Motorists were told to prepare for delays in cold weather after more than 100 cars were stranded on the A30 near Temple in Cornwall overnight.
Highways England said on Friday morning that it had teams of gritters and ploughs working to get traffic moving across the UK as councils put cold weather plans into action.
An overturned vehicle on the busy M3 motorway into London was among the early road incidents causing congestion.
In Cornwall, two school buses, at Kingsley Village and at Winnard’s Perch, were stuck in the snow, but both vehicles were reached during the early evening, with the children safe and well, the county council said.
Despite the cold, the Duke and Duchess of Sussex were greeted by enthusiastic crowds in the south west city as they visited its Old Vic theatre.
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