UK weather and travel - as it happened: Flight cancellations and lorry crashes cause misery as airports warn of more disruption
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Motorists faced dangerous conditions and air travellers suffered disruption to flights after snow and ice struck parts of Britain.
Thousands of people were left without power overnight, and the Met Office warned of the risk of slips and falls on icy surfaces.
The southbound carriageway on the M1 was closed after a lorry crashed near Lutterworth, while another jack-knifed on the M5 near Gloucestershire in heavy snow.
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Snow and sub-zero temperatures hit the UK
Show all 13Birmingham Airport warned passengers flights could be affected by snow while Stansted Airport warned passengers that delays and cancellations were likely to continue as a result of the weather.
The Met Office issued a yellow warning for ice across Northern Ireland, large parts of Scotland and the north-east coast of England.
A yellow warning over snow and rain was also triggered for the Midlands, London and the South East, the North West, South West and Yorkshire and the Humber. It will remain in place until 11am on Wednesday.
All lanes have been reopened on the M1 following this morning's lorry crash.
Around 11,000 homes across the Midlands are still without power, reports the BBC. Engineers are having to deal with more than 200 faults across the network due to the snow and ice.
A second crash on the M1 southbound has left two lanes closed. The collision happened between junctions 21A and 21. Emergency services are now on the scene.
Meanwhile on the A14... drivers stuck in snow are being welcomed by a rather worse-for-wear looking snowman in a Hi-Vis jacket. Highways England are advising those stranded on the roads to stay with their vehicles, keep their heaters on and wrap up where possible.
A fresh yellow weather warning for ice has been issued by the Met Office for the southern half of the UK. Icy patches are expected to develop later on Wednesday and on Thursday morning.
This is how lorries are being dragged off the A14 this morning. Multiple collisions are reported near Kettering due to the snow.
Simon Calder, The Independent's travel correspondent, reports more than 30 British Airways flights in and out of Heathrow have been cancelled due to the weather:
British Airways has cancelled more than 30 flights to and from Heathrow because of the wintry weather. Services to Amsterdam, Munich and Paris are among those affected. Earlier this month, hundreds of BA flights to and from Heathrow were cancelled because of de-icing problems.
BA is telling travellers: “Sleet and possibly snow are forecast for the Heathrow area this morning so we are making some adjustments to our schedule.
“During cold weather conditions aircraft have to be de-iced prior to departure to ensure that they are safe and additional measures are taken to ensure the safety of our operation is maintained at all times.
"We ask customers to check the status of their flight before they come to the airport and we will do all we can to minimise the effect the weather has on our operations.
In addition, Eurowings has cancelled a round-trip from Hamburg to Heathrow.
London City airport has seen five diversions of arriving flights: two on KLM and Flybe, which went to Southend, and one on Alitalia that touched down at Gatwick.
A fresh yellow severe weather warning has been issued for ice in Scotland, northern England and Northern Ireland. Injuries from slips and falls are possible, the Met Office says.
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