A collection of gowns, accessories and keepsakes that belonged to Diana, Princess of Wales, is set to go under the hammer.The sale is billed as the most extensive collection of Diana's personal belongings since she sold dozens of dresses at a New York charity auction in 1997, according to Julien's Auctions.A pair of gowns sold during that auction, two months before her death, will top the sale at The Peninsula Beverly Hills in Los Angeles on June 27.A Murray Arbeid midnight blue tulle strapless

A collection of gowns, accessories and keepsakes that belonged to Diana, Princess of Wales, is set to go under the hammer.The sale is billed as the most extensive collection of Diana's personal belongings since she sold dozens of dresses at a New York charity auction in 1997, according to Julien's Auctions.A pair of gowns sold during that auction, two months before her death, will top the sale at The Peninsula Beverly Hills in Los Angeles on June 27.A Murray Arbeid midnight blue tulle strapless gown that Diana wore twice in 1986 - to the Phantom Of The Opera premiere and to a dinner with King Constantine of Greece - and to a Royal Opera House performance of Cinderella in 1987 has an estimate of 400,000 US dollars (£315,000).A magenta silk and lace off-the-shoulder evening dress designed by Victor Edelstein, which Diana wore in London and Germany in 1987, has the same estimate.Martin Nolan, co-founder and executive director of Julien's Auctions, told the PA news agency: "People will kno