Ok. I recognise all these reasons to stay and put up with him. I’ve been there, done that as I said upthread.
You are using the school as a reason for not being able to do anything. I did this as mine were in a fabulous school. But, there are thousands of fabulous schools, and not necessarily in “the best” areas. You’ve been with your husband 11 yrs so the dc are young, not exam years. They can move school, it is not the end of the world.
Your job. Great it’s with council so you feel secure. But, it’s working nights so forcing you to stay. It’s low wage so not difficult to get the same wages elsewhere. You say you work all night then have the dc during the day, that is not sustainable with another baby without impacting on your physical and mental health. Our city council is cutting jobs at an alarming rate due to precarious finances so it’s not “a job for life” any more.
As a single parent you would probably get help with childcare costs ( I don’t know anything about how this works but others will).
If you were to move to the city your friends live would you have their support, better social life, easier transport, more job opportunities as it’s a city?
I’m jumping ahead but I’m hoping I’m helping you see none of these obstacles are real, and all can be sorted, and give you a better life. So please don’t get into the trap I did of making obstacles that aren’t real.
Please speak to Women’s aid or a local domestic charity. If you are not ready to speak to them, read their websites and follow links to other helpful websites.