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Large swathes of water across the UK are freezing over as Arctic temperatures sweep the country.
A waterfall in the Brecon Beacons was transformed to solid ice as the cold weather front dubbed the “Beast from the East” moves across from Siberia.
The cascade near Pen y Fan was not the only expanse of water to freeze over.
In Weston-super-Mare , the tideline turned to ice as the mercury plummets into minus temperatures.
Forecasters have warned of a “potential risk to life” in the unseasonably cold temperatures and the Met Office said there was a good chance rural communities will be cut off with heavy snow showers likely in parts of the country.
In Wales, temperatures will fall to as low as -10C in some parts.
Forecasters said another weather system, Storm Emma, will bring blizzards, gales and sleet to the UK on Thursday and Friday.
Met Office forecaster Frank Saunders said: “Parts of England and Wales are likely to see their coldest spell of weather since at least 2013, and possibly since 1991.
Show all 51 1 /51Arctic blast hits UK – in pictures Arctic blast hits UK – in pictures Members of the Serpentine Swimming Club brave the icy depths of the Serpentine in Hyde Park
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Arctic blast hits UK – in pictures A person crosses the snowy street in Edinburgh's Royal Mile
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Arctic blast hits UK – in pictures St Michael's Mount, near Marazion, Cornwall, lies covered in snow
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Arctic blast hits UK – in pictures Edinburgh's Princes Street in the snow
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Arctic blast hits UK – in pictures Houses covered in snow Penzance, Cornwall
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Arctic blast hits UK – in pictures Canal boats are frozen into Birmingham's canal system
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Arctic blast hits UK – in pictures The M62 near Huddersfield was closed for hours on Thursday. A Highways England vehicle set alight
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Arctic blast hits UK – in pictures The M80 near Glasgow was stationary for hours on Wednesday night
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Arctic blast hits UK – in pictures A family make their way in the snow in Balloch, Scotland
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Arctic blast hits UK – in pictures Closed barriers at Paddington in West London as trains were cancelled from the station
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Arctic blast hits UK – in pictures Workers clear a platform at Paddington station in west London
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Arctic blast hits UK – in pictures A council worker breaks the ice on the fountain in Trafalgar Square in London
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Arctic blast hits UK – in pictures A 4x4 makes its way along the road in Alexandria, Scotland
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Arctic blast hits UK – in pictures Two boys play in the snow on a housing estate in Alexandria, Scotland
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Arctic blast hits UK – in pictures The M876 to Glasgow is closed due to snow as storm Emma, rolling in from the Atlantic, looks poised to meet the Beast from the East’s chilly Russia air
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Arctic blast hits UK – in pictures Icicles form on the seafront railings at Penzance in Cornwall
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Arctic blast hits UK – in pictures The British Waterways building in Nottingham
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Arctic blast hits UK – in pictures Snow lingers on rooftops of houses in Newlyn near Penzance, ahead of the arrival of Storm Emma
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Arctic blast hits UK – in pictures A commuter in a hi-viz jacket cycles through the snow
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Arctic blast hits UK – in pictures A taxi crosses London Bridge
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Arctic blast hits UK – in pictures A pedestrian walks along Whitehall in London.
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Arctic blast hits UK – in pictures A woman feeds the birds in Kensington Gardens
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Arctic blast hits UK – in pictures Snow ploughs clear drifts on the sea front road in Whitley Bay, North Tyneside.
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Arctic blast hits UK – in pictures Vehicles slow in the snowy conditions.
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Arctic blast hits UK – in pictures Icicles hang from a frozen elephant fountain in Colchester.
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Arctic blast hits UK – in pictures A young man takes a running jump down a snow covered hill with his sledge.
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Arctic blast hits UK – in pictures People help push a car that got stuck in the snow in Rochester.
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Arctic blast hits UK – in pictures Stationary traffic on the M20 near Ashford.
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Arctic blast hits UK – in pictures A Eurostar train passes through Ashford.
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Arctic blast hits UK – in pictures People use their sleds in the snow in Jackson's Fields in Rochester.
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Arctic blast hits UK – in pictures Parents walk their children to school in Ashford, Kent, as heavy snowfall is affecting roads across the UK.
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Arctic blast hits UK – in pictures Cars travel through Great Chart in Ashford, Kent.
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Arctic blast hits UK – in pictures Vehicles crawl along a road as snow falls in south east England, as seen through the window of a train travelling from London to Canterbury.
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Arctic blast hits UK – in pictures People walk in the snow in the village of Brenchley in southeast England.
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Arctic blast hits UK – in pictures A swimmer braves the snowy conditions at King Edwards bay near Tynemouth.
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Arctic blast hits UK – in pictures A woman scrapes ice from her car.
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Arctic blast hits UK – in pictures People sled in the snow in Rochester.
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Arctic blast hits UK – in pictures Children play on sledges outside Rochester Castle.
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Arctic blast hits UK – in pictures Toby Stanton walks to school in Ashford during heavy snowfall.
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Arctic blast hits UK – in pictures Snow stands by parked trains at Ashford International in southeast England.
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Arctic blast hits UK – in pictures A snowy Tynemouth beach, following heavy overnight snowfall.
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Arctic blast hits UK – in pictures Roads across the UK have seen a blanketing of snow, with police forces reporting treacherous driving conditions and blocked routes.
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Arctic blast hits UK – in pictures Commuters face a miserable journey to work as the snow falls in freezing temperatures in Pimlico.
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Arctic blast hits UK – in pictures People photograph a frozen waterfall near Pen y Fan mountain on Brecon Beacon National Park, Wales.
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Arctic blast hits UK – in pictures A woman laden with shopping struggles through the snow in south London.
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Arctic blast hits UK – in pictures Commuters walking in the snow on London Bridge.
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Arctic blast hits UK – in pictures A woman carrying an umbrella walks past a homeless person sleeping in a doorway during a snow shower in London.
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Arctic blast hits UK – in pictures People make their way through a snow flurry in London.
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Arctic blast hits UK – in pictures Trucks are stuck after heavy snow on the motorway in Briscous, near Bayonne, southwestern France
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Arctic blast hits UK – in pictures A commuter pedals along Whitehall in central London
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Arctic blast hits UK – in pictures A man places snow chains on his tyres in Leek, Staffordshire
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“This could lead to dangerous conditions on roads and pavements and have an impact on people’s health.”
Storm Emma will be “significantly disruptive” with the risk of power cuts and transport delays, he added.
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