A recent study has revealed a substantial decrease in the estimated number of deaths linked to toxic air in London, with figures suggesting a reduction of approximately 40% over a five-year period. The research, conducted by Imperial College London's environmental research group, estimates that premature deaths attributable to air quality in the capital now stand between 3,800 and 5,100 in 2024. This marks a significant improvement from the 2019 figures, which ranged from 6,400 to 8,000.
The report, commissioned by the Greater London Authority (GLA) and Transport for London (TfL), also found a notable decline in fine particulate pollution – extremely small particles known to have serious health implications. This type of pollution reportedly fell by 28% between 2019 and 2024. Researchers stated that this new study employed a more scientifically rigorous approach compared to earlier assessments of air quality's impact.
London Mayor Sadiq Khan has attributed these positive developments, in part, to the expansion of the Ultra Low Emission Zone (ULEZ). The ULEZ, which requires drivers of non-compliant vehicles to pay a daily charge of £12.50 for entering the zone, was extended across inner London in October 2021 and to the entire city in August 2023. While the report itself does not isolate the impact of ULEZ or any other single policy, Mayor Khan described the evidence for improved public health as "overwhelming and unarguable," stating that "bold action" has reduced pollution and saved lives.
The ULEZ has become the world's largest pollution fee-charging zone, aiming to deter the use of more polluting vehicles. Drivers who fail to meet minimum emissions standards and are not exempt face a £180 fine for non-payment. Over £70 million in penalty charge notices were issued to London drivers in the zone's initial six years, with a significant majority (94%) going to those with multiple unpaid notices.
This new data provides further context to ongoing discussions about air quality policies in urban environments. The connection between air pollution and a range of illnesses, from childhood asthma to dementia, is increasingly recognised, underscoring the importance of initiatives aimed at improving air quality for public health outcomes.