Number 3440 City of Truro is a Great Western Railway (GWR) 3700 (or 'City') Class 4-4-0 locomotive, designed by George Jackson Churchward and built at the GWR Swindon Works in 1903. (It was rebuilt to a limited extent in 1911 and 1915, and renumbered 3717 in 1912). Being the first British locomotive to travel in excess of 100 miles per hour (160.9 km/h), and as one of the contenders for the world’s first to do so, its maximum speed has been the subject of much debate over the years.