To say Tunng have reinvented themselves on their new album ‘Turbines’ is a bit like remarking that Jay-Z has been doing a bit of rapping lately: flux defines them. Although the people making up the band are more or less the same as the lineup that first took the stage as a loose collective back in 2003, and there’s still a beating heart of “sci-fi pop”, the very sound and nature of the band shifts constantly.