https://www.rand.org/pubs/research_reports/RR2200.html
https://infacts.org/theresa-mays-flip-flops-u-turns/
http://www.bakermckenzie.com/-/media/files/insight/publications/brexit_tradeflows.pdf?la=en
http://www.ecfr.eu/page/-/Keeping_Europe_Safe_After_Brexit2.pdf