https://publications.parliament.uk/pa/cm201719/cmselect/cmworpen/848/848.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.conservativehome.com/platform/2017/05/what-would-wto-mean-andrew-stoler-and-geoff-raby-brexit-britain-has-no-need-to-fear-wto-terms.html