Lady Louise Windsor has made a surprise appearance with her mother the Duchess of Edinburgh at The London International Horse Show. With Royal Family set to gather at Sandringham to celebrate Christmas , as befits tradition, the festive outing saw the eldest child of the Duke and Duchess accompany her mum to the equestrian event. Lady Louise sported a pink shirt, tucked into a black and white maxi skirt, with her signature glasses and her hair up, while Duchess Sophie was wearing a tan skirt,