I would not trust the police to be on your side entirely. I was involved in an incident come time ago when a guy in a BMW M5 started honking at me. My reaction started off well, with my just ignoring him. However, at a set of traffic lights, I made the mistake of shouting W4NKER at him as I passed. This of course caused himto pursue me and knock me into a parked car. I decided not to have a chat and made my way into the local police station, unfortunately taunting him as I did so by stating that I had his face on camera.
The woman inside stated that I should call 101 and report it. To my dismay, the driver entered the police station just as I was leaving and said "This tw4t needs to learn how to ride" and I heard the woman at the counter say "Oh, are you the driver?". I didnt hang around to listen in.
When the police woman came to my house to see the footage and to get a statement. She had to review it 6 times to totally understand what happened. She said that as I swore at him and could have easily just ignored him, I caused a confrontation and as the camera was mounted on my handlebars, it was difficult to tell if I was hit or not because I was wobbling about a lot. She said the CPS would see both parties as bad as each other and possibly give both of us a Public Order Offence.
I wasnt happy with the outcome but it changed the way I look at incidents.