LMS Ivatt Class 4

The LMS Ivatt Class 4 2-6-0 is a class of steam locomotive designed by George Ivatt, primarily for medium freight work but also widely used on secondary passenger services. The London, Midland and Scottish Railway ordered 162 of them between 1947 and 1952, but only three were built before nationalisation in 1948; the LMS classified them 4F and British Railways 4MT. The remaining 159 were built by British Railways in three places: 75 were completed at Horwich Works, 50 at Doncaster Works and 37 at Darlington Works. They were used across the system, most of all on the London Midland region, and became the dominant locomotive type on the Midland and Great Northern Joint Railway in East Anglia. The class was withdrawn between 1963 and 1968, and only one example, No. 43106, survives in preservation on the Severn Valley Railway.