https://www.gov.uk/guidance/status-of-eu-nationals-in-the-uk-what-you-need-to-know
http://www.resolutionfoundation.org/app/uploads/2017/10/Changing-Lanes-3.pdf
http://www.resolutionfoundation.org/app/uploads/2018/02/IC-international.pdf
http://www.ips-journal.eu/regions/europe/article/show/divide-and-rule-2125/