Britten Studio, Snape, SuffolkPart two of Harrison Birtwistle's Greek myth double bill lacks The Corridor's dramatic impact, but performers and production are exceptional and beautifully nuancedIn 2009, the Aldeburgh festival inaugurated a new flexible performing space, the Britten Studio, with the premiere of The Corridor, a specially commissioned theatre piece by Harrison Birtwistle that was a dramatic expansion of…