Nearly 5,000 schools have been closed across the UK as snow and icy conditions continue for a fourth day.
Nearly 5,000 schools have been closed across the UK as snow and icy conditions continue for a fourth day.
Travel has also been affected, with disruption to road and train journeys.
Travel has also been affected, with disruption to road and train journeys.
Flights are suspended at East Midlands, Manchester and Leeds Bradford airports, and Heathrow has cancelled one in 10 flights because of poor visibility.
Flights have been suspended at East Midlands and Leeds Bradford airports, and Heathrow has cancelled one in 10 flights because of poor visibility.
Snow is currently falling in northern England and southern and eastern Scotland, where Met Office amber "be prepared" warnings are in force.
Snow is currently falling in northern England and southern and eastern Scotland, where Met Office amber "be prepared" warnings are in force.
Forecasters say they expect 10-20cm (4-8in) of snow could fall during the day and are also warning of ice affecting East Anglia, southern England and south Wales.
Forecasters say they expect 10-20cm (4-8in) of snow could fall during the day and are also warning of ice affecting East Anglia, southern England and south Wales.
In other developments:
Hundreds of schools across England have closed, including about 800 in East Anglia, 500 in the West Midlands, 600 in West Yorkshire, 120 in Northamptonshire and 100 in Surrey. Discussing the closures, the National Association of Head Teachers says heads have a duty of care to pupils
On the rail network, there have been delays on a number of routes into London with Greater Anglia, South West Trains, Southern, Virgin and Southeastern services reporting delays
There are also revised services on the Gatwick Express and Eurostar
The Met Office said in the areas of England and Scotland expecting the heaviest snow on Monday, drifting is likely in strong to gale force easterly winds.
It has also imposed yellow "be aware" snow warnings for much of the eastern side of England and Scotland as well as Northern Ireland, but says falls in these areas should ease during the day.
The forecasters warned sub-zero overnight temperatures would lead to ice forming where snow had fallen or melted during Sunday.
There are particular problems of ice predicted from an area of wet weather due to hit south-west England, bringing rainfall on to frozen ground as it moves across southern England.
Heathrow Airport has reduced its schedule by about 10% - cutting about 130 flights - in anticipation of low visibility. A spokesman said adverse weather conditions at other European airports meant that "further cancellations are inevitable".
Heathrow Airport has reduced its schedule by about 10% - cutting about 130 flights - in anticipation of low visibility. A spokesman said adverse weather conditions at other European airports meant that "further cancellations are inevitable".
Meanwhile, the runway at East Midlands Airport is currently closed due to poor visibility and Robin Hood Airport near Doncaster is also shut because of the weather. At Leeds Bradford airport, flights have been suspended to allow the runway to be cleared of snow.
Meanwhile, the runway at East Midlands Airport is currently closed due to poor visibility and Robin Hood Airport near Doncaster is also shut because of the weather. At Leeds Bradford airport, flights have been suspended to allow the runway to be cleared of snow.
The Highways Agency said main roads should be clear of snow.
In other developments:
Spokesman Jon Caldwell said: "Although we've treated the roads consistently throughout the night, the roads could still have patches of ice, so those people who do have to drive, we're asking them to keep their speed down, keep the distance between themselves and the car in front to avoid any sharp braking."
The Met Office imposed yellow "be aware" snow warnings for much of the eastern side of England and Scotland as well as Northern Ireland, but says falls in these areas should ease during the day.
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He said "hard shoulders and some of the local roads will still be very difficult".
The forecasters warned sub-zero temperatures would lead to ice forming where snow had fallen or melted during Sunday.
On Sunday evening, a number of British Airways flights to Heathrow's terminal five were diverted to other UK airports after BA was unable to de-ice planes on the ground quickly enough to clear the stands.
There are particular problems of ice predicted from an area of wet weather due to hit south-west England, bringing rainfall on to frozen ground as it moves across southern England.
In its latest weather updated, which is valid until 15:00 GMT on Tuesday, the Met Office said persistent snow would continue to affect much of eastern Scotland for the rest of Monday and Tuesday.
It added that snow should become lighter from the south later on Tuesday and winds would begin to subside.
However, it warned that the public should be prepared for the risk of further disruption to travel, and the likelihood of road closures, as well as possible disruption to power supplies.
Meanwhile, the Highways Agency said main roads should be clear of snow.
Later on in the week, the BBC Weather centre forecasts further sleet and snow at times, with widespread frost and ice likely.
Later on in the week, the BBC Weather centre forecasts further sleet and snow at times, with widespread frost and ice likely.
For more information on the weather and transport situation in your area, visit the BBC Weather website and BBC Travel News.
For more information on the weather and transport situation in your area, visit the BBC Weather website and BBC Travel News.
Have you been affected by the snow? Has your travel been disrupted? Are you stuck at an airport in the UK? Please send us your comments and pictures using the form below.
Have you been affected by the snow? Has your travel been disrupted? Are you stuck at an airport in the UK? Please send us your comments and pictures using the form below.
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