Weather forecasters are warning of more snowfall in parts of England and Scotland, as Britons continue to shiver in below-freezing temperatures.
Overnight temperatures dropped to -6C in many parts of the country, from central Scotland through to Cumbria and Buckinghamshire.
Many areas will see up to 3cm of snow, while 15cm is predicted to fall in the Scottish mountains.
Sky News weather producer Jo Wheeler said there would be "significant snowfall" in the Scottish mountains and the Pennines later.
She said: "There is also the possibility of seeing between 1cm and 3cm of rain, even at lower levels for parts of the East and North East."
Edinburgh, the Pennines, the Peak District, County Durham, Yorkshire, Norfolk and East Anglia are all expected to be affected.
The Met Office has issued a low-level severe weather warning across most of Scotland, north and east England, and north Wales, because of the freezing temperatures and snowfall.
"Following showers of rain, sleet and snow on Saturday, ice is expected to form on untreated surfaces on Saturday evening and persist well into Sunday morning. Further wintry showers are likely to affect eastern coastal counties through the night.
"The public should be aware of possible disruption to travel."
The Met Office believes the freezing temperatures will last into next week, possibly followed by more snow.
The white start to the month has been enough to prompt record numbers of punters to place bets on snow falling on Christmas Day.
According to bookmakers Ladbrokes, more money had been staked on a white Christmas on Saturday than by any other December 1 in its history.