
https://publications.parliament.uk/pa/bills/cbill/58-03/0204/220204.pdf

https://www.theatlantic.com/international/archive/2020/09/britain-brexit-humbling/616343/

http://blogs.lse.ac.uk/brexit/2018/05/15/switzerland-wanted-more-immigration-controls-but-economic-self-interest-will-probably-prevail/