https://www.gov.uk/government/publications/information-about-the-withdrawal-bill
https://ukandeu.ac.uk/wp-content/uploads/2020/05/UKICE-Post-Brexit-Gov-NI-Report.pdf
http://ukandeu.ac.uk/cancelling-brexit-what-would-happen-if-we-changed-our-mind-about-leaving-the-eu/
https://sp-bpr-en-prod-cdnep.azureedge.net/published/2018/2/2/Common-UK-Frameworks-after-Brexit/SB%2018-09.pdf