A strange and often intriguing biopic about a rock band formed around a pair of conjoined twins, Brothers of the Head is directed by Keith Fulton and Louis Pepe, previously best known for films about other people's movies, notably the evocative Lost in La Mancha, about Terry Gilliam's doomed attempt to film Don Quixote. No surprise, then, that this venture uses regular Gilliam writer Don Grisoni to adapt a Brian Alldiss graphic novel. No surprise either that there is a film-within-a-film, made by Ken Russell, one of this film's interviewees.

Almost everything else is a surprise, though: interviewing all the participants except its central duo, the film builds a believable and touching portrait of the era when pub rock was turning into punk with 1970s new wave producer Clive Langer providing credible music for the pair, played by identical (but not conjoined) twins Harry and Luke Treadaway. It doesn't all work but it's an intense experience with more in common with Dead Ringers than Stuck on You, though the menage a trois is an inevitable component here too. Of course, there has never been a rock band lead by conjoined twins, though some believe the Gallaghers were once joined at the eyebrow.