It is in the nature of most proud cities that they have a river flowing through them. We think of the Thames, the Cam, the Isis, and the Seine, in London, Cambridge, Oxford, and Paris respectively.
Norwich has the Wensum. But who has heard of it? More importantly, who has sailed, rowed, sculled, paddled or even taken a cruise on it? Or sat on its riverside, enjoying a quiet drink? Chance would be a fine thing.