On Friday night, temperatures plunged to -6.6C in Sennybridge, near Brecon in South Wales, and -6.5C in Shap, a village near Penrith in Cumbria.
The UKHSA issued the first yellow cold health alerts of the season earlier this week for the West Midlands and the North West, and they remained in place until noon on Saturday.
Looking at the medium range forecast from Sunday, Met Office Deputy Chief Forecaster Steven Keates said: “The outlook is changeable with spells of rain, sleet and some hill snow.
“On Sunday, low pressure will bring rain or showers to many areas. Precipitation will be most persistent across northern Scotland, where there is an increasing chance of snow developing later in the day.
“This will mainly fall over high ground, where accumulations are likely, but some snow could fall to lower levels too. Ice may also become a hazard.”
Into next week, unsettled and cold conditions remain, with rain, sleet and (mainly hill) snow as key features.