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Why the UK is set for a cold snap

13 January 2013 Last updated at 09:04 GMT

Weather warnings are in place across the UK, with freezing temperatures and snow expected over the next few days.

Temperatures are set to fall below freezing across the UK, dropping to -2C in towns and cities and possibly below -5C in the countryside.

BBC Breakfast spoke to meteorologist Simon King to find out what is causing the cold snap and how long it might last.