The Severn Valley Railway has long been considered by many to be Britains premier heritage railway. That reputation was earned early thanks to the quality of locomotive and carriage restoration, the careful refurbishment of stations and the standard of service offered to visitors. As with all heritage railways it has had to adapt to changing expectations over the years whilst attempting to keep the original aims of railway preservation at the heart of everything it does. This guide traces the history of the original Severn Valley Railway from the early plans of the 1840s, through its days when operated by first the Great Western Railway and then British Railways. The last chapter looks at the challenges and the achievements of the preservation era and the whole narrative should be of interest to anyone keen to know more of the story of a national treasure.