Brits have been warned to prepare for hazardous conditions as heavy snow and ice are forecast with the big freeze to last until Wednesday.
The Met Office said a band of snow will move into south-west England and Wales in the early hours of Sunday morning, spreading to the East Midlands and south-east England later in the day.
Cold air from Iceland and the Arctic is moving in with yellow warnings for snow and ice in place for Wales, large parts of the West Midlands and the South West until 9pm tonight.
Snow and ice warnings are also in place for western Scotland until 11am and some areas in Northern Ireland until 3pm.
Further heavy rainfall, which caused severe flooding in the wake of Storm Christoph, is not forecast until next Wednesday – but plummeting temperatures are expected.
Temperatures across the whole of the UK dropped below freezing overnight, with the coldest temperatures in the Scottish Highlands forecast at an icy -10C.
Elsewhere, London and Manchester shivered in -3C temperatures overnight as Bristol, Belfast and Glasgow dropped to -2C.
Frosts are expected overnight on Sunday, Monday and Tuesday.
Martin Bowles, meteorologist at the Met Office, said: “The biggest hazard over the next couple of days is going to be ice because we’re getting these snow showers which will all freeze overnight.
“Obviously roads tend to be quite well gritted, especially main roads, but I would warn people to be careful on pavements, minor roads that don’t get gritted or city roads.”
Mr Bowles said the cold spell would continue until about Wednesday before being replaced with milder temperatures in the final days of the month.
“That’s not to say that that’s the end of all cold weather for winter, it isn’t, we’ve just got a mild spell coming up,” he said.
UK 5 day weather forecast
Area of sleet and snow southeast Northern Ireland, Wales and southwest England moving east into the Midlands and the south and southeast of England. Sunny spells elsewhere but also wintry showers. Frost early and late. Windy in the far southwest.
Sleet and snow in the south dying out, to leave clear spells. Wintry showers will continue in the north and west. Icy patches forming along with a locally severe frost.
Rather cloudy with wintry showers across the north and northwest. Mostly dry and sunny elsewhere. Staying cold with icy patches and frost early and late. Windy across the northeast.
Outlook for Tuesday to Thursday:
Fine, dry and cold initially with a few wintry showers in far north-east. Gradually turning more unsettled from the south-west, with cloud, wind, and outbreaks of rain and hill snow.
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