Be honest enough, no police should be involved if they are anything like they are here for the simple fact there was no other foul play other than getting a beat down. We just made new friends and took care of the problem. Second I would relocate asap. How reliable is your friend? apparently he shoots off the mouth(which is not good in the street). Other than that stay in public places and in the daylight no night stuff if you can help it.
Good luck to you D, Ill pray that everything works out for ya. I've been there.(not UK but a similiar situation).