i cant believe your brother can actually not want anything to do with his daughter, you hear of men that dont want contact because they dont want to pay maintanance, but if he is already payin it then why not play a role in her life and face his responsibilities. but if he is worried that she will come back demanding all the maintanance, then why dont ur brother put the money in a savings account every month as a back up.
if your brother has said he wants nothing to do with the child then i think fair play to the mother i wud
move away aswell what givesyour brother the rights to try and dtop them going when they want to go, when he dont care for this little girl anyway.