Filming a music biopic is probably the most fraught type of film-making and Tinseltown is littered with both half-decent, half-crap efforts and rubbish ones. You need access to the music, which if your star has passed means access to the family or estate, and who holds the power in the families or estates of dead famous people seems to result from a process of natural selection more ferocious than any Darwin imagined, favouring high levels of greed, pettiness, possessive jealousy or reclusiveness. Thus there are no good films about the Beatles or Stones except