https://blogs.lse.ac.uk/brexit/2019/10/23/long-read-the-makings-of-brexit-and-the-road-ahead/
https://www.global-counsel.co.uk/sites/default/files/special-reports/downloads/Global%20Counsel_Impact_of_Brexit.pdf
http://fedtrust.co.uk/the-2017-general-election-a-mandate-for-brexit/
http://blogs.sussex.ac.uk/uktpo/files/2017/11/Briefing-Paper-11.pdf