After two days of eating and drinking in lavish style, Boxing Day is when many of the royals get up early, pull on their waxed Barbour jackets and wellington boots, and load their guns for a day of shooting on the 20,000-acre Sandringham estate. Although for many of us the day is about strolling off the excesses, playing games and snuggling in front of the TV, senior members of the family are expected to join the hunt for plump pheasants or grouse.