I first saw this rebooted version of the sixties musical back in 2016, when at the compact little Hope Mill Theatre in Manchester, director Jonathan O'Boyle first presented it on the stage. The intimacy of the venue, where you were never more than a few metres from all the cast, was perhaps one of its greatest impacts. So, in a space like the thousand-odd seater, Milton Keynes Theatre, the question is, does it still work? The answer is mostly yes. Hair first launched onto the stage in 1967, at the height of flower-power and more importantly for the, admittedly at times light story, the Vietnam War. These hippies are living it high, permanently and fighting the fight against that war, and all it represents. After fifty years, perhaps its relevance wains in that respect, but what we are left with is a kaleidoscopic collection of music and tripping theatre. There is no denying that Hair is an excellent show, but despite revelling in the original version of this version back in 2...