Working for King Charles , former butler Grant Harrold got a unique insight into the inner workings of the Royal Family, and this includes their special nicknames. Harrold served The King at Highgrove House between 2004 and 2011, and he says there were three members of the family who insisted on less formal greetings—and others had their own secret code names. Speaking on behalf of Smooth Spins Casino , Harrold said, “When speaking directly to members of the Royal Family, we used their official titles unless told otherwise. However it was only William, Harry and Kate who wanted the less formal name option.” The former butler says that the now-Princess of Wales “was always known as Kate” behind the scenes when he worked for King Charles, and that “William always called her Kate.” When Harrold first met Middleton, who was dating Prince William at the time, “she introduced herself to me as Kate—and asked me to call her that,” he says.…