Princess Margaret burnt Princess Diana's letters to Queen Elizabeth to 'protect' royal family
Princess Margaret was very protective of her royal lineage, and went to great lengths to protect her mother, sister and other members of the royal family. According to royal biographer William Shawcross, she went to the extent of even destroying letters that the late Princess Diana sent to both Queen Elizabeth II and her mother, the Queen Mother, because they were "highly personal."
The Express reports that Shawcross claims that Margaret informed a friend that she had ordered for large bin bags of personal letters to be destroyed because they were very personal in nature.
Shortly after Diana and Prince Charles separated, Margaret went through the Queen's documents in 1993 and burned thousands of letters to protect the royal family from any further humiliation, which she perceived Diana had brought on the family with her affairs and interviews.