Working as a royal butler entails everything from preparing drinks, running errands and welcoming guests to overseeing meals , and King Charles ’s former butler at Highgrove has revealed one major rule the staff couldn’t break while working for The King . Speaking on behalf of Smooth Spins Casino , Grant Harrold says that when dealing with pieces that have been in the Royal Family for hundreds of years, “it was all about respecting the craftsmanship of the furniture, which had often been there for generations.” Since some of the furnishings were extremely delicate, the former butler says he was prohibited from using one item. “I remember very clearly being told never to use polish on the furniture—it always had to be beeswax. That was the rule, no exceptions.” Article continues below Grant Harrold worked for King Charles between 2004 and 2011. (Image credit: Vikki Bruce) A banquet table is prepared for the Nigerian state visit at Windsor Castle.…