
https://www.nao.org.uk/wp-content/uploads/2018/10/The-UK-border-preparedness-for-EU-exit.pdf

http://www.coggs.polis.cam.ac.uk/news/forum-on-geopolitics-triple-bill-on-brexit

http://fedtrust.co.uk/our-work-on-europe/brexit-heading-to-a-deal-or-no-deal-while-uk-politics-implodes/