https://www.socialeurope.eu/2017/07/road-soft-brexit/
https://www.parliament.uk/documents/commons-committees/culture-media-and-sport/Background%20paper%20-%202016%20Referendum%20Expenses%20Opinion%20-%20Matrix%20Chambers.pdf
http://www.epc.eu/documents/uploads/pub_7865_realitybites.pdf