Drivers are being warned of "extremely dangerous" driving conditions in Wales as temperatures plummeted overnight. Dyfed Powys Police has warned that the back roads in Pembrokeshire may not have been gritted.
The warnings came as four children were taken to hospital in critical condition after being rescued from a lake in Solihull in the West Midlands on Sunday afternoon after falling through ice.
Read how the emergency services are still at the scene here.Travel disruption is expected for Monday's morning rush-hour as yellow warnings of ice, fog and snow are in place for much of the UK.
In Wales, there are warnings that freezing fog could be an issue especially in Powys, Flintshire and Wrexham.Temperatures were expected to stay well below freezing overnight and combine with wintry showers to create icy conditions.