where is the start of the river severn
River Severn The River Severn (Welsh: Afon Hafren, Latin: Sabrina) is a river in the United Kingdom. At about 220 miles (354 km), it is usually considered to be the longest in the UK.[4][5] It rises at an altitude of 2,001 feet (610 m) on Plynlimon, close to the Ceredigion/Powys border near Llanidloes, in the Cambrian Mountains of mid Wales. It then flows through Shropshire, Worcestershire and Gloucestershire, with the county towns of Shrewsbury, Worcester and Gloucester on its banks. With an average discharge of 107 m3/s (3,800 cu ft/s) at Apperley, Gloucestershire, the Severn is the greatest river in terms of water flow in England and Wales.