London Issues Fourth High Pollution Alert of 2026 as Fog Traps Particulates

London Mayor Sadiq Khan has issued a high air pollution alert for Tuesday, November 10, the fourth high pollution alert of 2026. Days of fog combined with light winds have allowed particulate pollution to accumulate. The forecast comes from the Environmental Research Group at Imperial College London.

Boroughs, schools and hospitals notified; alerts on Tube and bus screens

City Hall has notified London's boroughs, schools and residents, displayed the alert on electronic screens at Tube and bus stops, and alerted general practitioners and emergency departments.

Mayor urges public transport; people with heart and lung conditions warned

The mayor urged Londoners to use public transport, switch off engines when parked, and avoid unnecessary domestic burning. People with heart or lung conditions were advised to take particular care and limit outdoor activity during the worst of the pollution.

Sources: London City Hall (as reported in the media), Imperial College London Environmental Research Group.