Complex sentence: The total number built was 251, with production being shared between Swindon (53) and Crewe Works (198) with the last, 92220 "Evening Star", constituting the final steam locomotive to be built by British Railways in 1960.
Split into simpler sentences: The total number built was 251, production being shared between Swindon (53) and Crewe Works (198). The last of the class, 92220 "Evening Star", was the final steam locomotive to be built by British Railways, in 1960.