Temperatures will plummet to -4C overnight across four UK regions as the Met Office issues a yellow frost warning affecting millions of commuters and residents. The alert, covering Scotland, Northern Ireland, north-east England and East Anglia, remains in force from 9pm Tuesday until 10am Wednesday, with officials warning of hazardous icy patches on untreated surfaces.
Scotland bears the brunt of the warning, with the Highlands, Grampian, Central, Tayside & Fife, Strathclyde and South West regions all affected. The entire of Northern Ireland falls under the advisory, whilst in England, Northumberland and County Durham face sub-zero conditions alongside Norfolk and Suffolk in East Anglia.
Clear skies and light winds following a recent cold front have created perfect conditions for widespread frost formation. With wind speeds below 10-15mph and minimal cloud cover, heat is radiating rapidly from the ground overnight. Roads and pavements still damp from earlier rainfall face particular risk of ice development.
Motorists are urged to allow extra journey time, check tyre pressures and thoroughly de-ice windscreens before travelling. Pedestrians should wear appropriate footwear with good grip and remain alert for slippery surfaces. The elderly and vulnerable residents are advised to stay warm indoors, with neighbours encouraged to check on those most at risk.
Whilst the current warning expires Wednesday morning, the Met Office continues monitoring conditions and may issue fresh alerts if temperatures drop further. Forecasters predict a gradual warming trend towards the weekend, but residents must exercise caution until conditions improve.