Well after some investigation it appears it not the stability control causing the issues I have. There apears no easy fix yet.
The tyres I have on the car, although the rolling distance is close (about 12mm), it is enough to bring difference in the speed of the tyres to a point where the traction control operates going around corners.
The setup in the the ford workshop computer won't let you customise the size for tyres
, it only allows tyres that are available on the car standard and the front and rear are the same size.
Warren