https://www.lrb.co.uk/v39/n18/swati-dhingra/how-not-to-do-trade-deals
http://www.telegraph.co.uk/news/0/tory-dup-deal-agreement-full/
https://publications.parliament.uk/pa/ld201719/ldselect/ldeucom/63/63.pdf
https://ukandeu.ac.uk/long-read/the-protocol-post-brexit-northern-ireland/?mc_cid=9de7c359e6&mc_eid=815b1928ec