https://www.socialeurope.eu/trump-and-brexit
https://publications.parliament.uk/pa/ld5801/ldselect/ldeucom/4/4.pdf
https://ec.europa.eu/commission/sites/beta-political/files/guiding-principles-dialogue-ei-ni_en.pdf
https://www.ft.com/content/b638551a-68c3-11e7-8526-7b38dcaef614