Ultra low emissions zone expansion cut London pollutants by up to 26% – study

London’s Ultra Low Emissions Zone was launched in April 2019, extended in October 2021, and will cover all 32 boroughs at the end of August 2023. Photograph: Xinhua/REX/Shutterstock

The initial expansion of London’s ultra low emissions zone (Ulez) for motor vehicles has brought notable benefits in reducing pollution, a study has found as the mayor prepares for a big extension to its boundaries.

The report by officials at the Greater London authority and Transport for London could help Sadiq Khan counter a political backlash to the imminent further expansion.