Levels of deadly pollutants have dropped, with significant improvements in capital’s most deprived areas

People in London have been breathing significantly cleaner air since the expansion of the ultra low emission zone (Ulez), a study has found.

Levels of deadly pollutants that are linked to a wide range of health problems – from cancer to impaired lung development, heart attacks to premature births – have dropped, with some of the biggest improvements coming in the capital’s most deprived areas.