The London, Midland and Scottish Railway Royal Scot Class is a class of 4-6-0 express passenger locomotive introduced in 1927. Originally having parallel boilers, all members were later rebuilt with tapered type 2A boilers designed by William Stanier.
Between 1943 and 1955 the whole class was rebuilt to create the Rebuilt Royal Scot Class. The rebuilds were quite substantial, requiring new boilers, frames and cylinders, but in most cases the original frame stretchers, wheels, cab and fittings were retained. The usual procedure was that as each locomotive arrived for rebuilding, it was stripped and the identity transferred to a fresh frameset prepared using the parts recovered from the locomotive that had previously been rebuilt. Initially these too were built without smoke deflectors but later acquired them.
In the 1948 Locomotive Exchange Trials, carried out by the recently nationalised British Railways, a rebuilt 'Royal Scot' proved capable of matching the maximum performance of the much larger LMS Coronation Class.
This add-on faithfully recreates the class during their working lives, in a variety of authentic liveries.