Fresh snow has fallen across large parts of England, causing a major airport to close its runway and further disruption to schools and roads.
All flights at Gatwick Airport have been halted following snow showers overnight.
Up to 15cm (6ins) of snow fell in some areas of England and more showers are expected throughout the day.
Met Office heavy snow warnings remain for the East Midlands, Yorkshire and Humber and the North East.
There are risks of drifting snow in London, the South East and the East.
Widespread ice is causing problems on roads across the whole of England.
Many schools have already announced they will shut on Wednesday as temperatures struggle to get above 0C.
Met Office forecaster David Price said: “It will remain bitterly cold today with the strong north-easterly winds continuing to bring snow showers and making temperatures feel as low as minus six or seven degrees.”
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He said the snowy conditions would continue on Thursday but Friday should see a reprieve, with more snow on the way over the weekend.
Gatwick Airport spokeswoman Sarah Baranowski said the runway was closed at 2230 GMT on Tuesday.
She said ground staff had worked working throughout the night but had not been able to clear the settling snow.
“It is vital that passengers do not make their way to the airport and check our website and with their airline for updates,” she said.
“We need to make sure the runway is safe before all flights can recommence but the snow has not stopped all night.”
Travel disruption:
In Kent, there are significant delays on the M25, A2 and A282 Dartford river crossing. There are at least 100 lorries stranded on the M25 at junction 2In Surrey, police are warning people in the Reigate and Leatherhead area not to travel, particularly not on the M25In South Yorkshire, bus services have been cancelled in Sheffield, Rotherham and DoncasterThere are no trains between Victoria and Dartford, Charing Cross and Hastings and between Strood and Paddock WoodNo flights in or out of Gatwick Airport and delays at London City airportDurham Tees Valley Airport is closed but is expected to reopen at 0900 GMT
Overnight, Southeastern said that at least three of its trains were stuck for about five hours due to problems with ice and snow.
About 60 passengers were affected when the night trains travelling from London to Kent became stuck in the Orpington and Sevenoaks area.
The UK has been experiencing the earliest widespread snowfall since 1993.
The unusual weather is being caused by high pressure over Greenland and low pressure in the Baltic states, forcing cold winds from the north-east across Europe.
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