SNOW and Ice warnings are in place across the UK with temperatures to plunge as low as -15C.
The warnings come after Britain was battered with torrential rain, with 265 flood alerts across the UK.
The mercury will drop as low as minus 6C overnight in England, with the potential for the mercury to fall to between minus 10C and minus 15C in parts of Scotland, according to the Met Office.
A yellow warning for ice stretching from western Welsh coasts across to London and East Anglia came into force on 8pm on Saturday, and lasts until 11am on Sunday.
On Saturday evening, the Environment Agency had put in place 90 flood warnings across England, alongside 243 less serious flood alerts, after water levels rose across the country throughout the day.
Police in Hertfordshire reported “extensive flooding” affecting a number of properties in Long Marston on Saturday afternoon, after heavy rain fell throughout the day.
Popular beauty site Chesil Beach in Dorset was battered last night during a brutal storm with a car being washed away by giant waves.
Sea and rain water poured thrashed onto streets with at least one person left needing urgent medical attention.
And the Met Office last night warned Brits to wrap up warm ahead of the coldest night of the year so far.
Temperature maps from the weather agency showed the mercury plunging to -15C in rural areas of Northern Scotland, and as low as -6C in the North of England.
The lowest temperature recorded before this was -13C in Dawyck Royal Botanic Gardens in the Scottish Borders, the Met Office said.
The iconic beach was besieged by strong winds, heavy rainfall and terrifying 23ft waves.
As of 11am this morning, a total of 82 flood warnings – and 199 flood alerts – meaning flooding is possible – remained in place across England.
Evesham, in Worcestershire, was battered with heavy rain overnight, causing the River Avon to burst its banks.
The cold snap is reportedly being caused by a “dense pool of cold air” from Scandinavia.
The wintry weather will continue next week after some more settled conditions.
Met Office meteorologist Simon Partridge said: “We’ve got this band of rain sleet and snow that’s moving across much of England and Wales through today. That is a real messy mix.”
He added that conditions are set to get even “more interesting as we go into Tuesday and the middle of the week”.
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He said that a “much heavier” band of rain moving in overnight on Monday would “quickly turn to snow as it bumps up against cold air” on Tuesday.
He said that Wales and the north of England could see “pretty much anywhere” between 1cm and 5cm of snow in low areas and between 5cm and 10cm on higher ground.
He also said that the highest areas of the country could see up to 20cm of snow, meaning there could be some disruption on Trans-Pennine routes.