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Fun, fanfares and feats of derring-do are on the menu in today’s 5,000th episode of Blue Peter.

To celebrate this auspicious occasion, a brand-new ‘diamond’ Blue Peter badge is being launched, 55 years after the original.

Famous faces will be recalling their memorable Blue Peter badge moments from over the years, while presenter Lindsey Russell will be channelling her inner John Noakes to scale the mast of HMS Belfast, a dizzying 100 feet above the River Thames.