You need evidence of all the times you reported him to the police. I contacted the officers in charge and got a short report from the police station briefly outlining what happened.
You need a non molestation order against this man also. Ex sat in court saying oh no I had no non molestation order made against me, I agreed not to go to my house out of the goodness of my non violent heart, despite there being a non molestation order in the evidence bundle to show the judge there was one (judge wasn’t impressed with the lie).
Have you got schools and GP’s who know what happened? Letters from all of them as evidence as to how the children have been affected.
In court be very clear what he did, you need to be graphic and ask for supervised contact at a contact centre only. Ask that he attend domestic violence intervention training. Repeat your afraid for the children and your lives.
Get yourself a very very good barrister if you’re in London there’s a really good judge who specialises in domestic violence cases, it took me several years before a judge with some common sense saw what was happening and immediately referred my children’s contact hearing to that judge instead.
Also speak to women’s aid and rights of women.
You need to get everyone and everything on side. And even then be prepared not to be believed and ripped apart by your ex’s barrister.
Keep all communication in writing and be very very reasonable but I would as a previous poster suggested spell out continuously the abuse you suffered but say inspite of you threatening to kill us after physically attacking our four year old we can move forward with child contact but you need help and the children need to be protected.
Be reasonable very reasonable and be prepared, you will be painted as a rabid bitch who is wildly angry for her ex leaving her even if it’s the opposite.