The National Grid has triggered its back-up power plan as the UK battles sub-freezing temperatures and widespread snow.
The energy network is facing a surge in demand as temperatures have plunged in its coldest night of the year so far, with temperatures in Scotland dipping below minus 15C. Braemar in Aberdeenshire recorded minus 15.7C overnight, the Met Office said. .
Snow has also fallen across the country, causing airports to shut their runways and major delays to motorways.
