Stay Ahead,Stay Informed Sign up for free, exclusive advice on divorce and relationships from our lawyers, divorce coaches and relationship experts. If you and your ex have an informal arrangement for your child, for example verbal agreements or a parenting plan, they will need to seek your permission before they take the child on holiday abroad. If the child arrangements order says that the child lives with one parent, that parent can take the child abroad without permission for up to 28 days. Why do I need permission from my ex to travel abroad with our children? Many people ask whether they can take their child on holiday within the UK without the permission of their ex.