https://publications.parliament.uk/pa/cm201719/cmselect/cmniaf/329/329.pdf
https://blogs.lse.ac.uk/brexit/2021/01/11/article-16-of-the-ireland-northern-ireland-protocol-offers-no-quick-fix/
http://UK Brokenshire confirms no Executive in the ‘immediate term’ – Sinn Fein and the ...
https://docs.iza.org/dp16728.pdf