[[File: PO_431_20130320PO_431_20150320.jpg |thumb|200px|right| Regent Oil & Texaco Wagon 431]]
Private Owner 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) 457.