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[[File: {{Infobox wagon|image = PO_431_20150320.jpg |thumb|200px|right| caption = Regent Oil & Texaco Wagon 431]]|construc = Powell Duffryn|status = |wagno = 431|othernos = Regent 431, TEX 47881, BR(W) 457 |designed = |diagram = 6/020|lot = |wagtype = 4w Class B Aviation Fuel Tank|capacity = 22 tons<ref name=RHRWS>Railway Heritage Register Wagon Survey</ref>|telcode = |topscode = TSV|brakes = Vacuum|built = 1961|years1 = 1984|events1 = Entered preservation on SVR|years2 = |events2 = |years3 = |events3 = |years4 = |events4 = |years5 = |events5 = |years6 = |events6 = }}In 1960, following on from an earlier Esso example, the Regent Oil Company introduced Private Owner Class B Vacuum braked tank wagons to a similar design with auxilliary suspension and bottom discharge. 92 were built by Chas Roberts and 50 by Powell Duffryn.<ref>[https://paulbartlett.zenfolio.com/texaco Paul Bartlett's photographs] (Retrieved 1 January 2019)</ref><ref name=RHRWS/> This example, Class B Aviation Fuel Tank No 431 was built by Powell Duffryn in 1961 for Regent Oil, and was later used by Texaco as number TEX 47881. It was used in trains for transporting aviation fuel from Edinburgh to Prestwick Airport, for which it was given BR Registration Number BR(W) 457is now a unique vehicle.<ref name=RHRWS/>

==Service==The tank was used by Regent Oil, which was re-branded as Texaco Ltd in 1967.<ref>[https://www.gracesguide.co.uk/Regent_Oil_Co Grace's Guide]</ref> While used by Texaco, it was allocated TOPS number TEX 47881. Its final duty was in freight trains carrying aviation fuel from Edinburgh to Prestwick Airport for which it carried the registration number BR(W) 457<ref name=RHRWS/><ref name=SB9>SVR Stock Book Ninth Edition</ref>. ==Preservation==It arrived on the SVR in with a Chas Roberts-built example [[Regent Oil & Texaco 345 Aviation Fuel Tank Wagon|345]] from Cardiff on 23 July 1984having been acquired by Don Wilcox, and restored to all-over silver Texaco livery. Original plans to store diesel fuel were shelved and it has instead been used to store water for firefighting. <ref name=SB9/> It is seen in Texaco livery at [[Bewdley ]] in March 2015. ==See also==[[Goods Wagons | List of goods wagons]]<br>[[Regent Oil & Texaco 345 Aviation Fuel Tank Wagon]] ==References==