King Charles is expected to plan a family Christmas at Sandringham to maintain a royal tradition.The Royal Family will continue to gather on the 73 year old King's Norfolk estate in December as the new monarch's reign begins. Charles, who is known to be a "stickler for tradition", is determined that the monarchy conveys a sense of stability and continuity, insiders close to him have claimed. A source told The Telegraph: "His philosophy is that the monarchy is the constant state, inhabited by different individuals.