(FILES) Charles Spencer, brother of Britain's late princess Diana, arrives at Kensington Palace for the unveiling of a new statue to his sister on what have been Princess Diana's 60th birthday in London on July 1, 2021. Charles Spencer, the brother of the late princess Diana, revealed on August 18, 2026 he has penned a book "to tell the truth" about his sister and her life as the 30th anniversary of her death looms. (Photo by Daniel LEAL / AFP via Getty Images)