The LSWR T9 class was a class of 66 4-4-0 steam locomotive designed for express passenger work by Dugald Drummond and introduced to services on the LSWR in 1899. One example has been preserved after British Railways ownership. They were given the nickname of "Greyhounds" due to their speed, up to 85 miles per hour, and reliability.

Intended for express passenger work in South-West England, 66 were eventually built and saw several improvements throughout their service careers. The class operated until 1963 when the last example, No. 30120, was withdrawn. 30120 was preserved by the National Railway Museum.