5,000 people run alongside Princess Beatrice and a host of celebrities and athletes in The National Lottery Olympic Park Run.
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It will be a cold day today, with temperatures dipping below freezing shortly after dark.
Two police officers stepped in to help deliver a newborn on Christmas Day in a dramatic intervention caught on camera.
Sir Bruce Forsyth has admitted he does not miss Strictly Come Dancing, describing his time hosting the show as a "lonely" experience.