The BR Standard Class 8 was a class of 4-6-2 Pacific steam locomotive designed by Robert Riddles for use by British Railways. Only the prototype was constructed, which was named Duke of Gloucester. Constructed at Crewe Works in 1954, the Duke, as it is popularly known, was a replacement for the destroyed Princess Royal Class locomotive number 46202 Princess Anne, which was involved in the Harrow and Wealdstone rail disaster of 1952.The Duke was based on the BR Standard Class 7 Britannia design.