Update:
Took the car to Allon White's yesterday (always a pleasure) to have the Short Shifter fitted, a nice morning with their breakfast club going on also.
What a difference! The shift is very very short and precise now, the action is much more positive and feels like a bolt action rifle. I am also very pleased to say this has reduced driveline shunt massively, you can feel much more relaxed when shifting and cruising and the shifts are much smoother as a result, whereas before to get a smooth shift you had to be rather brisk with your left arm!
It has totally transformed the car, and really helps it become a comfortable cruiser... which I tested by driving 160 miles to Surrey and back!

So a few pictures of the kit and the difference: