http://fedtrust.co.uk/our-work-on-europe/hard-brexit-international-trade-and-the-wto-scenario/
https://rusi.org/sites/default/files/briefingpaper-france-uk-2017.pdf
https://publications.parliament.uk/pa/bills/cbill/58-03/0204/220204.pdf
http://www.nfuonline.com/assets/96747