https://blogs.lse.ac.uk/brexit/2021/05/17/brexit-is-a-political-ponzi-scheme/
https://publications.parliament.uk/pa/ld201719/ldselect/ldeucom/15/15.pdf
http://www.conservativehome.com/parliament/2016/04/theresa-mays-speech-on-brexit-full-text.html
https://www.publications.parliament.uk/pa/ld201617/ldselect/ldeucom/169/169.pdf