Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
Who owns the flat?
has he spoken to Social Services regarding their approach to the situation at all?
She moved the boyfriend in?
Is he willing to start immediate divorce proceedings?
When were Social Services last involved?
Could he and the children stay with you for a little time while he is sorting things out?
He has Parental Responsibility for the children and the right to have the children in his care so he would not be breaking the law.
At the same time he needs to make an immediate application to the Court for a Child Arrangement Order stating that the children live with him - and an emergency Specific Issue order to ensure that she cannot remove the chidlren from his care.
This is done using a Form C100
He will also need to apply for a Transfer of the Tenancy within the financial side of Divorce proceedings
Please ask if you need further details
If you ask for me then I will deal with it as soon as I am online
You will not have to do so if all the sale proceeds are invested in a new home