The Met Office has issued yellow weather warnings for Thursday and Friday across the UK. All four countries in the United Kingdom set new records for the 2018/2019 winter. The lowest temperature was recorded in Braemar, Aberdeenshire, where the mercury plummeted to -12.9C.
Snow radar LIVE: Snow is currently falling across Ireland (Image: Meteo radar)
2:01am update: NEW SNOW RADAR
Latest snow radar reveals further snow is affecting many central and southern areas.
The Met Office encouraged people to keep updated on the snow and how it may affect their travel.
RADAR: Further snow affecting many central and southern parts (Image: MET OFFICE)
1:23am update: Travel disruption
Drifitng snow is affecting high level routes: A537, A54 and B5470 in Cheshire EAst. The roads are currently being gritted.
Highways England warned snow around the A417 and AirBalloon roundabout has potential for "hazardous" driving conditions.
Meanwhile, Greater Western Railway are expected to have disruptions until around 1pm today.
12:40am update: Lowest temperature recorded in 7 years
As January drew to a close, it was exceptionally cold across Scotland - the lowest temperature recorded in 7 years.
Heavy snow still affecting parts of the south.
12:15am update: Aurora tonight in Scotland!
With clearing skies across northern Scotland it may be possible to see the aurora tonight in between the snow showers
Snow is continuing to affect many southern areas (Image: MET OFFICE)
11:34pm update: LATEST SNOW RADAR
Latest radar is continuing to affect many southern areas, including parts of London.
The Met Office has urged those in the affected areas to stay in touch with their warnings and remain 'weather aware'.
10.48pm update: Coldest temperature since 2012 recorded in Aberdeenshire
Temperatures in Braemar, Aberdeenshire, have dropped to minus 14.5C (5.9F), according to the Met Office.
This is the coldest temperature recorded anywhere in the UK since 2012.
10.45pm update: More than a hundred schools to be closed on Friday in Devon and Cornwall
A spate of school closures numbering more than 100 have been announced for Cornwall and Devon on Friday.
Almost 90 schools in Cornwall will now be closed on Friday, the county council has said, while more than 34 will be shut in Devon.
10.10pm update: A30 drivers still trapped
Some drivers trapped by the heavy snow in Cornwall are back on the move tonight - but not everyone.
Within the last hour, Miranda Dalton, of Cornwall Police, said there were still problems on the A30 but the A38 was starting to clear.
She tweeted: "Still have problems on the A30 at Okehampton and Whiddon Down. A38 at Haldon starting to move .. agencies working hard to clear A30 and Met office state snow should be stopping soon @DC_Police."
Devon & Somerset Fire & Rescue Service said earlier motorists were stuck on the A38 near Haldon Hill and the A380 near Ideford Dip.
9.20pm update: How much snow has fallen?
The Met Office says 12cm snow has fallen on Bodmin Moor in Cornwall.
5cm of snow in Sennybridge, Powys, 8cm in Spadeadam, Cumbria, and 7cm in Tulloch Bridge, Inverness-shire, the forecaster added.
9.05pm update: Reports of snow now falling in the capital
Snowfall is being spotted in London, according to people on social media.
“@d_jooste Got a few flakes of snow in SE London.”
@JohnLoony tweeted: “It's snowing in Croydon! But it's only a very light sprinkling so far, and only tiny flakes. If Cornwall has stolen all the big fluffy stuff before it got as far as London, I'll blame Jeremy Corbyn. #snow”
8.30pm update: Snow is now reaching London
Snow has started falling in London, according to the latest snow maps, although we have not seen any evidence of this yet!
Snow radar LIVE: Snowfall in the UK at 8.20pm (Image: Netweather)
7.50pm update: Heathrow Aiport cancels and merges 'a number of short-haul flights tomorrow'
Heathrow Airport has either cancelled or merged some short-haul flights tomorrow due to the snow.
A spokeswoman told Express.co.uk: "We recognise the uncertainty that the bad weather may be causing customers, and have offered those due to travel on short-haul flights to/from Heathrow the opportunity to postpone their journey.
"Due to the adverse weather conditions predicted, we have been forced to cancel and merge a number of short-haul flights tomorrow to ensure that we protect the rest of our schedule.
"Safety is always our priority, and we're working hard to keep our operation moving. We're sorry that some of our services are being delayed by the weather conditions."
7.15pm update: Help rough sleepers tonight
If you see anyone sleeping rough in tonight's freezing weather in England or Wales, report it to Streetlink.
The details you provide will be sent to the local authority or outreach service for the area to help them find the individual and connect them to support.
6.55pm update: 'Intensive effort' to help stranded Cornwall drivers
An "intensive effort" is under way to help stranded motorists on the A30 in Cornwall, said Chief Inspector Adrian Leisk, head of roads policing across Devon, Cornwall and Dorset.
He tweeted: "For those stuck on the A30 in Cornwall, an intensive effort is under way to clear the carriageways of vehicles to allow the gritters through.
"Please stay with your vehicles and we will get to you."
6.20pm update: Londoners told to finish journeys by 9pm
Londoners have been warned to “complete all journeys by 9pm” due to the snow.
Up to 10cm of snow could hit in parts of the UK tonight, and London is covered in an amber warning for snow
Travel for London said: "IMPORTANT TRAVEL INFO FOR TONIGHT: temperatures are due to drop and there is a likelihood of snow, sleet, ice & windy conditions.
Please try to complete all journeys by 21:00."
Travellers are being advised to take caution on platforms, whether there is snow or not, as they are likely to be slippy.
Snow radar LIVE: The Met Office's latest snow radar for the UK (Image: Met Office/Twitter)
6.15pm: Cornwall Airport has reopened
The airport was shut earlier due to the snow.
5.35pm: Where is it snowing right now?
Snow is now falling in south Wales, Cornwall, Devon, Exeter and Plymouth.
5.15pm: More than 100 vehicles stuck on A30 in Cornwall
Approximately 100 drivers are stuck on the A40 near Temple in Cornwall due to a whiteout, Highways England has said.
The stranded motorists are having to sit in their cars in freezing temperatures while they wait for a snow plough and glitter to clear the way.
Chief Inspector Adrian Leisk, head of roads policing across Devon, Cornwall and Dorset, said around 100 vehicles were stuck on the A30 in Cornwall.
He tweeted: "Significant snowfall in £Cornwall, particularly on the A30 at Temple where around 100 vehicles are currently stuck.
"The snow is heading eastwards and will cause significant disruption tonight. Please be prepared and avoid all but absolutely essential travel."
4.28pm: Cornwall Airport shuts / train service providers warn people to travel home early
Cornwall Airport has shut temporarily because of the snow but is aiming to reopen by 5pm, according to an update on Twitter.
The airport is located near Newquay, where traffic has traffic has ground to a halt because of the snow.
Train operators are urging people to check services before travelling tonight and to make their journeys sooner rather than later.
Great Northern tweeted: "We advise passengers to travel earlier this evening if possible."
4.20pm update: Drivers warned of travel delays
Dan Suri, chief meteorologist at the Met Office, said: "As well as the Amber warning there are still Yellow snow and ice warnings in place for a wider area across southern England and Wales, and for the east of the UK and northern Scotland.
"This snow and ice could be disruptive, causing delays to travel.
"Snow amounts will vary within the warning areas with some places seeing very little."
3.40pm update: Snowy scenes in southwest England
Snow is falling thick and fast in Cornwall causing traffic delays on roads.
Weatherman Liam Dutton tweeted: "Rain has turned to snow over Bodmin Moor in NE Cornwall, up at around 250 metres. Traffic already slow and merging into one lane.
"This will start affecting other routes (particularly over hills and moors), as rain turns to snow in coming hours. #uksnow"
Snow radar LIVE: There is gridlock on the roads in Newquay (Image: @ian_jepson/Twitter)
Snow radar LIVE: Snow is represented in red on the map (Image: Netweather)
3.30pm update: Schools close early in Cornwall and Dorset as snow begins to hit southwest England
Snow has begun to fall in Cornwall and pupils have been let out early so they can get home safely.
Cornwall Council said three schools - Curnow School, Launceston College and