https://www.gov.uk/government/news/david-davis-speech-to-the-suddeutsche-zeitung-economic-summit
https://www.project-syndicate.org/commentary/brexit-in-reverse-by-george-soros-2017-06?utm_source=Project+Syndicate+Newsletter&utm_campaign=2200ecc304-sunday_newsletter_25_6_2017&utm_medium=email&utm_term=0_73bad5b7d8-2200ecc304-105765449
https://publications.parliament.uk/pa/bills/cbill/2019-2020/0007/20007.pdf
http://blogs.sussex.ac.uk/uktpo/files/2017/11/Briefing-Paper-11.pdf