Dense fog warning threatens further travel disruption across England and Wales

A Met Office yellow warning for dense fog is in force across parts of England and eastern Wales until 10am on Tuesday, with visibility potentially falling below 100 metres and further travel disruption possible.

The warning covers the Midlands, East Anglia, the northern Home Counties, Yorkshire and the Humber, parts of Cheshire, and north-eastern counties of Wales. It began at 6pm on Monday. The Met Office says visibility of 50 metres or less can cause severe disruption.

The warning comes after 40 flights were cancelled at Heathrow on Monday before the fog cleared, according to BBC Weather. Fog also caused serious road crashes in Kent and Hampshire on Saturday. The fog-related 30-car pile-up on the M20 left two people seriously injured, the BBC report says.

The fog is expected to lift gradually through Tuesday morning, although dense patches could linger for much of the day. The BBC reports that visibility could fall below 100 metres in places and that patchy fog may form beyond the warning area.

The Met Office advises drivers to check road conditions, use fog lights when visibility is seriously reduced and allow extra time. The RAC recommends leaving more stopping distance. Travellers using public transport or flying should check for updates from their operator; fog can delay flights because aircraft need greater spacing when landing.

A previous fog warning across England and Wales was reported on Monday, as disruption continued into a second day this week.