
https://www.theguardian.com/politics/2017/nov/10/brexit-date-is-not-irreversible-says-man-who-wrote-article-50-lord-kerr

https://www.socialeurope.eu/brexit-status-quo-ex-ante

https://www.instituteforgovernment.org.uk/sites/default/files/publications/voting-on-brexit-report-final.pdf