Live updates as temperatures plummet to -8°C and police warn of 'extremely dangerous' roads

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. BBC Wales weather presenter Rhian Haf said on Monday morning: "The coming week will be exactly as it was last week, bitterly cold and it is a wintry picture.

"There is another widespread frost on Monday morning after temperatures dropped to -8°C in parts of Ceredigion and Powys, and -7°C in Capel Curig. A couple of wintry showers to start over Anglesey but those showers will be moving westward over the Irish Sea. There will be icy patches generally on untreated surfaces. Some places won't rise above freezing, although slightly milder along the coast."

Snowfall on Sunday evening forced Gatwick and Stansted to close their runways and left drivers struggling to get through. Kent was being particularly hard hit, with snow severely impacting the M2, the M20 around junctions 8 and 9, the A21 and the A249, with drivers struggling to get through, the organisation said.

Met Office chief meteorologist, Steve Willington,