http://www.libdems.org.uk/brexit-challenge-justice#
https://researchbriefings.files.parliament.uk/documents/CBP-7212/CBP-7212.pdf
https://www.instituteforgovernment.org.uk/sites/default/files/publications/negotiating-brexit-preparing-talks-uk-future-relationship-eu-FINAL_1.pdf
https://publications.parliament.uk/pa/ld201719/ldselect/ldeucom/15/15.pdf