Ed Sheeran performing in his school production of the musical Grease is going up for auction, offering a rare look at the singer before global fame beckoned.The film, which is nearly two hours long, shows a 15-year-old Ed portraying the character Roger.Sporting a leather jacket and slicked-back hair, Sheeran delivers a solo rendition of the track ‘Mooning’ in the video.The recording is now being sold by Omega Auctions, which has shared a preview clip of the performance ahead of the June 29