Study update

We are excited to announce a new CHILL study publication is out showing the impact of London’s Ultra Low Emission Zone (ULEZ) on children’s lung growth. Read more about the findings on the Research Publications tab and press coverage in our News tab.

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In June 2026, we completed our Adolescent Extension Study, where we returned to secondary schools for an extra year of data collection.

Since 2018, we were delighted to have seen over 1300 children across primary and secondary schools in London and Luton. 

Due to the COVID-19 pandemic, we extended the study to continue following our participants through to secondary school. It has been fantastic to see the children’s continued interest and engagement with the study as they have grown up – in some cases, even into their teenage years.

Our Centre of the Cell team continued to host workshops with primary and secondary school classes, engaging children in the science of air pollution and encouraging creative problem solving to develop innovative strategies to reduce air pollution.

We are still working on analysing other health outcomes, including physical activity, cognitive function, and mental health. We hope to share those findings soon. Our final study reports will be accessible through the Research Publications tab.

The CHILL study has been a huge undertaking and we could not have done it without the support and enthusiasm of our partner schools. We would like to give a huge thank you to our participants, schools, and multi-site teams as we celebrate key findings on children’s lung growth!