https://www.publications.parliament.uk/pa/ld201617/ldselect/ldeucom/116/116.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/665871/December_-_Joint_technical_note_on_the_comparison_of_EU-UK_positions_on_citizens__rights.pdf
https://www.socialeurope.eu/brexit-status-quo-ex-ante
https://www.youtube.com/watch?v=4ksdrYYUY2w&feature=youtu.be