https://rusi.org/sites/default/files/newsbrief_37.3_elliott.pdf
http://www.cer.org.uk/sites/default/files/insight_JS_9.5.17.pdf
http://www.oxera.com/Latest-Thinking/Publications/Reports/2017/Brexit-ports.aspx
https://www.socialeurope.eu/brexit-can-be-stopped-but-the-window-of-opportunity-is-closing-fast