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.
Forecasters have predicted ice and snow which could lead hard driving conditions and disruption to transport services.
A similar warning is in place for north-west England, south-west England, Wales, Yorkshire and The Humber.
Friday will be cold and cloudy with a further possibility of more light snow, according to the Met Office.
Central England and Wales could bear the brunt of the snow on Thursday afternoon and into the evening as wet weather coming through the south-west England turns wintry, with some places seeing up to 4in of snow.
"Things may change as we approach the event".
The bitterly cold temperatures were set to continue with similar temperatures in Scotland, but Northern Ireland on Thursday night.
The ice and fog warning is valid until 11am on Thursday.
Southeastern warned some peak services will be busier while train times will be different, spelling potential disruption for passengers on their ways to work tomorrow. The highest snowfall accumulations are likely to be in areas above 150 metres.
The Exeter-based meteorology centre has also issued a 24-hour yellow weather warning for snow and ice from 1pm today for Exeter and East Devon.
- Possible delays or cancellations to rail and air travel.