One of the worst smogs of the year is set to hit south London this week.

The Met Office has forecast the highest level of air pollution in the capital and southern England on Tuesday and Wednesday.

Today’s level in Croydon is eight out of 10 and could reach 10 out of 10 this week, forecasters warned.

Dust from a Saharan storm, which was brought up to southern England from North Africa, covered cars with dirt last night.

Car owners woke up to find their vehicles covered in a thin layer of dust after showers during Sunday night.

Those with respiratory problems and adults with heart problems are being advised to avoid strenuous exercise during the smog.