Top 10 most-improved rivers revealed by Enviroment Agency

A list of the 10 most-improved rivers in England and Wales has been released by the Environment Agency.

Ian Barker, head of land and water at the agency, said Britain's rivers were "the healthiest for over 20 years".

He said work with farmers, businesses and water companies to reduce pollution and improve water quality had paid off.

Laura Yates reports from the River Wandle in South London.

Black and white clip courtesy British Pathe