http://fedtrust.co.uk/our-work-on-europe/hard-brexit-international-trade-and-the-wto-scenario/
http://www.conservativehome.com/parliament/2016/04/theresa-mays-speech-on-brexit-full-text.html
https://www.youtube.com/watch?v=4ksdrYYUY2w&feature=youtu.be
https://publications.parliament.uk/pa/cm201719/cmselect/cmworpen/848/848.pdf