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Dugald Drummond (1 January 1840-8 November 1912) was a Scottish locomotive engineer. He had a career with the North British Railway, LB&SCR, Caledonian Railway and London and South Western Railway. He was the brother of the engineer Peter Drummond.
He was a major locomotive designer and builder and his London and South Western Railway engines continued in main line service with the Southern Railway to enter British Railways service in 1947.