A yellow weather warning for snow and ice is in place for much of Hampshire and the South East from 1pm today until 9pm tomorrow.
Braemar in Aberdeenshire was the coldest place in the country as temperatures dipped to -11C (12.2F), 0.2C lower than the previous record for 2019.
Wintry weather could hit during the evening commute as sleet and snow are set to fall across the city this evening.
Police are urging people to stay in their cars to keep warm after around 20 cars were abandoned on Cornwall's A39 dual carriageway amid heavy snow.
The Met Office says there could be 10cms of snow in three hours.
At around 8.15pm on Thursday, the force tweeted: "We have further reports of vehicles stuck on the #A39 in #Cornwall due to snow".
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The Met Office has issued an amber "danger to life" warning for parts of the United Kingdom as icy roads and heavy snow up to 10cm deep is expected to settle a day after the cold snap led to disruption for airports and schools.
The Met Office said: "Showers will develop during Thursday night and continue into Friday morning falling as a mixture of rain, sleet and snow".
South East 4x4 Response, a team of highly skilled volunteers, is preparing to rescue motorists who could become trapped in the snow.
Southeastern Trains said 21 services were being cancelled or altered on Thursday morning to minimise the impact of ice forming on the rails and ensure lines were clear and that it would run its "winter weather timetable".
'The highest snowfall accumulations are likely to be in areas above 150 metres or so'.
Met Office meteorologist Mark Wilson said: "On Thursday it will be generally dry in the north".