To follow up on my earlier post.
I have poked and prodded and wondered and thought and as far as I can see there is absolutely nothing in the design of the Girling handbrakes, used by Bristols and I believe others, e.g. Aston Martin, which are by nature unbalanced, to stop the inner handbrake pad resting lightly on the disc at all times. The handbrake cables, stretched or not, are connected to the operating lever that amplifies their effort at a point that is too close to the suspension point of the handbrake calliper to have any effect. And there isn't anything else to stop this phenomenon, as far as I can see.
I have to say that this strikes me as a rather astonishing state of affairs, even though the the pressure caused by the imbalance is pretty light it is still there and has to result in unnecessary wear on that pad, if one does a any sensible mileage.
Can anybody shed any light on my observation? I'm hoping that I'm wrong and the answer is "X". If there is an answer I'd be glad to know it.
By the way the "softer" pads I mentioned are fantastic, I actually have a proper handbrake now easily goes through the MOT and which might even stop the car in an emergency, but how they will wear remains to be seen
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