OP,
This is a deeply dangerous abusive man.
Your children are terrified and so are you.
Don't hand your children over to a man who terrifies you all.
Please step up.
Ring Women's aid.
Ring 102 and tell them your children are terrified after the scene on the street.
Ring your GP.
Ring the school and tell them what happened.
Get legal advice.
I would refuse him contact after today.
Tell him to go to court.
His abuse has driven you from your home and now he is terrorising you all.
Start making noise by calling the police and telling them about his abuse, stalking, harassment, frightening the children, screamingon the street.
Tell the police it is escalating with threats to you.
You need to fight him.
Let him go to court.
Create a paper trail of reports on him.
Stress your terror of him.
Stress the kids terror.
Give the authorities a chance to help.