Hi,
Have now identified the problem.
Disconnected the arm from the actuator and movement was very limited despite putting the car in garage for professional cleaning of turbo.!!
Worked the arm backwards and fwds and managed to free it off,obviously there was still some crud in the turbo!
Now working fine but need to clean turbo properly.
Read on forum that someone injected Mr muscle into turbo and that did the trick.
My only concern is that given the powerful effect of Mr muscle could it do any damage internally to the turbo.
Any thoughts??