Temperatures have plunged to -12C across Britain as the Met Office issued yellow weather warnings for ice covering 41 areas, creating treacherous conditions for millions of commuters and residents.
The widespread warnings span England, Scotland, Wales and Northern Ireland, with untreated roads and pavements becoming dangerously slippery. Travel disruption is expected as icy surfaces increase the risk of accidents and falls across the country.
Scotland bore the brunt of the arctic conditions, with rural and highland areas recording the lowest temperatures of -12C overnight. Northern and central England also faced sub-zero conditions, whilst Wales and Northern Ireland reported widespread ice patches on minor roads and shaded areas following recent rainfall.
Clear skies and incoming cold air masses triggered the sharp overnight temperature drop. Freezing fog is forecast for some regions, threatening to reduce visibility further and compound driving hazards for morning commuters.
The Met Office urged drivers to allow extra journey time and check tyres and fluid levels before travelling. An emergency kit is recommended for longer trips. Pedestrians should wear appropriate footwear and watch for black ice, which can be nearly invisible on road surfaces.
Elderly residents and those with health conditions are advised to keep homes warm and check on neighbours during the cold snap. Local authorities across affected areas have deployed gritting teams to tackle the worst-hit routes.