Well, I was going to do my garden and come back to the fray this evening, but it's raining again...
I think I will still save it until this evening, but can I echo glojo's appeal? Some people are getting too focussed on the MoK accident and its investigation. It is the most important example of what we are talking about, but it is not the point of what we are talking about.
The point is, I dislike the idea of "Police Primacy". I want to get to a better arrangement, though without much hope of making such a thing happen. I'll develop my Threshold idea this evening.