The River Banwell is a small river in Somerset, England. It begins life as a series of springs near the Church of St Andrew in Banwell where they once filled a large pool below the church. It then flows north east of Weston-super-Mare and on to Woodspring Bay where it enters the Bristol Channel, at St Thomas's Head, which forms the eastern boundary of …The River Banwell is a small river in Somerset, England. It begins life as a series of springs near the Church of St Andrew in Banwell where they once filled a large pool below the church. It then flows north east of Weston-super-Mare and on to Woodspring Bay where it enters the Bristol Channel, at St Thomas's Head, which forms the eastern boundary of Sand Point and Middle Hope, a short distance from Woodspring Priory.