Kate Middleton has shared a short clip of herself speaking to people who took part in her new photo book Hold Still.The 39 year old's upcoming book, which will be released on 7 May, is a collection of photographs depicting the UK during the coronavirus lockdown.The clip starts with a young child addressing the Duchess of Cambridge as they said: "Good morning Your Royal Highness," to which she responded: "Good morning, my goodness me you're so polite Mila!" As a photo of Mila looking out of a