Sub-zero temperatures have left the south shivering this morning.

Frost is covering much of Sussex as the temperature dropped as low as -3°C last night and parts are shrouded in mist and freezing fog.

However, the county is still free of snow, unlike other parts of the UK.

Once any mist has faded, today is forecast to be sunny and clear, with a high temperature of just under 5°C.

Tonight will see them fall back to just below freezing, but remaining clear and cloudless. Frost will soon return during the evening, and a dry night will follow with some good clear spells, but with the risk of mist or freezing fog patches. The minimum temperature will be -4°C.

Motorists are being urged to check the weather forecasts and travel conditions and leave plenty of time before setting out on their journeys.

They should also take care while driving on icy roads.

A Department for Transport spokesman said: "As winter weather grips some areas of the country we would advise people intending to travel to check weather and local conditions before they set out.

"The Highways Agency and local highway authorities across the country are working hard to ensure disruption is kept to a minimum.

Meanwhile neighbours and relatives are encouraged to check on elderly and vulnerable people to ensure they are safe and well, warm enough and have sufficient stocks of food and medicine.

The elderly are advised to only venture outside if vitally necessary and to wear layers, as well as a hat, gloves or mittens, a coat, and a scarf.