The Met Office has issued further yellow warnings for snow and ice across the UK after parts of the country saw the mercury plunge to -17C overnight.
Earlier today, a yellow snow and ice warning covering northern Scotland and north-east England was extended until noon on Friday.
Across the Shetland archipelago in Scotland, there is also a separate warning for wind, with blustery wintry showers continuing.
Snow and ice warnings are also in place in the South West from 6pm on Tuesday until 10am Wednesday.
An ice warning is in force across parts of Northern Ireland, including Belfast and Londonderry, until noon on Wednesday.
Braemer, in Aberdeenshire, was the coldest place in the UK on Tuesday night, recording a low of minus 17.3C, breaking Monday's record of minus 15.7C.
The next coldest temperature on Tuesday night was also recorded in Aberdeenshire, at minus 14.9C in Balmoral.
Scores of schools across the country have been forced to close for a second day due to the cold weather.
Councils from Aberdeenshire to Cambridgeshire reported school closures, for reasons including heating failure, burst pipes and snow and ice.
The RAC experienced its biggest day for breakdowns on record, with around 12,000 drivers needing help.
RAC Breakdown's Rod Dennis said: "Yesterday was officially our busiest day for breakdowns on record, with around 12,000 drivers needing help, the equivalent of eight every minute of the day.
"Even our busiest day during the infamous Beast from the East in 2018 didn't see as many people breaking down.
"We believe two key ingredients have combined to create the worst-ever winter breakdown cocktail - a sustained period of cold weather with an absence of widespread snow that would otherwise keep people indoors, and a big rise in the number of drivers who can't afford to maintain their vehicles as well as they'd like to due to the pandemic and the cost-of-living crisis.
"Today remains an incredibly demanding day for our patrols, with the rail strikes likely to force yet more people onto the roads."
Travel disruption also continued on Tuesday, with icy roads making conditions difficult.
The Met Office said there will be icy stretches on untreated roads, pavements, and cycle paths due to the thawing of snow left over from Monday.
Forecasters added Arctic air will maintain cold conditions across the UK for most of this week.
But as Atlantic air returns from the southwest this week, there will be a change to milder temperatures.
UK 5 day weather forecast
This Evening and Tonight:
Occasional rain, sleet and snow across southwest England at times. Elsewhere, clear spells, but further snow showers affecting northern Scotland and northeast England. A few freezing fog patches in central areas and a widespread frost, locally severe over snow cover.
Wednesday:
Rain, sleet and snow across the southwest probably pulling away to the south. Otherwise sunny spells and wintry showers, mainly in coastal areas. Windy in places, accentuating the cold feel.
Outlook for Thursday to Saturday:
Remaining very cold for most, with further wintry showers, along with sharp overnight frosts and a risk of ice. Some wetter weather affecting northwestern areas on Friday and Saturday.
