LMS Royal Scot Class 6100 Royal Scot

London Midland and Scottish Railway (LMS) Royal Scot Class 6100 (British Railways' number 46100) Royal Scot (originally 6152 The King's Dragoon Guardsman prior to 1933 identity swap) is a preserved British steam locomotive.

The original 6100 was the first of its class, built in 1927 by the North British Locomotive Company in Glasgow. It was named Royal Scot after the Royal Scots.

In 1933, 6152 The King's Dragoon Guardsman and 6100 swapped identities permanently. 6152 had been built at Derby Works in 1930. The new Royal Scot was sent to the Century of Progress Exposition of 1933 and toured Canada and the United States with a train of typical LMS carriages.

It was given special commemorative plates that sit below its nameplates which read:

6100 was renumbered 46100 by British Railways after nationalisation in 1948. In 1950 46100 was rebuilt with a 2A taper boiler, and the words "Prior to conversion" were added to its nameplates. It became a markedly different engine. In October 1962 46100 was withdrawn from service in Nottingham.

46100 was bought by Billy Butlin of Butlins holiday camps after withdrawal and after cosmetic restoration into LMS crimson lake at Crewe Works, although this was the original livery received, the locomotive did not carry it after being rebuilt (only one rebuilt Royal Scot ever carried LMS crimson lake livery and that was 6170 Royal British Legion). It was then towed from Crewe Works to Nottingham by Black 5 No. 45038 and then from Nottingham to Boston by B1 No. 61177 on 12 June 1963.

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