Kate Middleton and Prince William showed a rare public display of affection when she briefly tapped him on the bum, as they joined King Charles and Queen Camilla in Scotland. The King and Queen were presented with the Scottish crown jewels in a huge service today, which has been referred to by some royal watchers as the "second Coronation." Kate, who was a vision in a beautiful blue ensemble, raised some eyebrows during the ceremony when, despite the formality of the occasion she appeared to show off her cheeky side by tapping her husband on the behind and they whispering something in his ear.