No.46233 'Duchess of Sutherland' is a London, Midland and Scottish Railway (LMS) Princess Coronation Class 4-6-2 "Pacific" type steam locomotive built in 1938 by Crewe Works for the London Midland and Scottish Railway. Built as a high speed passenger locomotive, 46233 was built to haul fast express passenger services such as ‘The Royal Scot’ and ‘The Mid-Day Scot' between London Euston and Glasgow Central as well as other expresses to Liverpool.