King Charles III is said to be having “regrets” from parading Prince Andrew in front of the world during a Christmas Day church service procession. “The King is in a difficult position in so much as I think he made a mistake at Sandringham,” former royal journalist Charles Rae told an outlet. “That wasn’t an official royal outing, it was a family outing,” Rae added when discussing the annual royal family walk to and from St Mary Magdalene Church to Sandringham House on Christmas. “He should have told Andrew not to turn up. I think he may well regret that decision. The King has tried to kick hi…