Deben

The River Deben is a river in Suffolk rising to the west of Debenham, though a second, higher source runs south from the parish of Bedingfield. The river passes through Woodbridge, turning into a tidal estuary before entering the North Sea at Felixstowe Ferry. The mouth of the estuary is crossed by a ferry connecting Felixstowe and Bawdsey.

Source: Wikipedia https://en.wikipedia.org/wiki/River_Deben