The BR Standard Class 3 2-6-2T was a class of steam locomotive designed by Robert Riddles for British Railways. It was essentially a hybrid design, the chassis being closely based on and sharing a number of parts with the LMS Ivatt Class 4, and having a boiler derived from a GWR No.2 boiler as fitted to the GWR Large Prairie 2-6-2T and 5600 Class 0-6-2T tank engines.

The 82045 Steam Locomotive Trust is building a "new" class 3 tank locomotive to carry the next number in line had it been built under BR auspices. The Trust believes that a sprightly performance will be delivered through the 17½" x 26" cylinders. This, coupled with the modest axle load, will make the locomotive an ideal design for today's heritage railways.

The locomotive is under construction at the Severn Valley Railway with the frames, cab, driving wheels, smokebox and cylinders assembled. Further parts and patterns continue to be amassed. With construction work on the new engine advancing every week the Trust classifies 82045 as the 1001st steam locomotive to a BR Standard design since the commencement of its construction follows that of 72010 Hengist.