https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/836116/Explanatory_Note_Accessible.pdf
http://www.cobcoe.eu/files/cobcoe-brexit-report-september-2017-e-Y4G2st.pdf
https://ukandeu.ac.uk/the-rise-and-rise-of-a-new-majority-in-northern-ireland/?mc_cid=7c246b3886&mc_eid=815b1928ec