"The existing London Ultra Low Emission Zone (ULEZ) will expand from the 25th October 2021, to create a single larger zone up to, but not including, the North Circular Road (A406) and South Circular Road (A205). Cars, motorcycles, vans and other specialist vehicles (up to and including 3.5 tonnes), and minibuses (up to and including 5 tonnes) will either need to meet the ULEZ emissions standards, or pay a £12.50 daily charge when driving within the expanded ULEZ zone. The ULEZ operates 24 hours a day, 7 days a week, every day of the year except Christmas Day (25 December)."
https://tfl.gov.uk/m.../ulez-expansion