Sir Elton John has been forced to cancel a string of concerts after contracting E.coli and an aggressive bout of influenza. The 62-year-old had already pulled out of a series of concerts in Dublin, London, Liverpool, Newcastle and Sheffield citing ill-health. But gigs in the U.S. cities of Seattle, Washington and and Portland, Oregon were yesterday shelved after the singer was admitted to hospital. Yesterday, a spokesman for Sir Elton was keen to play down reports of his condition, saying: 'He is recovering from a case of serious influenza with minor complications. We are confident he will be back on...