Definitely report it. Explain to the witnesses how important it is keep your child safe. You need everything you can get.
Firstly, see a solicitor. They are super helpful, and will usually do an initial free consult.
Secondly, you are probably going to need to get into your house again. You need the paperwork, at the very least. It’s amazingly helpful that a lot is online now, but there will always be something. Womens aid can presumably advise on this, but DON’T do it alone. Take multiple people, and either the police or some other people who are experienced in dealing with violence and won’t be intimidated by him. Preferably men (not because women are any less capable of dealing with men like him if they have the skills and experience, but because men like him have no respect for women as people and are more likely to comply with men. It’s on him)
How is your housing sorted - rented, or mortgage? Talk to the landlord or the mortgage people and figure out a plan to get yourself off the tenancy, especially if it’s a mortgage. You need to protect your credit rating if you will want another mortgage in future. You may need to pay the mortgage, which will annoyingly protect his credit ratting, but he’s sitting pretty in the house, so can afford to hold that over you.
Find some money. You will need to get yourself set up in a new home, at least, and possibly take him to court. You will have to go through the charade of mediation, but with a man like that, it will be charade, because he doesn’t really believe he has done anything wrong (even if he pretends to be sorry to her what he wants now. Which is control over you)
Write him a letter telling him all this in purely factual, objective terms. Then block him. There is nothing useful to be had from communicating with him. He will spend literal years dragging the whole thing out and wildly swinging between being desperate to have you back, and wishing you dead. And everything in between. He simply can’t believe he doesn’t have the authority to choose whether you go or stay and will do anything to prove to himself he has power over you, it’s not (and never was) about you. There’s no point going up against someone like that. In your head he needs to be an abusive ex partner now. Don’t let him try and wheedle his way back in, or give him ammunition to make you angry. He can communicate with via your solicitor and the court mediation service. That will keep his bullying to a minimum or expose it. Either is desirable.
Personally I would stay 200 miles away. And I’d leave a key down there with someone you trust, too. If he turns up at yours and you need to get into the house, someone can do it then knowing he’ll be out for a while.
The only reason I would keep in contact is if you want or need the house or something in it and you don’t think there is any other way to get it. But I’d be VERY careful. Remember he believes he has absolute authority over you and your child, and you have defied him. This isn’t even a conscious belief, and he probably says otherwise, and justifies it by saying he is right and you are being irrational/mentally unstable/he needs you/you’re hormonal/he just loves you so much and wants what’s best for you blah blah blah. It is likely he will expect penance from you. He may even feel entitled to punish you. (Not necessarily physical violence, but possibly. Your defiance of his perceived authority may cause him to escalate). These beliefs are so fundamental to him, he won’t even be able to verbalise them, but they are there. I spent years dealing with this, and it would have been so much easier to just block him. Nothing useful came out the thousands of texts, it just held me back emotionally and used energy and time I could have spent starting over. I couldn’t block him because he had unsupervised contact with our child. Now, I would temporarily silence his texts etc, but you couldn’t do it back then. Believe me, he has nothing to say you need to hear, because he doesn’t actually believe you are an equal person to him.
Lastly, get some counselling. This is tough. I’m still dealing with it and it was 8 years ago, and mine wasn’t actually very abusive, mostly just controlling while pretending (I think also genuinely believing) he wasn’t.
Hang tough. Women can do hard things. You’ve got some tough months coming up, but if you put your energy in the right places, you can be rid of him and set up on your own with your child in 18 months, even with going to court over the house. Don’t communicate at all, do the paperwork the moment it hits your doormat and start over. You’ve done the hardest part, now it’s just seeing it through. Much love, and feel free to DM me if I can help.