Temperatures as low as minus 17C have seen the heavy snow which fell on Tuesday and Wednesday ice over, creating more havoc on the roads, trains and at airports - and shutting thousands more schools across the country for another day.
Forecasters warned of icy roads and treacherous travel conditions across virtually the whole country - and no let-up yet in the Arctic conditions.
Steve Ellison, from MeteoGroup, the weather division of the Press Association, said: "It is very icy out there. Everywhere there has been snow has been affected, especially where the snow melted.
"There's no end in sight to the cold weather at the moment. It is going to be like this for a good few days yet."