https://socialeurope.eu/brexit-why-does-northern-ireland-matter-so-much
https://ukandeu.ac.uk/wp-content/uploads/2021/02/UK-regulation-after-Brexit.pdf?mc_cid=1d4cf56e72&mc_eid=815b1928ec
https://www.ifs.org.uk/publications/10302
http://www.msn.com/en-gb/news/uknews/ftse-100-chiefs%e2%80%99-fury-at-no-10-letter-backing-ministers-on-brexit/ar-AArpKuh