https://publications.parliament.uk/pa/ld201719/ldselect/ldconst/69/69.pdf
https://publications.parliament.uk/pa/ld5801/ldselect/ldeucom/248/248.pdf
http://ukandeu.ac.uk/brexit-a-french-perspective/
https://blogs.sussex.ac.uk/uktpo/2018/12/17/organising-the-second-referendum/