Going to take time to pour over this at the weekend. The NIHRC and the IHREC have considered the question of citizenship under the DeSouza case. It proposes an amendment to the BNA that no assumption should be made as to the British Citizenship of a person born in NI. https://twitter.com/NIHRC/status/1250867832927260672

at a glance there are proposals to address issues with this. it's problematic on many levels. it will be unacceptable to many people for many understandable, obvious reason.