The response to this sort of thing is so variable. I filled in an online report to Avon and Somerset Police on some prick who chucked a cup at my car. I got a follow up phone call to discuss it then a written report after they’d tracked the bloke down and had a word. I was pretty surprised to be honest, I just wanted something to be recorded in case he made a habit of it. No dashcam footage or independent witness asked for, so I must be plausible on the phone!
I was physically assaulted & pushed off my bike, when I reported it to Devon & Cornwall Police they said they phoned them to have a word, but they denied it, so didn’t do anything. My GF who was with me at the time, didn’t count as a witness…