Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
What is the immigration status of the father of the children
Have you applied for Child Maintenance from him?
The only person entitled to apply for the benefits is your ex.
You can apply to the Child Maintenance Service for them to assess Child Maintenance
I hope that this is of assistance - please ask if you need further details
You will have to make a separate application under the Children Act - but if you do do your ex may use it to apply for contact with the children
You can apply to the Family Court for a Specific Issue Order for the return of the passports using a Form C100
However if you make that application then at the same hearing your ex can apply for a Court Order allowing him to have contact with the children