Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
To give you a complete answer - how has the care of the children been shared until now, and how far away does the mother wish to go?
Both parents have Parental Responsibility and are entitled to have the children in their care and when they are with them take them away.
However if a parent does so then the other parent can apply for an Order that they are returned
It is clear that the father in this case has been the principal carer and he needs to make an urgent application for a Prohibited Steps Order to prevent any move until the court has decided whether or not the move is in the best interests of the children
This is done using a Form C100 available here
Please ask if you need further details
Sadly the police are not correct