Well me andybish and another guy have been investigating the problem today. The intercooler has been off today. From what we could see we think its leaking water from the bottom banjo on the turbo.. It's hard up against the gearbox and looks bent so maybe its rubbed a hole in the pipe. Better than a headgasket failing I suppose but still a bit pissed as the turbo will need to be removed maybe a chunk of the box ground away and a new banjo fitting..