The most telling thing about this latest episode, and the thing that should really make you think is:
The police were already there and waiting.
That pretty much confirms in my mind that their intention from the start was a PR exercise in appearing to be strict. They weren't there primarily to educate and inform the public and reduce instances of accidental transmission.
There were they simply to fine 'someone' for breaking the rules to make an example of for the local (and national) press.
There would be infinitely better ways to deploy police resources to actually educate, inform and police adherence to the guidance and rules, sending multiple officers to the local beauty spot to 'catch' a handful of people out for a walk is not one of them.
Heck, if that particular spot was really an issue for local mixing and transmission (I doubt it) they could even have had a better, more constructive, impact by simply manning the entrance and having a polite chat with anyone who turned up, explaining the guidance and asking people to go home and think about if their actions were appropriate or not. Handing out on the spot fines as a first action for minor (or perhaps not even actual) breaches does nothing but erode respect and trust in the local police.