http://www.bakermckenzie.com/-/media/files/insight/publications/brexit_tradeflows.pdf?la=en
http://openeurope.org.uk/today/blog/will-brexit-ground-flights-europe/
https://publications.parliament.uk/pa/ld5801/ldselect/ldeucom/4/4.pdf
https://blogs.sussex.ac.uk/uktpo/2017/09/01/the-eu-regulatory-magnet/