Earl Spencer's forthcoming memoir 'Swan Song: Diana, My Sister' has ignited controversy with allegations concerning King Charles III's response to Princess Diana's death in 1997. According to Spencer, the then-Prince of Wales displayed what he characterises as indifference or satisfaction toward Diana's passing, reportedly using language suggesting pleasure and resignation about the tragedy. The publication has drawn criticism from royal supporters who contend that Spencer should have exercised restraint given the King's recent health challenges and current difficulties.

Defenders of Spencer's work argue that the memoir's contents are factually grounded and that the author was justified in bringing these claims into the public domain. Columnist A.N. Wilson has publicly backed Spencer's decision to publish, asserting that the book's allegations warrant consideration. The Palace has issued a formal response to the claims, continuing the broader conversation surrounding Diana's legacy and the various recollections of how her death was experienced and processed within the Royal Family.