Yep, got a copy of that thank you! Have tested all diagnosis, and it hasn't worked sadly.
No power steering at all. Wheel is very heavy while stationary and at speed, although the faster I go the easier It did get to steer.
I have just had a turbo upgrade done tho, and the problem has only occurred since said upgrade. Given that I've been through a replacement rack & pump and still having issues, it could be related to this..