. . . . "Royalty payments to the ex-Harrovian were suspended last year after a claim by Lukas Burton, a Los Angeles record producer, who said he co-wrote the tracks with Blunt when the singer was little more than a raw young talent embarking on a career in the music industry.Burton, who has worked with stars including Dido and Sir Paul McCartney, is seeking royalties for the tracks Goodbye My Lover, No" .