
https://publications.parliament.uk/pa/bills/cbill/58-03/0204/220204.pdf

http://blogs.lse.ac.uk/brexit/2018/09/25/brexit-has-become-unnegotiable-theresa-may-has-a-constitutional-duty-to-admit-that-truth/

https://yougov.co.uk/news/2017/08/01/britain-nation-brexit-extremists/