The Met Office added that winds are expected to strengthen by dawn and a widespread frost is likely to form.A separate alert covering the North of England and parts of Scotland warned of snow of up to 4in (10cm) in areas above 900ft (300m), with “some drifting in the strengthening winds”.The current lowest temperature this winter was minus 11C (12.2F) which was recorded at Cromdale in Moray, North East Scotland, on December 5.Met Office forecaster Sophie Yeomans said: “The very lowest that we could see – and that’s up Scotland and the mountains up there – we are looking at minus 6C, minus 8C, (21-18F) so pretty cold, but I think pretty widespread across most of the UK we are going to see temperatures dipping below zero.”It should start feeling less cold from Monday, Ms Yeomans said, although maximum temperatures will still only be 5-6C (41-42F). A snowy scene on the North Yorkshire moors on Friday as Britain’s cold snap persistsCredit:Owen Humphreys/PA London and the Home Counties were hit by snow on Friday, during a mini cold snap that will bring a freezing weekend.The Met Office issued a severe weather warning for the capital and the South East for Friday night and Saturday.The alert warns of the risk of “persistent snow” for the region as temperatures are predicted to fall below zero this weekend – and will feel even more raw thanks to winds from Scandinavia. A man walks his dog brave icy conditionsCredit:Owen Humphreys/PA Public Health England (PHE) issued a warning as the temperatures plummeted.Professor Paul Cosford, medical director and director of health protection at PHE said: “With more cold weather across all parts of England now is the time to really think how it could impact you and your family, particularly those who are very young, over 65 or who have heart and lung conditions.” Meanwhile, temperatures could dip to as low as minus 10C (14F) overnight into Saturday in some mountainous parts of Scotland, where as much as 4in (10cm) of snow is expected.Friday was “particularly cold” in England, with temperatures of 2-3C (36-37F) in the Midlands, London and eastern areas, and scattered snow showers. Overnight the mercury will plunge to as low as minus 1C. Walkers in the snow on Friday as the Met Office warned of a sub-zero weekendCredit: Owen Humphreys/PA Elsewhere was a degree or two warmer, with highs of only 5C (41F) in the South West, Wales and western Scotland.The Met Office warned of disruption to transport, as well as slippery conditions on roads and pavements this weekend. “Some disruption to transport is possible as well as slippery conditions on roads and pavements,” the alert said. A grouse navigates a snowy hill on the North Yorkshire moorsCredit: Owen Humphreys/PA The Met Office warned temperatures would be ‘particularly cold’ in England, with temperatures of 2-3C (36-37F) in the Midlands, London and eastern areasCredit:Neil Squires/PA Show more He added: “Try to keep homes heated to at least 18C (64F), stock up on any essential medicine or food that you need before the cold arrives and remember that you will be warmer wearing several thin layers instead of fewer thick ones.” Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.