You’ll likely have the art of Higpnosis in your record collection, image-makers for whom no idea was too outlandish. The front covers of Led Zeppelin’s Houses Of The Holy, Pink Floyd’s Dark Side Of The Moon and Wings’ Band On The Run, to name but three, are all the work of the pioneering graphic design studio that bestrode ’70s rock like a pig over Battersea Power Station (another Hipgnosis landmark work, for the Floyd’s Animals). This doc, directed by photographer-turned-filmmaker Anton Corbijn (himself no slouch at sleeve design) features contributions from rock elder statesmen (Plant, McCartney, Gallagher (Noel), Gilmour) and, best of all, yarns aplenty from Hipgnosis co-founder Aubrey “Po” Powell.