Motorists warned as snow turns to ice

Motorists have been urged to take extra care in treacherous conditions as snow across much of the UK turns to ice.

The Met Office has issued 13 amber warnings for ice after disruption to road, rail and air travel following up to 16cm (6in) of snow in some areas.

Hundreds of vehicles were stranded on the M25 and M40, with drivers forced to spend the night in their cars.

Philippa Thomas reports.