https://www.gov.uk/guidance/status-of-eu-nationals-in-the-uk-what-you-need-to-know
http://www.reuters.com/article/us-britain-eu-verhofstadt-idUSKBN19V0WP
https://www.esri.ie/system/files/publications/RB202017_2.pdf
http://fedtrust.co.uk/mrs-may-in-florence/