Freezing temperatures have gripped Scotland again, with an overnight low of -13.6C recorded at Altnaharra in the Highlands. More than 50 schools remain closed in the region, with 13 shut in Aberdeenshire. Hundreds of other pupils are also expected to get another day off due to closures in Moray, Orkney, Shetland and the Outer Hebrides.

Altnaharra, a hamlet in the most northern region of the Highlands, had reached the temperature before 9pm on Friday.

The Met Office confirms Friday was the coldest night of winter so far in the UK, with the temperatures falling to -17.3C in Altnaharra in the Scottish Highlands. Meanwhile, Saturday is likely to be bitterly cold,

The UK has recorded its coldest January night in 15 years as more freezing temperatures are expected to roll in over the coming days. In Altnaharra, a hamlet in Sutherland, the most northern region of the Highlands,

Overnight temperatures fell as low as minus 14C in Altanharra, northern Scotland, according to the Met Office.