West Yard Works was the Taff Vale Railway's locomotive repair and construction factory. It was located in Cardiff between Bute Street and the Glamorganshire Canal. A small engine shed with room for one locomotive and a repair shop was built there when the railway was first constructed in 1839, but much of the work had to be carried out in the open air. In 1846 Henry Clement was appointed as the railway's Resident Engineer and one of the first things he did was to have a locomotive works built there. In 1857 the first locomotive was built at the works, 'Venus' a small 2-4-0 passenger loco.