5th May 1951: Queen Mary chatting to her grandsons Prince William of Gloucester and Prince Michael of Kent during a visit to the Festival of Britain on the South Bank in London. (Photo by Fox Photos/Getty Images)
5th May 1951: Queen Mary chatting to her grandsons Prince William of Gloucester and Prince Michael of Kent during a visit to the Festival of Britain on the South Bank in London. (Photo by Fox Photos/Getty Images)