https://www.gov.uk/government/news/david-davis-speech-to-the-suddeutsche-zeitung-economic-summit
https://www.opendemocracy.net/anthony-barnett/why-brexit-won-t-work-eu-is-about-regulation-not-sovereignty?utm_source=Daily+Newsletter&utm_campaign=84fcef5dd0-DAILY_NEWSLETTER_MAILCHIMP&utm_medium=email&utm_term=0_717bc5d86d-84fcef5dd0-407405485
https://www.publications.parliament.uk/pa/cm201617/cmselect/cmintrade/817/817.pdf
https://www.euronews.com/2018/09/25/why-is-the-irish-border-issue-so-complex-euronews-answers