Fifty-two LMS ˜Patriots were built by the LMS, with 42 emerging from Crewe Works and the remaining ten from its Derby Works. They were designed for hauling express passenger trains on the West Coast Main Line and all carried names with a military association. They operated in their original parallel boiler form until rebuilt with tapered boilers under William Stanier between 1946 and 1949.No. 5540 ˜Sir Robert Turnbull is in an LMS Crimson Lake livery. It is named after Robert Turnbull who served as Lieutenant Colonel in the Engineer and Railway Staff Corps and who also served the LNWR as its General Manager. He was knighted in 1913.