
https://www.instituteforgovernment.org.uk/sites/default/files/publications/5890%20IFG%20-%20Whitehall%20Monitor%202018%20web.pdf

https://www.otto-brenner-stiftung.de/fileadmin/user_data/stiftung/Aktuelles/AH93/AH_93_Haller_Web.pdf

http://news.sky.com/story/theresa-may-theres-no-economic-case-for-breaking-up-the-uk-10787816