Duchess of Hamilton.

The London Midland and Scottish Railway (LMS) Coronation Class is a class of express passenger steam locomotives designed by William Stanier. They were an enlarged version of the LMS Princess Royal Class. They were the most powerful passenger steam locomotives ever to be built for the LMS network, estimated at 3300 horsepower and making them far more powerful than the diesel engines that replaced them. LMS Shop Grey was carried briefly in service on 6229 Duchess of Hamilton from 7 September 1938 until its return to Crewe Works later that year on 9 December to be painted crimson lake as No. 6220 in preparation for the 1939 visit to the New York World's Fair, USA.
(Wikipedia).