eventually withdrawn from service at Heaton, Newcastle.<ref>SVR Stock Book 9th edition</ref> ==Preservation==4550 arrived on the SVR from Heaton on 6 December 1984.<ref>SVR News 23</ref> It underwent a 2-year heavy overhaul at Bridgnorth in 1995, with another medium level repair at Kidderminster in 2003. The seat covers were renewed in 1984 and is seen photographed 2001 using a moquette pattern originally produced for the standard Network South East interior.<ref>Notice in the carriage</ref>. The photograph shows 4550 in service in March 2015 as part of the BR Maroon set. It was moved into the Kidderminster Carriage Works paint shop for attention in September 2016in what turned out to be a major repair to one of the toilet floors, to doors and paintwork, which was completed in February 2017.  4550 is owned by [[The 75069 Fund]].

*[[Carriages#BR Designed Coaches | List of carriagespreservation groups]]<br>: *[[BR 4545 Tourist Standard Open | Previous The 75069 Fund]]<br>: *[[Carriages#BR 4593 Tourist Standard Open Designed Coaches | Next List of carriages]]

Railway Heritage Register Carriage Survey<brreferences />

*[http://www.cs.vintagecarriagestrustrhrp.org.uk/se/CarriageInfo.asp?Ref=1373 4550 on vintagecarriagestrust.orgRailway Heritage Register On-Line]<br>  {{CarriageNavbox}}