[London, January 5. Image via Getty.]

LONDON - JANUARY 05: A girl holds a piece of ice from the Trafalgar Square fountain on January 5, 2010 in London, United Kingdom. The MET office confirmed that the Christmas period has been the coldest for 25 years with temperatures as low as -17C being recorded. Commuters and air passengers faced long delays today as the continued frigid temperatures grip the country. (Photo by Dan Kitwood/Getty Images)