https://publications.parliament.uk/pa/cm201719/cmselect/cmniaf/329/329.pdf
http://ukandeu.ac.uk/cancelling-brexit-what-would-happen-if-we-changed-our-mind-about-leaving-the-eu/
https://www.bloomberg.com/news/articles/2017-06-14/ryanair-easyjet-say-soft-brexit-won-t-address-airline-concerns?cmpid=BBBXT061517_BIZ&utm_medium=email&utm_source=newsletter&utm_term=170615&utm_campaign=brexit
https://publications.parliament.uk/pa/cm201719/cmselect/cmhaff/421/421.pdf