https://www.sussex.ac.uk/webteam/gateway/file.php?name=briefing-paper-1.pdf&site=18
https://yougov.co.uk/news/2017/04/26/voting-intention-conservatives-45-labour-29-25-26-/
https://waitingfortax.com/2017/05/29/sometimes-you-try-and-you-do-not-succeed/?cmpid=BBBXT053017_BIZ&utm_medium=email&utm_source=newsletter&utm_term=170530&utm_campaign=brexit
https://www.politico.eu/article/spain-and-uk-reach-eleventh-hour-deal-to-avoid-a-hard-border-in-gibraltar/