Thick fog forced cancellations at Heathrow and London City airports on Monday morning, with visibility dropping as low as 50 metres in some areas. By 6.30am, seven flights from Heathrow and three from London City had been cancelled.

A yellow weather warning was in place until 11am, with the Met Office warning that fog could be stubborn to clear where temperatures remained low even after the warning expires.

The fog disrupted morning travel, with Heathrow and London City being among the worst affected. The Met Office explained that the combination of clear skies, light winds, and prolonged cooling overnight had created the 'perfect recipe' for fog to develop.

A serious motorway collision involving over 30 vehicles occurred on the M20 near Maidstone between junctions eight and nine earlier in the week. The motorway was closed for almost 12 hours following the incident.

Drivers have been advised to avoid relying on the rear lights of vehicles ahead and to drive to what they can actually see. The disruption serves as a reminder of the vulnerability of transport networks to sudden weather changes, particularly in the autumn and winter months.