Harry and Meghan launched a series of criticisms and allegations at the royal in a high-profile interview with Oprah Winfrey, aired when the late Queen was still alive.
After her passing in September 2022, they also took part in a bombshell docuseries for Netflix.
A few weeks later, the Duke’s explosive memoir, Spare, was released.
Royal expert Hilary Fordwich told Fox News: “It is unforgivable that Harry was the cause of much heartbreak for Queen Elizabeth II.
“All those around her knew of her sorrow and deep concern.
“This is the root of the massive rift between Harry and Meghan and the rest of the royal family. The pain they caused in the queen’s waning years can’t ever be repaired.
“The Family nor the nation will never forget it.”