Ice warnings are in place for much of Britain as the freezing cold weather conditions and snow continues to bring chaos to the roads and railways.
Drivers in snow-hit areas across the UK have been urged to postpone their journeys if possible, while train journeys have also been severely affected with services delayed or cancelled.
The AA has has said its patrols have faced a "winter war zone" - attending more than 1,100 call-outs to people either stuck in snow, ice or flood water since Thursday.
Huge snowdrifts - up to 15ft deep in some places - and abandoned vehicles are preventing energy companies from reaching some areas to restore power.
A man walks along a snow drenched road in Leeds, Yorkshire
Power has been restored to all 1,700 homes in Cumbria - but several thousands are still without electricity in other parts and many roads remain impassable with no end in sight to the severe weather gripping the UK.
Helicopters are being used to get engineers to affected properties in rural and exposed part of Northern Ireland.
Businesses have also suffered, while farmers - yet to recover from the disastrously sodden summer of 2012 - have said the Arctic weather has come at the worst possible time.
A motorist drives past snow covered trees near Dundrod in County Antrim
Blizzard conditions are claiming the lives of newborn lambs, affecting spring crops and forcing families to work all hours to try to keep stranded stock alive, according to the National Union of Farmers (NFU).
And the severe weather and bitterly cold temperatures are set to continue across most parts of the country right up until the weekend, forecasters have said.
This could mean the first white Easter in five years, as the nation enters British summertime.
The Met Office - which has extended its level 3 cold weather alert until Friday - has said there is a 90% chance the unseasonal cold snap will continue to keep large parts of Britain frozen for the rest of the week.
Farmer Roy Kerby feeds sheep after snowfall in Etwall, central England
Bitterly cold easterly winds will persist in the days to come, bringing snow showers to northeast England and light snow flurries across other parts.
It is a marked contrast to the warm spring weather the nation enjoyed this time last year.
On March 24, 2012, sun-seekers flocked to Brighton to bask in the sunshine and 18C (64.4F) heat. In comparison, the beach was deserted on Sunday with the temperature at just 2C (35.6F).
Some reports suggest Britain could be hit with a similar heatwave towards the end of spring.
But according to Sky News Weather Producer Jo Robinson: "Spring is a changeable season, with extremes possible. There's no evidence to suggest that a cold snap at the end of March means there will be a heatwave in April."
An abandoned car on the side of the road in the Briercliffe area of Burnley
A yellow warning - meaning be prepared for bad weather - is in place for north-east England, Scotland and Northern Ireland.
But it is the ice that is causing the biggest concern, with large parts of the country being warned about the danger of black ice as commuters wrestle with journeys on foot, by car or public transport to work and back.
"Lying snow in many areas will melt on roads and pavements by day, refreezing by night to give icy patches," a Met Office spokesman said.
"Snow blowing off fields in strong to gale force winds will also affect some roads, especially over high ground."
Brighton beach - this time last year compared to this weekend
In northern England, many cross-Pennine routes remain blocked by drifting snow, including the Snake Pass and Woodhead Pass, between Manchester and South Yorkshire.
Gritting teams in Sheffield said they have experienced drifts in excess of five metres (16ft 4ins) to the north and west of the city.
The Department for Transport has warned motorists to take precautions and only set off from home if they have checked the latest travel conditions.
A spokesman said: "The unseasonal weather is affecting transport networks. Our staff and other transport operators are working tirelessly around the clock to keep roads open, and keep other services running."
People clearing the road to access their homes in the village of Cargan
Sky's Mike McCarthy, in Buxton, Derbyshire, said: "What is happening is these bitterly cold easterly winds are making the snow drift over the roads, even when it has been cleared by the snow ploughs and gritters.
"We've seen a number of people struggling with the weather, some abandoned cars still, and in other parts of the country, Cumbria for example, they are saying 'don't return to your abandoned car just yet - contact the police first', because the conditions are still very severe."
The electricity grid has been hit by the wintry conditions over the past few days. Ice has packed onto power lines, causing them to buckle under the weight.
Engineers have been working to restore supplies to around 7,000 homes in Northern Ireland and 10,000 in Scotland, as well as 500 properties on the Isle of Man.
A snow covered narrow boat sits in a frozen canal in Birmingham
Some 3,500 people are cut off in Kintyre and 1,500 are without electricity on the Isle of Arran. The Caledonian MacBrayne ferry between the mainland and Arran was laden with engineering support to be deployed in the Island.
Sky's Scotland Correspondent, James Matthews, said: "Lorries carried generators and fresh telegraph poles. There was also a small fleet of outdoor catering vans which had been drafted off duty at commercial public events to come and supply islanders running short of supplies."
Emergency oxygen supplies had to be airlifted to an elderly man trapped by heavy snow in Northern Ireland.
Those living in remote areas there have been warned it could be days before they have electricity again, but water supply has now been restored to most of the 1,000 homes affected.
A man found dead in deep snow after he started walking home in severe weather has been named by police.
Gary Windle (left) was found dead in deep snow near Burnley
The body of Gary Windle, 25, was found by a farmer in Brierfield, near Burnley, in Lancashire, at around 1.30pm on Saturday.
Police said his death was not being treated as suspicious and there were indications it was a "very tragic incident" after he started walking home from a night out with friends.
On Friday, a woman, named locally as Susan Norman, died when her house in Looe, Cornwall, collapsed during a landslip following torrential rain.
A 57-year-old hill walker, named by police as James Jack, died in the Scottish Highlands, although police said it was not clear whether his death was linked to the poor weather.
Sky News Weather Presenter Nazaneen Ghaffar said the heavy snow had subsided but added: "As we head towards this Easter weekend, it's going to remain unsettled, In fact, on Good Friday, there's the risk of more widespread snow."
Bookmaker Ladbrokes has cut the odds of snow at Easter to 4/5 after taking a flurry of bets in the past 48 hours.
Forecasters have predicted it could be the coldest March in 50 years. In 1962, average temperatures for the month were 2.8C (37F).