The Met Office has issued a Yellow weather warning across Scotland, Northern Ireland and parts of England and Wales following another cold night that saw temperatures drop below zero.
Ice is expected to form on stretches of untreated roads, pavements and cycle paths from Wednesday afternoon through to well into Thursday morning.
Wintry showers will also spread from the west, with some snow expected at higher parts of western Scotland and Northern Ireland.
Temperatures in parts of the UK dropped to below those in Moscow on Tuesday, with the mercury registering as low as -13C in Shropshire.
Dozens of schools in the South West, West Midlands and Wales have also kept their gates closed for a third day following the bitterly cold conditions.
