High levels of air pollution have been forecast across London as an alert has been issued by City Hall.

According to a recent report, a combination of light winds and local pollution sources will contribute to worsening air quality across the capital.

City Hall has issued a high air pollution warning for Thursday after forecasters from Imperial College London detected an increase in pollution levels drifting in from mainland Europe.

Mayor Sadiq Khan urged Londoners to switch off vehicle engines while stationary and to avoid burning wood or garden waste to help reduce pollution levels.

In a press release sent to City News, The Deputy Mayor of Environment and Energy, Mete Coban said:

London’s toxic air is responsible for around 4,000 premature deaths in the capital each year, which is why the Mayor has done everything in his power to tackle it.

Coban highlighted that air pollution is responsible for around 4,000 premature deaths in London each year, reinforcing the importance of measures to tackle toxic air.

“We are urging Londoners to look after themselves in this pollution alert, stop their engines idling, and refrain from burning wood or garden waste – all of which contribute to high levels of pollution. This is particularly important in order to protect those who are most vulnerable as we continue working to build a safer and greener London for all.”

City Hall notifies residents, schools, and local authorities whenever moderate, high, or very high pollution levels are expected. Alerts are also displayed on bus countdown signs and the London Underground.

Although air pollution episodes have become less frequent, an air quality report published last year noted that between 2018 and 2023, London saw 19 high pollution alerts and 217 moderate alerts, helping to raise awareness and encourage action.

Professor Tobias Rüttenauer of University College London told City News pollution can increase due to many factors.

“The weather conditions are important, which we can’t do anything about. On the other hand what is playing a big role is the emissions within the city. So that’s household combustion, that’s heating – like burning wood in fireplaces and traffic of course. Therefore, schemes like the ultra-low emission zone and low traffic zones will help reduce air pollution levels.”

Tobias Rüttenauer