Buckingham Palace recently announced plans to celebrate Queen Elizabeth II’s Platinum Jubilee in 2022, marking 70 years on the throne, which will involve a four-day weekend of festivities. She will be the first monarch to cross the threshold, having already celebrated her silver, gold and diamond jubilees. Oliver Dowden, Secretary of Culture, said in June: “Her Majesty’s Platinum Jubilee will be a truly historic moment – and one that deserves an unforgettable celebration.

“We can all look forward to a special four-day Jubilee weekend, in which we will put on a spectacular show once in a generation that mixes the best of British ceremonial splendor with cutting-edge art and technology.

“It will bring the entire nation and the Commonwealth together in a fitting tribute to Her Majesty’s reign.

However, the Royal Mirror’s editor-in-chief Russell Myers warned that Prince Harry’s memoir could ‘torpedo’ the celebrations.

He said on the Podcast Save The Queen: “The fact [Harry’s book] will be released at the end of 2022, could it torpedo all of the platinum jubilee celebrations? Will he be invited back?

“What is happening with these books is that some of them are being followed, others are leaked. I saw a royal author tweet today that a knowledgeable source told him he would focus heavily on Diana and her death and whom he blames for her death.

“It hangs around and picks up a lot of old coals. I don’t think William will necessarily be happy about it as they have often said that they will do an interview about their mother’s death and her inheritance and that will be it.

” That’s why he [William] was so angry when he delivered this message about Panorama, that’s enough now. They’ve seen, read and heard enough. “

Announcing his deal with the Penguin Random House publishers, Prince Harry said it would reflect “the ups and downs” of his life and be “accurate and completely truthful.”

READ MORE: Prince Harry’s memoir will leave ‘no member of the royal family unscathed

The Telegraph recently reported that the palace is “afraid” of the explosive brief, suggesting it will not sign the post.

The Sun reported on Sunday that Harry would ask Princess Eugenie to help him with the book.

An insider said: “I could only imagine Eugenie speaking or being approached as she is someone Harry is still in regular contact with.”

Eugenie had a good relationship with Harry and his wife Meghan Markle. She met Meghan while living in New York City, and her husband Jack Brooksbank is also close to the former actress.