Princess Diana's former butler Paul Burrell has said that Prince Harry has "lost the plot" and has forgotten his "loyalty" to his family.
The 64-year-old joined Lorraine on the sofa to speak about being diagnosed with prostate cancer, during which time he admitted fearing he wouldn't live until next Christmas.
He also spoke about his thoughts on Prince Harry's memoir Spare, which sees the royal lift the lid on his family and life experiences.
In a section of the book, Harry refers to Paul as "mummy's butler" and said accused him of "milking" Diana's death for money in a tell-all book.
Paul had drawn criticism when he penned A Royal Duty in 2003, which led to the release of a statement by the brothers from Clarence House at the time accusing him of "a cold and overt betrayal".
However, Paul insisted that Prince Harry's anger towards him in his recent memoir, released earlier this month, had left him "bewildered".
"I was bewildered by it because he's known me all his life as Paul," he told Lorraine.
"He knew what I did for his mother - he knew how much i loved her and protected her memory, he knows all of that.
"Why did he call me mummy's butler? Why couldn't he have come to me personally and said he wasn't happy with the situation?"
"I've always defended him until the last minute and now I think, 'you've lost the plot'," he told Lorraine.
In his memoir, Harry said that Paul releasing the book had "made his blood boil".
Harry said that he first caught wind of the book when he was working as an unpaid farmhand in Australia when he was 19 in 2003 after leaving Eton.
He wrote: "Mummy's former butler had penned a tell-all which actually told nothing."
"It was merely one man's self-justifying, self-centring version of events. My mother once called this butler a dear friend, trusted him implicitly. We did too. Now this," Harry added.
"He was milking her disappearance for money. It made my blood boil."
Harry said that he wanted to fly home to "confront" Paul, but was stopped by King Charles, who talked him out of it and insisted that all they could do was "issue a united condemnation".
Speaking about how he feels about Harry now he has a new life in America, he said: "What's happened? There's been a shift in that young man that I know so well and he's changed I'm saddened by it."
Do you enjoy reading about celebrities? Sign up for all the best celeb news from the Mirror here .
"Harry comes from a very different place [to me] - a very privileged world.
"He's forgotten the words loyalty, duty, respect to his country, to the people of his country and to his family.
"So my mental health has taken a bashing - does he not consider that? Or the mental health of anybody he writes about?"
Do you have a story to sell? Get in touch with us at webcelebs@mirror.co.uk or call us direct 0207 29 33033.
