Thank you for your question
My name is Clare
I shall do my best to help you but I need some further informtaion first
How old are the children?
Are they married?
Your friend can apply to the court for a Transfer of the tenancy into her sole name allowing her to force her ex to leave.
The form she needs is here
She can read more here
Please ask if you need further details
The only effective thing she can do is send evidence that she has issued the proceedings
Not at all.
She can and should issue proceedings immediately - she would be successful and it will not take long
I am only sorry I was not more clear the first time round!