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Jack Frost nipping at the United Kingdom

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A horse looks out from a frozen field near Bath, Dec. 12, in Somerset, England.

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The early morning frost clings to a cobweb in Regents Park on Dec.12, in London, England.

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People take photos as the frost lingers on the trees at Westonbirt Aboretum on Dec. 12, near Tetbury, England.

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A woman's breath can bee seen on a freezing morning in Regents Park, Dec.12, in London, England. F

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Early morning frost in Hyde Park on Dec. 12, in London, England.

Forecasters have warned that the UK could experience the coldest day of the year so far today, with temperatures dropping as low as 7 F ( -14C), bringing ice, harsh frosts and freezing fog.  About 150 flights have already been cancelled at London’s Heathrow Airport due to fog, and heavy snow is expected in some parts of the country.