Flooding is expected and travel disruption is likely due to difficult weather conditions in southern England.

Flights could be cancelled and journeys delayed because of “freezing” fog in the region, the Met Office said.

Commuters were asked to prepare for longer journey times due to possible delays to bus and train services.

“There is a chance of delays or cancellations to flights,” the Met Office added.

Potentially difficult driving conditions were likely due to the combination of reduced visibility and untreated surfaces turning icy.

The Met Office said residents and commuters in Bracknell Forest, Buckinghamshire, Hampshire, Oxfordshire, Reading, Slough, Southampton, Surrey, West Berkshire, West Sussex, Windsor and Maidenhead and Wokingham would need to be mindful of the conditions.

The fog was also due to hit Bath and North East Somerset, Bournemouth, Christchurch, Poole, Devon, Dorset, Somerset, South Gloucestershire, Swindon and Wiltshire.

Unusual weather has “flipped the norm” and left parts of northern Scotland enjoying warmer temperatures than southern England, the Met Office has said.

An overnight low of minus 8.6C was recorded in Benson on Monday, with Altnaharra in northern Scotland a comparatively balmy 10.6C.