
http://www.ecfr.eu/article/commentary_the_brexit_threat_to_britains_defence_industry

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/868874/The_Future_Relationship_with_the_EU.pdf