Unusual fare last night at the Queen Elizabeth Hall: the UK premiere with Aurora Orchestra of Decasia, hailed as one of the most extraordinary and important cross-arts collaborations of the last decade.  Michael Gordon's score for amplified and partially detuned orchestra is played in front of Bill Morrison's dark and hypnotic film, and lasts just over an hour.  Landing somewhere between minimalism and punk, this is a bizarre and complicated soundworld –  especially from right in the middle of the orchestra!