https://www.gov.uk/government/news/pms-open-letter-to-eu-citizens-in-the-uk
https://lif.blob.core.windows.net/lif/docs/default-source/default-library/170427-final-trade-blueprintweb.pdf?sfvrsn=0
https://bdi.eu/media/user_upload/20171005_Pressemitteilung_Brexit.pdf
https://www.gov.uk/government/news/david-davis-opening-remarks-at-the-start-of-the-third-round-of-eu-exit-negotiations