http://UK Brexit And The Exterminating Angel
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/723460/CHEQUERS_STATEMENT_-_FINAL.PDF
http://blogs.sussex.ac.uk/uktpo/files/2017/11/Briefing-Paper-11.pdf
https://yougov.co.uk/news/2017/04/26/voting-intention-conservatives-45-labour-29-25-26-/