https://blogs.lse.ac.uk/brexit/2019/10/23/long-read-the-makings-of-brexit-and-the-road-ahead/
https://www.cnas.org/publications/podcast/luke-coffey-on-brexit-and-the-future-of-the-special-relationship
https://institute.global/news/customs-and-exiting-european-union
http://www.voxeurop.eu/en/2017/eu-uk-relations-5120821