1. Yes it is. You should lodge a complaint against the police for their actions against you relative to what is essentially a civil matter. You are entitled to remove obstructions from a right of access to which you have right or title. 2. Not relevant in my view. The illegal obstruction had damaged your own property. 3. No. please fight fire with fire and lodge a complaint with the police. I hope that helps. Please leave a positive rating so that I am credited for my time.
You can use it as a precedent where the case shows that what that person did and what you did were treated as permissible by the court, therefore not a criminal offence. The complaint should be lodged in the first instance with the duty inspector usually but look up the particular website for that police force and you will get the correct procedure. You should point out that what you did is not recognised as a crime by the court in the precedent case. If it doesn't stop them you can't write to the court. You will have to meet the charges and go to trial.