https://www.nao.org.uk/wp-content/uploads/2017/07/The-Customs-Declaration-Service.pdf
https://institute.global/news/brexit-realities-taking-back-control
https://www.theguardian.com/environment/2017/jul/19/uk-threatens-to-return-radioactive-waste-to-eu-without-nuclear-deal
https://www.opendemocracy.net/uk/peter-geoghegan/growing-up-on-border-on-brexit-s-irish-problem?utm_source=Daily+Newsletter&utm_campaign=b906170335-DAILY_NEWSLETTER_MAILCHIMP&utm_medium=email&utm_term=0_717bc5d86d-b906170335-407405485