A former butler for the royal family has lifted the lid on Prince William’s romantic side when it comes to Valentine’s Day and charming wife Kate Middleton. Grant Harrold, who used to work for The Firm, says the Prince of Wales was always a “true gentleman” when it came to wining and dining Kate Middleton. He says Prince William is likely to treat his wife even more this year because of her recent routine surgery in hospital. The ex-staffer also remembers King Charles had a soft side, saying he would take Camilla – and Princess Diana when she was alive – to dinner on February 14. Prince Willia…