The BR Standard Class 4 is a type of steam locomotive designed by the British Railways in the early 1950s. It was part of a series of standard locomotives aimed at modernizing the British railway system. The Class 4 locomotives were versatile, used for both passenger and freight services, and featured a 2-6-0 wheel arrangement. These locomotives were known for their reliability and efficiency, with a total of 150 units built. They were equipped with a standard boiler and could reach speeds of up to 75 mph. The BR Standard Class 4 played a significant role in the post-war era of British rail transport.