One of the UK's busiest airports was forced to close on Thursday, as 'thundersnow' storms wrought havoc for commuters across roads, runways and rail-lines, and saw 300 schools close.
And the country is braced for more disruption as further sleet and snow is on the way. Forecasters warn that ice is the biggest danger overnight as snow which has fallen freezes over, with the Highways Agency gritter fleet out in force.
Northern England, Scotland and Northern Ireland were worst hit, with up to 9inches (23cm) of snow falling in some parts.
Sleet and snow storms are likely to strike again on Friday, while a fierce Arctic blast is expected to sweep the country on Saturday and Sunday - bringing snow across the North, and down the south west and east coasts of England and East Anglia.
UK winter weather
UK winter weather
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Cars make their way through the snow in the Loxley area of Sheffield
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A cyclist makes his way through a blizzard in Durham
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Heavy snow falls on the A690 into Durham
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Picture of snow taken through a window of a plane stuck at Manchester Airport
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A woman walks in heavy snow in the Loxley area of Sheffield
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Heavy snow in the Loxley area of Sheffield
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A snow covered Durham Cathedral
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Snow covered graves at St Joseph's Church in west Belfast, as an orange weather alert is announced in Northern Ireland
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Sheep in snow, in the Glens of Antrim, as an orange weather alert is announced in Northern Ireland
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Snow Blizzards on the A9 road near Blackford, Perthshire as snow blizzards sweep across the country
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A cyclist on Dumbarton Road in Stirling during a snow blizzard
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A dog walker walks through the Kings Knot area below Stirling Castle during a snow blizzard
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Vehicles driving down Dumbarton Road in Stirling during a snow blizzard
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Scotrail train travels through snow covered country side near Lenzie, Scotland
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A man digs his car out of the snow near Shaw, northern England
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A dog walker in the snow on the Pennine hilltops near Reeth in the Yorkshire Dales, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
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A snow plough on the A93 near Guildtown, as snow brings fresh disruption to parts of the UK
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Andrew Millington (left) and Stephen Peacock walk near the Spittal of Glenshee as snow brings fresh disruption to parts of the UK
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Snow covers the A68 near Corbridge in Northumberland, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
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A car makes its way through snowfall in Gortin near Omagh, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
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Sleaford Lincolnshire in the snow Boxing Day 2014
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Snow at Liverpool's John Lennon Airport, which closed temporarily on Friday night
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Maisy Byrne, aged nine, (left) and sister Lulu Byrne, aged seven, have fun as snow falls on Boxing Day in Gateacre, Liverpool
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A decorative snowman surrounded by real snow outside a house in Eccleston Park, near Prescot, Merseyside
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Maisy Byrne, 9, left, and sister Lulu Byrne, 7, have fun as snow falls in Gateacre, Liverpool
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Snowfall in Uttoxeter, Staffordshire on Boxing Day
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A man pushing a motorcycle through snow in Newtown Linford, Leicestershire on Boxing Day
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On the M6 near Sandbach
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Snow swirling around the grounds of Lichfield Cathedral on Boxing Day
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Referee Mark Clattenburg during the Premier League football match between Manchester City and West Bromwich Albion at The Hawthorns in the Midlands
Helen Roberts, a forecaster at the Met Office, said:"We could see some more sleet and snow coming in from the North West, the remnants of it could clip the South East and as far south as London."
"The strength of the wind is making things feel extremely raw, she added.
Earlier today, all flights in and out of Manchester Airport were suspended following heavy snow. The airport reopened shortly before 2pm but passengers were warned to expect further delays.
The Met Office has said that "thundersnow" storms, which are thunderstorms with snow rather than rain, were occurring to the north of Manchester.
Flights were also suspended at East Midlands Airport near Nottingham, after a bout of heavy snowfall.
Fortunately, an amber "be prepared" snow warning for northern England has been downgraded to yellow by the forecaster, but knock-on effects are expected to continue.
The travel chaos took hold across roads and rail networks too, with more than a dozen rail services between Manchester and York cancelled due to the severe weather, while the Highways Agency warned drivers of the heavy snow as the main roads in Durham and Yorkshire were closed.
In Scotland and Northern Ireland, heavy snowfall saw more than 130 school closures in each nation, while a total of 34 schools were closed in Cumbria, where 13cm of snow fell overnight. In Oldham, Greater Manchester, 20 schools were among the dozens more closed across the north of England.
Northern parts of the UK were worst hit. Tulloch Bridge in Inverness-shire had 9in (23cm) of snow, while there was 8in (21cm ) at Glenanne in Armagh and Spadeadam in Cumbria had 5in (13cm).
In Sheffield, where bus services have been severely affected, the City Council said as much as 33cm - almost 1ft - of snow fell has accumulated since last night. In an effort to keep networks in the city running, teams have been gritting roads since 6pm on Wednesday.
Councilor Janye Dunne, the council's cabinet member for environment, recycling and streetscene said 1500 tonnes of salt has been put on the network so far, the weight equivalent of 188 double decker buses.
Between five and 10 cm of snow is expected to fall above 200m in the north of England early on Thursday night with temperatures dropping to between 2 and 3 degrees Celsius in the north and between 4 and 5 Celsius in the south.
Public Health England has urged people to take extra care during the severe weather.
Head of Extreme Events Dr Angie Bone advised people who need to travel outside to wear lots of thin layers and shoes with a slip resistant grip, while those at home should "maintain indoor temperatures to at least 18 degrees Celsius, particularly if you are not mobile, have a long term illness or are over 65".
The disruption was so severe on Thursday that Prime Minister David Cameron announced on Twitter that he has asked for updates on the weather and measures taken to keep transport systems and energy supplies running.
He tweeted: "I have asked for an update on our heavy snow contingency plans. The gritters are out and people should listen to warnings."
Network provider EE has warned its business customers of a risk of "degraded coverage" as the severe weather passes through the north of England and Scotland.
In a statement on Twitter, East Midlands Airport airport said: "We have suspended runway operations until 1500. The snowfall has started to ease so we are hoping to be back up and running ASAP."
Passengers due to fly from Manchester Airport are now being asked to travel to the airport as normal but are being advised to check with the airlines they are flying with for further information.
Manchester Airport said: “Following the poor weather experienced this morning, flights have now resumed but are subject to delays.
”The safety and security of our passengers is paramount and we continue to make significant efforts to clear snow from other parts of the airfield.
“Further periods of poor weather are forecast for the rest of the day, and we would ask all passengers to contact their airline before travelling to Manchester Airport.”
Earlier this morning the airport had been open and a "handful" of planes had been forced to circle while one of the two landing runways was cleared of snow.
The operation to de-ice and clear the snow began at 7am and the airport's snow team was due to switch to clear the other runway so that the "flow rate" of landings would be reduced.
Additional reporting by PAReuse content