The royal family are well known for their competitive nature, from the banning of Monopoly due to major rows through to healthy sibling rivalry when it comes to sports.  There’s one surprising thing that the royals “obsess” and compete ferociously over behind closed doors, however.  In his memoir Spare, Prince Harry revealed all, explaining that his family is fiercely competitive about who does the most royal engagements, which get recorded in an online diary called the Court Circular. He penned: “Though none of us ever spoke about the Court Circular directly, or mentioned it by name, that only created more tension under the surface, which built invisibly as the last day of the calendar year approached.  © Getty ImagesSibling rivalry extended to events too “Certain family members had become obsessed, feverishly striving to have the highest number of official engagements recorded in the Circular each year, no matter what, and they’d succeeded largely by including things that weren’t, strictly speaking, engagements.” © Buckingham PalaceKing Charles working hard behind his desk at Buckingham Palace King Charles is notorious …