http://fedtrust.co.uk/the-2017-general-election-a-mandate-for-brexit/
https://ukandeu.ac.uk/wp-content/uploads/2022/09/UKICE-Levelling-Up-Report.pdf
https://policyscotland.gla.ac.uk/blog-sir-ivan-rogers-speech-text-in-full/
http://www.cesifo-group.de/portal/page/portal/DocBase_Service/studien/Studie-2017-Felbermayr-etal-Brexit-79843.pdf