Severe weather warnings have been put in place across the UK as the country falls into the grip of another cold snap.
Sleet and snow is expected in higher areas and drivers have been told to watch out for icy conditions.
Temperatures plummeted to sub-zero numbers overnight on Monday and will barely rise above freezing during the day.
Overnight temperatures on Wednesday may drop to as low as -6C.
Yellow warnings - the Met Office's second highest alert - are in place from the Shetlands to the south coast of Kent, mostly on the eastern side of the UK.
Northern Ireland and Cornwall are also on alert.
"Scattered light sleet and snow showers together with freezing temperatures will increase the risk of icy patches forming, especially on untreated surfaces," the Met Office said.
"The public are advised to be aware that extra care is needed, especially when travelling."
This year's winter has been mild in comparison with last year, when harsh weather caused chaos around the UK, closing roads and airports.