https://www.gov.uk/government/news/david-davis-speech-at-ubs
https://ec.europa.eu/commission/sites/beta-political/files/guiding-principles-dialogue-ei-ni_en.pdf
https://www.gov.uk/guidance/status-of-eu-nationals-in-the-uk-what-you-need-to-know
https://policyexchange.org.uk/wp-content/uploads/2017/07/Farming_Tomorrow.pdf