This Princess Diana photo contains
business suit, suit, suit of clothes, dress suit, full dress, tailcoat, tail coat, tails, white tie, and white tie and tails.
There might also be
three piece suit, slack suit, two piece, two piece suit, and lounge suit.
Diana, Prince Charles, and Harry escort William for his 1st day at Eton. After William signed the school pupil registration book, the family posed for photos. September 6, 1995.