The New Bedford River reference article from the English Wikipedia on 24-Apr-2004
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New Bedford River

The New Bedford River is a tributary of the River Great Ouse in the Fens of Cambridgeshire, England. Both this river and its "twin", the Old Bedford River (also known as the Hundred Foot Drain), are named after the Duke of Bedford who funded the construction of both rivers. The area between the two rivers (20m long, 1m wide) is above sea level and is flooded during winter. At Welney, these "washes" provide an ideal habitat for wildfowl and other birds, and the Wildfowl and Wetlands Trust has established a nature reserve here, the WWT Welney.