
https://policyscotland.gla.ac.uk/blog-sir-ivan-rogers-speech-text-in-full/

https://www.nytimes.com/2017/05/29/opinion/britain-brexit-economy.html?_r=1

https://www.nao.org.uk/wp-content/uploads/2018/01/Implementing-the-UKs-exit-from-the-European-Union-the-Deparment-for-International-Trade.pdf