http://www.epc.eu/documents/uploads/pub_7576_northernirelandandbrexit.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/640485/Technical_note_on_Functionality_and_Protocol_7.pdf
https://www.politico.eu/article/eu-uk-relations-rishi-sunak-brexit/
https://ukandeu.ac.uk/wp-content/uploads/2021/03/Freeports.pdf