 Robert Urie made a significant contribution to the development of more powerful express passenger and goods locomotives for use on the London and South Western Railway main line, with simple yet robust designs.In particular his LSWR H15 class, LSWR N15 class and LSWR S15 class 4-6-0 locomotives continued to be built by the Southern Railway under Richard Maunsell's direction.His son David Chalmers Urie was a locomotive engineer with the Highland Railway and later the London, Midland and Scottish Railway.