I live in a rough area. Ive just witnessed and filmed a fight outside my house, 2 blokes having a fist fight then 1 produced a hammer and bleed the other chap 4/5 times. Think he was struck on the arm. Then it stopped and the hurt bloke ran up the street. Should I phone 101 after the fact? Would there be a point? Also I would be concerned that it was easy identifiable that it was filmed and recorded from my house and that it would "get out" so to speak. I still have to live here and I have 2 young children to think about!