http://www.epc.eu/documents/uploads/pub_7576_northernirelandandbrexit.pdf
https://publications.parliament.uk/pa/cm201719/cmselect/cmpubacc/401/401.pdf
https://publications.parliament.uk/pa/cm201719/cmselect/cmworpen/848/848.pdf
https://blogs.sussex.ac.uk/uktpo/2017/09/01/the-eu-regulatory-magnet/