Road runoff pollution damages London's rivers, study finds

Mayor Sadiq Khan calls for government action to protect the capital's waterways

The mayor of London, Sadiq Khan, has called on the government to provide more funding to clean up the pollution blighting London's rivers, after a study highlighted the toxic effects on water from driving in the capital's most congested areas.

The River Brent in west London and the River Lea in the east, at 18 miles and 42 miles respectively, are worst affected by pollution from roads. Concern over pollution has concentrated on toxic air, which is killing and shortening the lives of tens of thousands of people every year, but road pollution is also damaging the water supply.