Pictures were shared on social media of frozen lakes and ponds in Regent’s Park and Hyde Park on Saturday.
The chilly conditions froze Trafalgar Square’s fountains and brought large amounts of snowfall to regions across the country.
Food and travel writer Sybil Kapoor shared pictures of frozen flood water near the dell in Hyde Park.
She wrote on Twitter: “The wind may be bitter but it’s so beautiful in [the Royal parks]”.
Food and travel writer Sybil Kapoor shared pictures of frozen water in Regent’s Park on Saturday
/ Sybil Kapoor
Footage of Londoners enjoying the frozen water in Hyde Park was also shared on TikTok.
The Met Office has said milder conditions are on the way after a week of wintry weather.
The forecasters predicted temperatures will begin to rise towards double figures into next week.
Yellow weather warnings for snow and ice are in place across most of Scotland and parts of northern England and Wales on Saturday, and again on Sunday, as well as eastern parts of Northern Ireland.
Blizzards are forecast to sweep across Northern Ireland on Saturday, with wind speeds reaching 40mph in coastal areas.
Met Office forecaster Luke Miall said: “Blizzard conditions will really significantly reduce visibility when driving. We have gusts in the region of 35mph to 40mph on the coast and nearly 30mph inland.”
Loch Glascarnoch, near Garve in northern Scotland, recorded the lowest temperature in the UK on Friday night at minus 6.5C
The mercury dropped to minus 5.8C overnight at Pennerley in Shropshire, minus 5.6C at Parc Bryn Bach in Tredegar, South Wales, and minus 1.7C in Killylane, Co Antrim, Northern Ireland.
Sybil Kapoor said water near the dell in Hyde Park had frozen over
/ Sybil Kapoor
Chief meteorologist at the Met Office, Neil Armstrong, said: “For the past week the UK has been in a very cold airmass with temperatures well below average, this will change through the weekend as milder air moves in from the Atlantic and pushes that cold airmass out into the North Sea.
“Where temperatures were close to freezing in many places last week, we could expect to see 11C or 12C next week.
“There are still some wintry hazards to get through over the next few days, with low temperatures, strong winds and further snow especially in Northern Ireland.”
He added: “On Sunday there is a risk of freezing rain over the high ground in Scotland and northern England, with further snow in the Scottish hills, before turning to rain as the warm air takes hold.”
Shaharyar Khan, from Leytonstone, practices his skating on a flooded field that has turned to ice in Hollow Pond in Leytonstone, east London
The coldest UK temperature for 65 years was recorded at Braemar in Aberdeenshire on Wednesday night, when the mercury dropped down to minus 23C.
A record low temperature for February was also recorded in England and Wales when temperatures in Ravensworth, North Yorkshire, dropped to minus 15.3C overnight on Thursday.
Public Health England (PHE) has extended its cold weather alert through the weekend and has urged people to check on vulnerable relatives and neighbours.
Dr Owen Landeg, group leader for extreme events and health protection at PHE, said: “Cold weather can have a serious impact on health, particularly for older people and those with heart and lung problems, as it increases the risks of heart attacks, strokes and chest infections.
“Make a call, or socially-distanced doorstep visit if they live close by, to remind them to heat their home to at least 18C, 64.4F, and to keep up to date with the forecast.
“It’s also helpful to check they have enough food and drinks and any medicines they need.”
Additional reporting by PA Media.