https://publications.parliament.uk/pa/bills/cbill/2017-2019/0005/18005.pdf
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/761852/05_December-_EU_Exit_Attorney_General_s_legal_advice_to_Cabinet_on_the_Withdrawal_Agreement_and_the_Protocol_on_Ireland-Northern_Ireland.pdf
http://ukandeu.ac.uk/cancelling-brexit-what-would-happen-if-we-changed-our-mind-about-leaving-the-eu/
http://www.businessforscotland.com/survey-scottish-business-loses-trust-uk-governments-brexit-negotiations/