Hi,
I assume you are not married. The advice would be different if you were.
Whose name is the property in? It is mortgaged? Who is paying the mortgage?
If it is in joint names is there any kind of Deed of Trust setting out shares and arrangements for selling in case of relationship breakdown?
You mention children. How old are they?
What is your reason for selling?
If you are not in a position to house the children, you could use the Children Act to get the right to stay put at least until the youngest is 18. You both have a responsibility to house the children. I don't think he would get very far with occupation rent..
Is he paying
child maintenance?
If you really want to sell and he won't agree, you may need to consider forcing the issue with an application to court. You need to talk to a solicitor.
Hadenoughnow