"He's got involved with all my local shops up here trying to play Mr nice he goes on my local bakery and they all say to me what a Lovely guy he is he is misunderstood etc.if only they new."
This is normal. Abusers often have a very respectable public face - it's part of their smokescreen. Ignore that. People are wising up to it. Anyway, it's not your problem to solve.
As PP have said - this thread is terrifying for us just reading it so no wonder you can't think straight. You've had great advice about what to do. You have explained your reluctance about going to the police - which is that you think they look down on you and also that they will release him and you will need to go to court to get an injunction. And you don't want to have to tell your mum that you have been seeing this man. No doubt you don't want your ex to know either as you may lose access to your son altogether. But things have got beyond that. You do not want to pay with your life and, God forbid, your son's life over this. Far better to have to disappoint your mum and temporarily lose access to your son than for you and your son to be injured or murdered .
Firstly, the police's main desire will be to protect you and your son from this criminal. It really doesn't matter what they think of you (you may be wrong about that in any case - your relationship with this man has screwed up your perceptions so you're not seeing things straight). The police can come and take him away and they can keep him away. They can keep him in custody. If they release him on bail (which seems unlikely), they can impose bail conditions. They can also obtain a domestic violence protection order which will give you 28 days protection. Tell the police everything he has said and done. This is an opportunity for them to prevent a very serious crime taking place. They will want to take that opportunity.
Secondly, you might want to avoid the drama of him being arrested but that is better than the drama of the police being called to your place because he has injured or, worse, killed you and your son. He will have a longer prison sentence if he does those things. Also, if he harms your son, you may find yourself facing criminal charges and a prison sentence for failing to protect your son.
As PP have suggested:
- when your ex picks up your son, tell him that you need him to keep your son while you sort out the situation which has arisen;
- call the police from a safe place (e.g. in the shops near you);
- after the police have arrested him, take your cat, your important documents and go to your mum's.