Thanks again to All.

I note your comments on road camber etc, but the car goes left on acceleration on all surfaces - I will try it again though.

In addition to tyre pressures, worn tread - (inside front shoulders, rears fine), full Honda alignment check.

I would also add that when going round left hand bend and I lift off the accelerator the nose digs in and turns in quicker.

I've have had other thoughts as to cause including:-
Broken Right Rear Spring? - although no noise
Soft/failed damper (again right rear)
LSD - However if you think about it all cars send power to the wheel with least grip, but these don't pull to left or right normally.

 

That's called "lift off oversteer" and can get you in to a LOT of trouble!