Black ice warnings have been issued by emergency services today, with more snow set to fall amid fears of fresh travel chaos for commuters.
A yellow warning for snow in parts of Wales is in place until 11am, with between two and six centimetres of snow forecast.
Rain and sleet are also expected to affect driving conditions in the West Midlands as Britain’s shivering spring continues.
Overnight, temperatures plunged to as low as -2.9C in Santon Downham in Suffolk, while snow began falling on higher ground in places including Powys in Wales.
The Met Office urged drivers to take care on icy stretches of road.
Forecaster Luke Miall said: “It will cause some disruption for the morning commute in certain areas. There could be some minor road closures if it’s particularly bad over some of the higher routes.”
In County Durham, the fire service warned people of black ice and slush on the A1M near Chester-Le-Street, and said there had already been several accidents.
Commuters in the south east faced severe rail delays this morning after trains were disrupted by the cold weather.
Southeastern trains, which runs services into London, said there were no services on some of its lines and delays on others.
Affected trains included those on the Hastings Line, where there was no service, some via Faversham and others on the Medway Valley and Maidstone East lines.
Problems were “due to the severe cold weather icing the power lines”, the company said.
The Met Office earlier warned commuters they face delays to their morning travel Central and southern parts of England could see heavy thundery downpours throughout the day, while the best of the weather is likely to be across eastern England.
Temperatures are predicted to struggle to get above 10 or 11C, but could feel as low as 7 or 8C in the wind and rain.
It comes as spring got off to a wintry start across many parts of the country this week, with hill snow, hail and sleet.
Forecasters previously said a deep area of low pressure is centred over the UK, bringing with it the potential to drive showers and produce long spells of wet and changeable weather.
A “sudden microburst” of hail and snow caused a 24-car motorway pile-up, Lancashire Police said on Wednesday morning.
The M55 was closed in both directions but no-one was seriously injured, the force said.
Friday could see rain in the west and far north, with conditions being brighter elsewhere.
The weekend will feature drizzle in the east, with brighter spells in other parts of the country and conditions becoming warmer away from the east coast.