Bit of an update, last month I changed out all the spark plugs, checked for water as mentioned but dry as a bone and also changed out all pencil coils. My friend reported that the car drove a lot better, but the hesitation problem still remained.
He described that when accelerator pedal is flat to the floor nothing happens for a few seconds, no engine note change, and then the car picks up speed. I initially thought it might be the fly by wire in the pedal or throttle body.
He has taken it to the few friendly garages who have run diagnostic checks, but still nothing. The only thing they found was a worn wire that comes out of the fuse box under the battery, this was rubbing on the body work, so the wire has now been repaired, im still waiting for friend to update me to see if problem persists.
