Waterfalls freeze as Arctic blast could bring lows of -20C this weekend - as Britain experiences coldest January night for 15 years
The country experienced its coldest January night for 15 years on Thursday as temperatures fell to nearly -15C .
UK weather: Temperatures could fall as low as -20C after UK records coldest night in 15 years
Friday night is likely to be the chilliest of the current cold snap, the Met Office says, aided by still conditions, high ...