Revealing the secrets of Christmas in our royal palaces, from strange traditions to momentous events. We hear from eyewitnesses to legendary moments, like Wayne Sleep smuggling himself into Kensington Palace to teach Princess Diana, and a pub landlord who served Queen Elizabeth II after she got stranded in a snowstorm. The story of Harry and Meghan's romance, Sandringham's Christmas history, and the Queen's train journeys to Norfolk are also uncovered.