Carmen by George Bizet is one of the most performed operas of all time. Why do people love this story? This film goes behind the scenes of three very different versions - the 2007 acclaimed production at Royal Opera House, Covent Garden, a 2005 film version shot in a South African township - U-Carmen eKhayelitsha, and a 2013 live TV version filmed in the centre of Bradford, 'Bollywood Carmen'. There is a heady mix of behind-the-scenes rehearsal footage, with unique access to…