Diana's tragic death robbed her of the chance to see her two sons grow up and start their own families. Had fate been kinder, she would now be the grandmother to five adorable grandchildren: George, Charlotte, Louis, Archie and Lilibet. The Duchess of York has no doubt Diana would have revelled in the role, claiming it would have been "her heaven".

       She told People magazine: "She would be very proud of her sons and their wives.

       "And she would be just like me, obsessed with her grandchildren.

       "Because that's what she loved."

       Fergie, a close friend to Diana throughout her life, added that she "adored my girls. She adored the boys."

       "This would be her haven. Her heaven," she said.

       Fergie and Diana became friends in their teenage years, well before they married in the Royal Family.

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       The two women shared a lot of the same friends and interests and would have lunch together once a week.

       When they both separated from their husbands in 1992, they still remained close.

       The pair would still meet for lunch, or the Duchess of York would take her daughters to Kensington Palace for tea with Diana and her two sons.

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       After their divorces were completed in 1996, the two went on holiday together to the South of France, accompanied by their children.

       Prince William and Harry unveiled a statue to their mother on July 1 - the day she would have turned 60.

       The two brothers released a joint statement expressing the importance of keeping their mother's memory alive.