River Severn

The River Severn (, ) is the longest river in Great Britain. It is about long. It starts in the Cambrian Mountains of mid Wales. It then flows through Shropshire, Worcestershire and Gloucestershire. The county towns of Shrewsbury, Worcester, and Gloucester are on its banks. The Severn is the greatest river in terms of water flow in England and Wales.
The river is usually considered to become the Severn Estuary after the Second Severn Crossing. The river then discharges into the Bristol Channel, which discharges into the Atlantic Ocean. The Severn's drainage basin area is , excluding the River Wye and the River Avon which flow into the Severn Estuary.