Britain has been told to brace for more snow before the cold snap ends as the Met Office issued fresh weather warnings.
The yellow alerts for snow and ice cover Friday, Saturday and Sunday.
The most widespread disruption is expected on Sunday, with a snow and ice warning covering all of Scotland and as far south as Sheffield, and an ice warning covering all of England and Wales apart from the south-western most part of England.
The ice warning is in force from 3am to 2pm and the snow and ice warning is in force from 7am to 9pm.
The warning includes:
- Possible travel delays on roads stranding some vehicles and passengers, along with delayed or cancelled rail and air travel.
- Some rural communities could become cut off
- Power cuts may occur, with the potential to affect other services, such as mobile phone coverage
- A chance of injuries from slips and falls on icy surfaces
A number of other snow and ice warnings are in force on Friday and Saturday, covering Scotland and the western-most part of Wales.
The cold snap, in pictures
Snow causes chaos in Scotland
Heavy snow has disrupted travel and led to school closures as wintry conditions sweep Scotland.
Much of mainland Scotland is covered by a Met Office yellow warning for snow and ice, while an amber alert for snow in the central belt expired at midday on Friday.
Police Scotland has issued a travel warning for the whole of Scotland advising people to travel with caution, with snowy conditions affecting many roads.
Air passengers were also affected as the runway at Glasgow Airport was closed during the morning while snow and ice was cleared. It reopened at around 11.30am.
Many schools around the country were shut due to the weather, including some in Aberdeenshire, the Highlands and Perth and Kinross.
In Shetland, engineers have been working to reconnect thousands of homes which lost power on Monday afternoon as heavy snow brought down lines.
Traffic Scotland said on Friday morning that snow was affecting many major trunk roads and urged people to drive with care.
The yellow warning of snow and ice on the mainland is in force until 9pm on Friday, while a yellow warning of ice has been issued for much of central and southern Scotland, north east and north west England, the East and West Midlands, Yorkshire and the Humber and Wales from 9pm on Friday until mid-morning on Saturday.
Scottish and Southern Electricity Networks (SSEN) Distribution said that as of 1pm on Friday, around 1,600 properties remained without power in parts of Voe, Brae and West Mainland in Shetland.
Following the arrival of additional crews and equipment, around 150 engineers are now battling snow and ice to rebuild overhead power lines and reconnect properties to the network.
Mark Macdonald, head of region at SSEN Distribution, said: "Teams of engineers have been out in force since first light this morning to continue restoring power to homes and businesses across Shetland."
SSEN said it expects to continue making progress over the next 48 hours and is targeting the restoration of the large majority of supplies by Sunday.
However it is anticipated that some small clusters of properties in the West Mainland, particularly west of Bixter, will be reconnected on Monday.
Keith Brown, the Scottish minister for resilience, visited Shetland on Thursday to chair a resilience meeting with members of the community and energy firm bosses.
He said: "The situation in the west of Shetland remains extremely difficult for many people and businesses without power.
"Everyone is mucking in and helping each other, from making food and keeping each other's spirits up, to checking on vulnerable members of the community. It really is quite extraordinary."
