Freezing temperatures and thick fog in parts of Suffolk and Essex are making for hazardous driving conditions this morning.

Drivers are being advised to allow extra time for journeys after dense fog formed overnight reduced visibility to as little as 100 metres.

Sub-zero temperatures in many parts of the region have also left roads icy.

Forecasters for Weatherquest reported temperatures of -2C in Mildenhall and Thetford. The Met Office described the temperatures as a “topsy-turvy” – with parts of Scotland reaching a “balmy” 15C while England saw lows of -3C.

It issued a yellow weather warning for fog yesterday, from 8pm until noon today, affecting much of southern England.

The warning said: “With light winds and clear skies fog is expected to form quite widely on Monday evening with visibility falling below 100m in places.

“Given the time of year only a slow improvement to conditions is expected on Tuesday morning though cloud arriving from the west may help lift the fog here. Some patches of fog may persist in southern and eastern parts of England throughout the morning.”

Weatherquest said the fog will clear this morning with some bright spells before thicker cloud spreads across the region.

Suffolk police said there had been no major road accidents overnight.