http://www.consilium.europa.eu//media/32504/xt21004-ad01re02en18.pdf
https://www.tatler.com/article/rishi-sunak-chancellor-of-the-exchequer-feature
https://rusi.org/sites/default/files/briefingpaper-france-uk-2017.pdf
https://blogs.sussex.ac.uk/uktpo/2018/12/17/organising-the-second-referendum/