Motorists have been warned to expect difficult driving conditions as icy weather continues to grip the UK.
The Met Office has issued yellow 'be aware' warnings for ice across the entire country and snow across the Midlands, northern England and Wales, Scotland and Northern Ireland.
With temperatures remaining low overnight, forecasters have warned that ice is likely to form on untreated road surfaces and more snow is expected on high ground, especially across Scotland.
Strong winds of up to 60mph are predicted in north-west Scotland, meaning blizzard conditions are likely, experts say.
There is the potential for disruption throughout this period due to the accumulating snow and ice but also with temporary blizzard conditions leading to very difficult driving conditions."
The Met Office said sleet and snow showers would affect parts of Scotland and Northern Ireland today, with snow falling to lower levels and extending further south through the day.
A man is in a critical condition after he was shot in the head at a fast food restaurant in Northern Ireland, police said.
The attack took place on the Oldpark Road in North Belfast at around 5.40pm.
A vehicle matching the description of the suspected getaway car was found on fire a short distance away, according to the Police Service of Northern Ireland (PSNI).
Inspector James Murphy said: "A report was made to police at around 5.40pm that a man had received a suspected gunshot wound to his head in the vicinity of the fast food takeaway.
"The injured man is currently in hospital being treated for his wounds and has been described as being in a critical condition."
The coldest place in the UK was Tulloch Bridge in Inverness-shire on Thursday - where temperatures fell to -11C, according to weather company Meteogroup.
It comes as a yellow warning of ice remained in place across most of the UK from the Met Office.
It warned icy stretches are likely on Friday evening, overnight and into Saturday morning.
Up to 40 flights have been cancelled at Manchester Airport today, with passengers advised to check with airlines for delays.
It comes after the airport attempts to return to normal service after heavy snow led it to temporary suspend flights on Thursday.
Manchester Airport said the majority of cancelled flights today were on domestic routes such as London Heathrow and Aberdeen.
Britons are preparing for fresh disruption today as more snow and ice hits the country.
Forecasters have warned that ice poses a major hazard today, with the threat of more snow storms still looming.
Helen Roberts, a forecaster at the Met Office, said she is expecting transport problems with ice the "main hazard".
The Highways Agency said its gritters will be out overnight to prepare against icy roads.
There is a snow and ice warning in force for much of the UK tomorrow, but temperatures will be slightly higher than today.Read the full story ›
The cold weather is set to continue over the next few days with further wintry showers and icy patches, particularly at night.Read the full story ›
An energy firm has apologised to customers who received automated phone calls in the middle of the night to warn them bad weather was on the way.
Electricity North West scheduled the calls to people on its 'priority services register' yesterday afternoon, but a technical fault meant some were not received until the early hours of today.
A spokeswoman for Electricity North West said:
We sincerely apologise for the text messages and calls that customers received during the night. We can reassure people that we will not be sending any further messages out until we have resolved this issue
A driver had a lucky escape as his car skidded in icy conditions and ended up nose down at basement level.Read the full story ›
The snow has created some picturesque scenes across northern England today - as well as creating difficult conditions for anyone taking to the roads.
These helicopter aerials between Leeds and Manchester show villages and fields transformed, and those making the best of a day off school.