The Queen and Princess Margaret were photographed by Ray Bellisario while on Holiday at Sunninghill Park near Windsor on this day in 1964, 60 years ago, shortly after the births of Prince Edward and Lady Sarah.
Queen Elizabeth II (left) helping her sister, Princess Margaret, into a wetsuit prior to water-skiing at Sunninghill Park, Windsor.
Queen Elizabeth II (centre) watches whilst her sister Princess Margaret, wearing a wetsuit, prepares to water-ski at Sunninghill Park, Windsor
Queen Elizabeth II (right) helping her sister, Princess Margaret (in the water), in rescuing a corgi which had fallen in the lake at Sunninghill Park, Windsor.
Queen Elizabeth II (right) sits back whilst her sister, Princess Margaret, wearing a wetsuit, prepares to water-ski at Sunninghill Park, Windsor
Princess Margaret, smoking a cigarette, and sweeping the dock whilst wearing a wetsuit at Sunninghill Park, Windsor
Princess Margaret (centre) wearing a swimming costume and wrapped in a towel, with friends at Sunninghill Park Windsor.
Princess Margaret in a wetsuit tying a motorboat to the dock at Sunninghill Park, Windsor
Princess Margaret wearing a wetsuit and carrying a broom at Sunninghill Park,
Princess Margaret sitting beside the lake at Sunninghill Park, Windsor