Charles Spencer's memoir about his sister Diana has prompted fierce criticism from supporters of King Charles, who argue Spencer should have remained silent given the King's current difficulties and health challenges. However, columnist A.N. Wilson defends Spencer's decision to publish, arguing that the book's contents are truthful and that Spencer was right to come forward at this time, rather than viewing the publication as a malicious or self-serving act.

Wilson bases his support on personal acquaintance with Spencer, having stayed at Althorp on multiple occasions and having heard directly from Spencer anecdotes that appear in the memoir. He cites specific incidents including an alleged telephone conversation in which Prince Charles said "We'll forget her soon enough," and an encounter at John Spencer's funeral where Prince Charles reportedly told the young, grieving earl "You're so lucky!" Wilson contextualises these claims within a broader portrait of King Charles as a man who spent decades waiting to become king, during which time his wife Diana captured public affection in a way that left him feeling sidelined and resentful.