It may have taken her until 2005 to get her Wigmore Hall debut, until 2006 to break onto the stage of the Royal Opera House, but at 53 Susan Bullock has finally arrived, claiming the crown of soloist for this year’s Last Night of the Proms, a firm foothold at Covent Garden and her rightful place as Britain’s finest dramatic soprano. For a singer who “started singing by mistake”, whose musical training began in a council house in Cheshire on a piano rescued from the local rubbish dump, it’s no small achievement.