Temperatures dipped to another low of -13°C overnight, making it the coldest December night since 2010. That low was recorded in Lampeter, with -11°C in Tirabad, Powys.
Temperatures today are not expected to rise higher than 6°C as the Artic blast continues, and there is an amber warning for snow across the central belt of Scotland, but there is a change on the way over the weekend.
On Thursday, there was widespread train disruption after signals froze near Cardiff Central when a heating system broken down and there were delays on the M4 as ice was removed from the Brynglas Tunnels.
