As promised I have just picked car up from garage :- Fault code is same P2263 garage has spent many hours testing sensors & intake system for air leaks without any faults - removed actuator& found not sticking at time of test however they are saying that the turbo actuator should be replaced again ( this was replaced 17/07/13 & still under guarantee) I have to take their word because I have no knowledge of how the system works I'll have to do as requested & hope it solves the problem