http://fedtrust.co.uk/the-2017-general-election-a-mandate-for-brexit/
http://www.nfuonline.com/assets/96747
https://blogs.lse.ac.uk/brexit/2019/10/15/the-curve-of-inequality-and-the-brexit-way/
https://publications.parliament.uk/pa/cm201719/cmselect/cmpubacc/401/401.pdf