What is the ruling on a Muslim British aunt adopting her Algerian Muslim sister's son for the purpose of studying in Britain?

It is not permissible for the sister residing in Britain to adopt her sister's son, because this involves deceit and leads to corrupt consequences such as the mingling of lineages and the loss of rights, especially in a country that only recognizes official documents. This could lead to issues in inheritance and the mixing of the son with his maternal cousins. Furthermore, studying in a land of disbelief is not a religious necessity that permits adoption, and it carries its own risks.