
https://ukandeu.ac.uk/wp-content/uploads/2022/10/UKICE-Northern-Ireland-Protocol-Bill.pdf

http://blogs.lse.ac.uk/brexit/2017/07/05/bloody-difficult-britain-has-already-blown-its-chances-of-a-good-deal-from-the-eu27/

https://www.instituteforgovernment.org.uk/sites/default/files/publications/IfG_Brexit_customs_WEB.pdf