http://www.europarl.europa.eu/RegData/etudes/STUD/2017/602028/IPOL_STU(2017)602028_EN.pdf
https://www.opendemocracy.net/uk/sunny-hundal/theresa-may-is-getting-around-election-spending-limits-with-big-newspaper-ads?utm_source=Daily+Newsletter&utm_campaign=eac641dffa-DAILY_NEWSLETTER_MAILCHIMP&utm_medium=email&utm_term=0_717bc5d86d-eac641dffa-407405485
http://www.cer.org.uk/sites/default/files/insight_JS_9.5.17.pdf
http://www.standard.co.uk/news/politics/boris-johnson-backed-by-ukip-in-general-election-a3530371.html
http://www.standard.co.uk/news/politics/george-osborne-quits-as-mp-saying-he-is-leaving-westminster-for-now-a3518001.html
http://news.sky.com/story/theresa-may-theres-no-economic-case-for-breaking-up-the-uk-10787816
https://uk.yahoo.com/news/wales-could-disappear-england-under-213835584.html
https://yougov.co.uk/news/2017/04/26/voting-intention-conservatives-45-labour-29-25-26-/
https://www.bloomberg.com/politics/articles/2017-04-26/brexit-risks-opening-pandora-s-box-of-trade-disputes-for-britain?cmpid=BBBXT042617_BIZ&utm_medium=email&utm_source=newsletter&utm_term=170426&utm_campaign=brexit
https://www.bloomberg.com/politics/articles/2017-04-11/brexit-means-scots-need-to-make-informed-choice-sturgeon-says