City of Truro was a locomotive of which British railway?

City of Truro was a locomotive of the Great Western Railway.

It was built at Swindon Works in May 1903 as part of the GWR 3700, or City, Class. The ten locomotives in its original batch were named after cities served by the Great Western Railway, and the engine received the number 3440. In December 1912, the batch was renumbered 3710–3719, making City of Truro number 3717.

The locomotive became famous for its reported 1904 high-speed run while hauling the Ocean Mails special from Plymouth to London Paddington. That achievement, although disputed by later researchers, helped make City of Truro one of the most recognizable preserved British steam locomotives.

It was partially rebuilt in 1911 and 1915, including the later addition of a superheater and piston valves. The other options belonged to separate railway companies: the Midland Railway, Southern Railway and London and North Eastern Railway. Great Western Railway was commonly abbreviated GWR.