Earl Spencer, the brother of Diana, Princess of Wales, has spoken openly about his continued grief for his late sister, stating he misses her "every day." The admission comes as his new book, "Swan Song: Diana, My Sister," is set to be published.

In an interview with the BBC, Spencer described the profound and lasting impact of sibling loss, noting that "you never get over it." This sentiment underscores the personal motivation behind his forthcoming book, which is expected to offer a critical perspective on the Royal Family.

Spencer explained that the title "Swan Song" signifies his "final word" on the subject of his sister and her life. He emphasized that the book is intended as a "celebration of her," rather than a platform for ongoing commentary. He indicated that this is his "sign off as Diana's brother and final take on the situation."

The full interview, titled "Princess Diana: My Sister's Story," is available on BBC iPlayer and was scheduled for broadcast on BBC One. The book's imminent release has generated significant interest, particularly given its anticipated critical stance towards the Royal Family.

While the book is framed as a celebration, its expected critical elements suggest it may revisit unresolved questions surrounding Diana's life and death. Spencer's previous public statements have also touched upon sensitive topics, including alleged critical remarks made by King Charles after Diana's passing.

The timing of the book's publication and Spencer's candid remarks highlight a continued public fascination with Princess Diana and the dynamics of her relationships, including those within the Royal Family. His role as a close family member provides a unique, albeit personal, vantage point.

"Swan Song: Diana, My Sister" is due to be published on Tuesday. Its contents are anticipated to offer a deeply personal account, shaped by Spencer's enduring connection to his sister and his reflections on her legacy.

The public discourse surrounding Princess Diana remains active, with new perspectives and analyses continuing to emerge years after her death. Earl Spencer's contribution is expected to add another layer to this ongoing narrative.