大象传媒

For the latest in our series on rivers, we turn to Leeds and to listener Rachael Unsworth, a tour guide.

One of her tours tells the city's history from the perspective of its river - the Aire. She says the name of the river is a Celtic word, or it could be even older, meaning "Strongly Flowing".

(Photo: Looking through Railway Viaduct On East Elevation And River Aire
Credit: Getty Images)