Gucci tracksuit owned by Sir Elton John is expected to sell for thousands of pounds when it is put up for auction next month.Auction house Julien’s Auctions is hosting the MusiCares Charity Auction in Beverly Hills, California in September, where several artefacts belonging to famous figures from the music industry will be made available.MusiCares is a charity that was set up by the Recording Academy to provide support for people in the music industry.Proceeds from the auction, which is