Diana's butler hasn't heard from Will and Harry

Princess Diana's former butler Paul Burrell has revealed that Diana's sons, Prince William and Prince Harry, haven't spoken to him since her tragic death.

Burrell has spoken of his upset at the lack of contact from the brothers in the interview on Australia's Channel 7 Sunrise programme.

"I haven't spoken to them since their mother died in 1997," he told the programme.

"But I'd love to speak to them.

"And I'd love to tell Kate about the incredible woman who changed all the rules to make her life more comfortable.

"To give her a better life as a royal. It's what Diana did."

Burrell hinted that it wasn't William and Harry's decision not to contact him.

"I don't know why (they haven't contacted me)," he said.

"(But) Think about the system. The whole establishment is up against me because I'm the outsider.

"I belong in Diana's world. I'm the one who got away.

"You've never heard me say anything disrespectful about the royal family or the Queen.

"We have a wonderful monarch. She's 91 on Friday, long may she reign."

Princess Diana continues to be revered well after her death.

Sunrise co-host Natalie Barr put it to Burrell: "She was viewed as a saint, she mustn't have been?" He agreed.

"She was flawed. She was incredible and unique and inspirational," he said.

Burrell said Princess Diana's battle with Royal protocol has allowed for Kate to be herself as a royal.

"She's not put a foot wrong. She is incredible," he said.

"She has something Diana never had, the love and support of a man who adores her. She can't go wrong."

Burrell said he also believes Harry and William are keeping Diana's legacy alive.

"I think they are wonderful," he said.

"They are following in their mother's footsteps. She had them for long enough to instil her hopes and dreams and ideals. They are now the product of Diana."