7 of Princess Diana's explosive claims in BBC interview that tore royals in two

Watch: Princess Diana interview: Investigation into how BBC landed explosive interview expected to be published today

More than 20 years ago, Princess Diana sat down with Martin Bashir to give an interview which would tear the Royal Family apart.

Diana, then 34, uttered the now famous line "there were three of us in that marriage, so it was rather crowded" as well as disclosing that she had worked with Andrew Morton on a biography about her life.

The Panorama interview was broadcast in November 1995 and led to the Queen telling Prince Charles and Diana to divorce.

Earlier this year Diana's brother, Earl Spencer, shared details of meetings held with Bashir before the interview took place, which prompted a new BBC investigation into the circumstances of the interview.

According to The Telegraph, the BBC has found the veteran broadcaster guilty of deceit.

Here are some of the biggest claims Diana made during her interview.

She had post-natal depression

Diana revealed she had suffered with post-natal depression after the birth of William, her oldest son.

But she said she had received support.

She said: "It had been quite a difficult pregnancy - I hadn't been very well throughout it - so by the time William arrived it was a great relief because it was all peaceful again, and I was well for a time.

"Then I was unwell with postnatal depression, which no one ever discusses, postnatal depression, you have to read about it afterwards, and that in itself was a bit of a difficult time. You'd wake up in the morning feeling you didn't want to get out of bed, you felt misunderstood, and just very, very low in yourself."

Asked if it was out of character, she said: "Yes, very much so. I never had had a depression in my life.

"But then when I analysed it I could see that the changes I'd made in the last year had all caught up with me, and my body had said: 'We want a rest'."

Read more: How Prince Harry became a mental health champion

She said she had a "great deal" of treatment, and added: "I knew in myself that actually what I needed was space and time to adapt to all the different roles that had come my way. I knew I could do it, but I needed people to be patient and give me the space to do it."

She said people in the family referred to her as "unstable" and "mentally unbalanced" after the diagnosis.

Diana revealed self-harm and bulimia

As she spoke about her postnatal depression she was asked if it was true she had harmed herself, which she said she had.

Diana said: "I just hurt my arms and my legs; and I work in environments now where I see women doing similar things and I'm able to understand completely where they're coming from.'

She added: "I didn't actually always do it in front of him [Charles]. But obviously anyone who loves someone would be very concerned about it."

She was then asked if reports she had bulimia were true, which she also confirmed.

She said: "I had bulimia for a number of years. And that's like a secret disease.

"You inflict it upon yourself because your self-esteem is at a low ebb, and you don't think you're worthy or valuable. You fill your stomach up four or five times a day - some do it more - and it gives you a feeling of comfort.

"It's like having a pair of arms around you, but it's temporarily, temporary. Then you're disgusted at the bloatedness of your stomach, and then you bring it all up again.

"And it's a repetitive pattern which is very destructive to yourself."

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Responding to how often she would do it, she revealed: "If I'd been on what I call an awayday, or I'd been up part of the country all day, I'd come home feeling pretty empty, because my engagements at that time would be to do with people dying, people very sick, people's marriage problems, and I'd come home and it would be very difficult to know how to comfort myself having been comforting lots of other people, so it would be a regular pattern to jump into the fridge.

"It was a symptom of what was going on in my marriage.

"I was crying out for help, but giving the wrong signals, and people were using my bulimia as a coat on a hanger: they decided that was the problem - Diana was unstable."

Watch: Princess Diana's funeral footage appears in Prince Harry's The Me You Can't See trailer

She knew Charles and Camilla had renewed their relationship

Crediting a "woman's instinct" Diana said she had known that Charles and Camilla had restarted their relationship in 1986, which had been revealed in the 1994 biography of Charles written by Jonathan Dimbleby.

The biography had been effectively signed off by Charles.

She said: "By the change of behavioural pattern in my husband; for all sorts of reasons that a woman's instinct produces; you just know.

"It was already difficult, but it became increasingly difficult."

She said she was isolated from people at that time.

In the most famous line in the interview, asked if Camilla was a factor in the breakdown of her marriage, she said: "Well, there were three of us in this marriage, so it was a bit crowded."

She cooperated on the Andrew Morton biography

In 1992, a biography about Diana had been released, by Andrew Morton, and she confirmed she had helped with it.

She had never met Morton, but had sent him recordings, which he then used to put together the book.

She said she allowed close friends to talk to him too.

Speaking of the effect of the book, she said: "Well, what had been hidden - or rather what we thought had been hidden - then became out in the open and was spoken about on a daily basis, and the pressure was for us to sort ourselves out in some way.

"Were we going to stay together or were we going to separate? And the word separation and divorce kept coming up in the media on a daily basis."

Diana broke it to William that Charles had been unfaithful

Diana revealed she had travelled to Prince William's school and told him that his father had confessed to being unfaithful, when the Dimbleby book was set to be released.

She said: "I went to the school and put it to William, particularly, that if you find someone you love in life you must hang on to it and look after it, and if you were lucky enough to find someone who loved you then one must protect it.

"William asked me what had been going on, and could I answer his questions, which I did.

"He said, was that the reason why our marriage had broken up?

"And I said, well, there were three of us in this marriage, and the pressure of the media was another factor, so the two together were very difficult.

"But although I still loved Papa I couldn't live under the same roof as him, and likewise with him."

She was in love with James Hewitt

Diana confirmed she had been in love with James Hewitt, who she had an affair with while married to Charles.

But she said she had been hurt by the revelations made in Anna Pasternak's book, Princess in Love.

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She said: "He was a great friend of mine at a very difficult, yet another difficult time, and he was always there to support me, and I was absolutely devastated when this book appeared, because I trusted him, and because, again, I worried about the reaction on my children.

"And, yes, there was factual evidence in the book, but a lot of it was, comes from another world, didn't equate to what happened."

She added: "Yes, I adored him. Yes, I was in love with him. But I was very let down."

She didn't think Charles could be king

Diana also raised concerns about whether Charles would be a good king in the explosive interview.

She said: "There was always conflict on that subject with him when we discussed it, and I understood that conflict, because it's a very demanding role, being Prince of Wales, but it's an equally more demanding role being King.

"And being Prince of Wales produces more freedom now, and being King would be a little bit more suffocating. And because I know the character I would think that the top job, as I call it, would bring enormous limitations to him, and I don't know whether he could adapt to that."

She hinted her son William should be king instead of Charles, though did not directly commit to that as her view.

Asked if William should be king, not Charles, she said: "My wish is that my husband finds peace of mind, and from that follows others things, yes."

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