There was an air pollution alert today 14th January in London.
The forecast for 14th January was for a rare episode of very high pollution ranked ten out of ten for potential harm, the first such incident since March 2018.
There is currently a high pressure over UK, with litte or no wind resulting in air pollution staying local.
The official government health advice was that people with lung or heart problems should avoid strenuous physical activity while healthy people should reduce physical exection, particulary outdoors.
Here are a couple of views of London that show it.
This is how the Evening Standard reported it.
The below shows how the central London air pollution reached out to Hillingdon.
