What is the difference between London’s ULEZ and LEZ?

In the news on 10 March, 2025

This news article reports on the impact of the ultra-low emission zone (ULEZ) and the low emission zone (LEZ) in London. The article features references to a study by the Institute which showed a meaningful link between the introduction of the LEZ and school children performing better in their SATs.

Evening Standard, 8 March 2025