
https://www.niesr.ac.uk/sites/default/files/publications/NIESR%20Report%20Brexit%20-%202018-11-26.pdf

http://blogs.lse.ac.uk/brexit/2017/09/28/the-eu-referendum-was-gerrymandered/

https://www.nao.org.uk/wp-content/uploads/2017/07/The-Customs-Declaration-Service.pdf