Pedestrians walk through fog as they cross the Millennium Bridge/ AFP PHOTO / Daniel LEAL-OLIVAS

Agency Report

A thick fog in London is reported to have forced the cancellation of around 100 flights at Heathrow Airport on Monday, thereby reviving concern about air quality in the capital.

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“Foggy weather across the South East has reduced visibility at Heathrow,” the airport said in a statement.

The statement added that the cancellations amounted to around eight percent of scheduled flights.

There were also dozens of cancellations at London City Airport and road users were warned about driving conditions after freezing temperatures overnight.

A map from Britain’s environment ministry showed “very high” pollution across southeastern England on Monday.

“Reduce physical exertion, particularly outdoors, especially if you experience symptoms such as cough or sore throat,” the ministry’s advice read.