This is based on the Cann Viaduct on the Launceston Branch which ran from Plymouth, Devon to Tavistock. Originally
built in the 1880s in broad gauge (7ft 1/4 in), this is as it appeard circa 1910 after the original wood and stone structure was replaced
with a masonry arch viaduct. Made by request. Many thanks to Mike Brassington for the pics and info.