This winds me up a lot. I'm disappointed that she settled out of court, but at least it is being reinvestigated.
I'm a keen photographer, and I get so angry when we are treated suspiciously - either potential terrorists or paedophiles usually - just for taking photos in a public place. Which is (bar a small handful of exceptions) entirely legal.
Your
legal rights are:
-You can take photos of anyone and anything in public (bar a couple of exceptions like military buildings. These should have clear signs)
-No-one has the legal right to demand you show them the photos on your camera, let alone insist you delete them (even if you are on private property they can only insist that you leave)
-You can take photos of any person in public (as there is no expectation of privacy in a public place), so long as you're not harassing them (I.E. don't chase them down the street or get right in their face)
Generally our police force is very good - but you do have to keep your eye on them.
As far as I can tell PCSO stands for Police Constable Shaped Object.