https://ec.europa.eu/commission/sites/beta-political/files/position-paper-public-procurement_en.pdf
https://ec.europa.eu/commission/sites/beta-political/files/outline_of_the_political_declaration.pdf
https://blogs.lse.ac.uk/brexit/2021/01/11/article-16-of-the-ireland-northern-ireland-protocol-offers-no-quick-fix/
https://www.instituteforgovernment.org.uk/printpdf/10590