jezlewis, this must be such a hard time for you. I'm afraid I cannot give you legal advice on this matter. I think you should apply to the courts to stop your ex-wife from denying you access to your child, which is in effect what she would be doing by taking her to the US. As your little girl was born in the UK and you are British, I would think that her British nationality will override her US one. Joint nationality is always a tricky thing and many countries do not allow it in the first place. But taking her out of the country without your consent may well be illegal, even if it were just for a holiday. My daughter had to get consent from her nearly ex -husband when she wanted to take the kids to visit their grandfather in another country. If you apply to the courts to stop your daughter being taken abroad, they will consider it and may well make an order in your favour, especially as you have so far been a very active and involved, caring father. I would go to see a solicitor tomorrow morning and not waste any time in seeking a court order. What about applying for custody of your daughter yourself? Loving fathers can make great single parents, - just as great as loving mothers! Perhaps if you were in a position to do this, your ex-wife might think her plans through again and be a bit more considerate to both you and your daughter. 'In the interest of the child' the phrase the courts usually use ... does not mean robbing your daughter of a loving father. Your daughter does have rights ... as do you! I really hope this works out for you and you are able to keep seeing your daughter on a regular basis. My thought are with you as are my best wishes.