The BR Standard Class 4 2-6-0 is a steam locomotive designed by Robert Riddles for British Railways (BR). The type was designed at the former LNER works at Doncaster which was also responsible for building 25 of the 115-strong class. The remaining 90 were split between Horwich and Derby Works.
The last in the series, No.76114, was also the final steam engine to be constructed at the 'Plant' (as Doncaster works was known). The Standard Four Mogul was essentially a standardised version of the LMS Ivatt Class 4, and was primarily intended for freight use and its route availability was virtually unrestricted. Batches were allocated to every BR region except the Western. The class was extremely versatile and well-travelled, and one example lasted into 1968, the final year of BR steam. Examples survive in preservation.