The cold snap hit Britain in earnest as snow storms were brewing over the North Sea.
Wintry weather moving in from the east will bring freezing temperatures, biting winds and snow to the eastern half of the UK by Sunday night, forecasters said.
People were warned to wrap up warm and expect disruption on the roads during the big freeze, which heralds the start of February during the coldest winter for 13 years.
Stephen Davenport, of MeteoGroup, the weather division of the Press Association, said temperatures would barely get above freezing, with icy winds making it feel even colder.
"There are snow storms growing over the North Sea that will hit the eastern half of the UK on Sunday night. The maximum temperatures will barely get above freezing and in some places it will feel several degrees below because of wind chill."
He said up to 10cm of snow could fall in places, with Lincolnshire and Yorkshire likely to be worst affected.
"There will also be drifting because of the strong winds," he added.
The winds, which will generally be around 25-30mph, could get close to gale force in some places on Sunday night, according to forecasts.
The AA have warned motorists to ensure they keep warm clothes in the car after dealing with unprepared drivers "flirting with hypothermia" at breakdowns during the last big freeze.
AA Patrol of the Year Andy Taylor said: "People often treat their car as an overcoat.