This is based on the Walkham 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 major changes to the structure. The masonry piers were
heightened and the wooden spans were replaced by deck plate girder spans. Made by request. Many thanks to Mike Brassington for the pics
and info.