Areas from London to Shetland saw snow on Wednesday.
There were dozens of school closures in north-east Scotland and the Highlands and road closures including on the Woodhead Pass between Hollingworth and Flouch in Derbyshire and the B4391 between Rhyd y Sarn and Pen y Bryn in north-west Wales.
Temperatures on Wednesday night could fall to as low as -5C (23F) in Scotland and northern England, and -3C (26.6F) in other parts of England and east Wales.
With a frost expected, areas where showers or rain and sleet have left the ground damp are at risk of ice becoming a hazard on roads and pavements. Forecasters warn that buses and trains may be cancelled or delayed.
But the conditions are unlikely to resemble the snowy and icy spell this time last year which closed hundreds of schools and saw 12cm of snow in Nottingham.
Over recent decades the Met Office have observed a decrease in the frequency, duration, and intensity of cold spells, clearly linked to climate change. According to the latest State of the Climate Report,, external external, air and ground frosts have reduced by around a quarter since the 1980s.
