You could try phoning this number 08453021454, it`s the international liason dept - I had to phone them to stop my family allowance. I did try to call the child benefit office but they said because I was moving abroad I had to phone the above number. I did find find them very helpful though!:)
I've checked the website Rachel, thanks and I'll ring that no. tomorrow McMoo. Ali, I was hoping to still be able to get it as it will help BiL feed him, not a lot mind !!