// The Police have always stopped cars outside areas.//
Yes, I've heard you and other say this before, but as far as I can see this just means that there's a different problem, the one I highlighted before: namely, why is the mere presence of a vehicle, famously able to move people over large distances, a large distance away, enough to justify a stop -- not to mention the interrogative line of questioning that follows it? Never mind the fact that this turned out to be a mistake. It seems to me that if the incident started because of an error, and continued because of a lack of quality control, then basic procedures will still need to be reformed to ensure that the police aren't taking action for no reason. Which, after all, is a waste of everybody's time concerned, not least the police's.
As I understand it, Butler herself had no complaints about the conduct of the police during the incident, and that's something to be thankful for.