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Richard Eden also went on to comment on the relationship between Prince Harry and Prince William who were both present for the unveiling of the statue.
He says that any friendliness between the pair was purely for the cameras, explaining: "Whatever discussions they've had between Harry and William whether it's about the football or whatever while Harry's here, they won't have been very serious.
"I mean William knows [that] without Meghan being there there's no point in discussing anything serious, because it will have to go through her anyway."
The brothers both attended the ceremony which was held in the gardens of Kensington Palace on 1 July. They both removed the green sheet which was covering the statue.
In a joint statement, the pair said it was an emotional day and a fitting tribute to their mother on her birthday.
It read: "Today, on what would have been our mother's 60th birthday, we remember her love, strength and character - qualities that made her a force for good around the world, changing countless lives for the better.
"Every day, we wish she were still with us, and our hope is that this statue will be seen forever as a symbol of her life and her legacy.
"Thank you to Ian Rank-Broadley, Pip Morrison and their teams for their outstanding work, to the friends and donors who helped make this happen, and to all those around the world who keep our mother's memory alive."
More than 100 visitors flocked to the Sunken Garden in the first hour of the statue's public unveiling on Friday, with some queuing to get in two hours before opening.
Royal family superfan Terry Hutt, 86, from Whaddon, Cambridgeshire, waited at the gates clad in a Union flag suit and top hat, and called the statue unveiling a 'dream come true'.
He said: "This statue is something we've been looking forward to for many years.
"I was one of the fortunate ones to meet Princess Diana. I was at St Bart's campaigning to save the hospital and she was opening a building for homeless people and she thought I was homeless.
"She sent me a nod and a few words. Ever since, I've always been around for her.
"I was surprised that in the statue she wasn't on her own, but again, I swallow my pride and I like what I see."
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