Princess Kate and Queen Camilla deliver masterclass in diplomatic dressing as Oman state visit kicks off: The Prince and Princess of Wales have welcomed the Sultan of Oman to Windsor for a three-day state visit to the UK, with both Kate and Camilla dressing in the colours of the Oman flag #RoyalVisit #OmanStateVisit #PrincessKate #QueenCamilla #DiplomaticDressing