[Stuju]

Hi,
You would need your ex to sign a stat dec (we actually had an agreement drawn up by a solicitor which stated that my youngest daughter could reside with me anywhere in the world out of the duristriction of england and wales-an agreement is slightly different as you can both add in bits as long as you both agree) immigration were fine with the agreement i had as they are a stat dec. Not sure on court costs, but i do know depending on the age of the child sometimes the court will listen to the childs views & wishes.
Never heard of anyone being refused by a judge but guess theres always a risk abit like applying for a migration visa - nothing set in stone untill its approved
good luck
gizmo