https://ec.europa.eu/commission/sites/beta-political/files/position-paper-public-procurement_en.pdf
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/728135/THE_FUTURE_UK-EU_RELATIONSHIP.pdf
https://rusi.org/sites/default/files/newsbrief_37.3_elliott.pdf
https://uk.finance.yahoo.com/news/brexit-risk-destroying-uks-entrepreneurial-start-ups-warwick-business-school-151240554.html