Prince Harry and Prince William always enjoyed the same strange snack after school, a special take on a British classic – alongside a dollop of ketchup – the Queen's former chef has revealed.Darren McGrady served food to the royals for 11 years and has now opened up about what went down best in The Firm. Although one might assume that the Royal Family have overly exotic tastes, McGrady revealed that the young princes' favourite snack was actually the humble sausage roll.However, Harry and William weren't popping into Greggs on their way back to the Palace.