Settled snow has turned to treacherous ice and caused disruption on roads and railways across the country on what has been dubbed Black Ice Monday following a wintry blast that left thousands of people stranded at airports.

The deep freeze has also seen hundreds of schools close, thousands left without power and flights delayed on Monday - including at Heathrow where passengers have complained of waiting hours for travel to be rescheduled.

The Met Office has extended its yellow weather warnings for snow and ice to cover vast swathes of the country, including London and the South East, much of the Midlands, Northern Ireland and Wales, as well as the eastern coast of England and northern and western Scotland.

Forecasters warned that clear skies on Monday night could see temperatures drop as low as minus 15C (5F), potentially beating Sunday night's low of minus 11.6C (11F) in Chillingham Barns, Northumberland.

Heavy snow still lying on the ground, particularly around the Hereford area, has disrupted services on West Midlands Railway and Great Western Railway, while London Northwestern Railway trains to Milton Keynes from London have been delayed or cancelled.