London boroughs which opposed Ulez expansion see biggest pollutant cut – study

Drivers have been handed nearly £415 million in fines for non-payment of Ulez fees since the scheme expanded (Yui Mok/PA) - (PA Archive)

London boroughs which opposed Sir Sadiq Khan’s expansion of the ultra-low emission zone (Ulez) have seen the largest reductions in a harmful air pollutant because of the policy, according to a new report.

The City Hall study analysed the estimated reduction of nitrogen oxides (NOx) in 2024 compared with a scenario where the mayor’s extension of the pollution charging zone for vehicles did not happen.