https://publiclawforeveryone.com/2017/06/10/does-the-salisbury-convention-apply-during-a-hung-parliament/
http://www.finfacts.ie/Irish_finance_news/articleDetail.php?Brexit-Northern-Ireland-s-industry-eclipsed-by-Republic-s-after-1961-803
https://www.gov.uk/government/news/pms-european-council-press-statement-20-october-2017