http://fedtrust.co.uk/a-chaotic-brexit-is-still-a-possibility/
https://www.thetimes.co.uk/edition/news/irish-want-sea-border-with-uk-after-brexit-lvb6n35fq
http://The EU Won’t Help a Weakened Theresa May
https://blogs.lse.ac.uk/brexit/2019/10/09/northern-ireland-depends-on-the-eus-fluid-borders-for-survival/