
https://ec.europa.eu/commission/sites/beta-political/files/position-paper-public-procurement_en.pdf

http://www.resolutionfoundation.org/app/uploads/2017/10/Changing-Lanes-3.pdf

https://uk.reuters.com/article/uk-britain-eu-options/stairway-to-brexit-barnier-maps-out-uks-canadian-path-idUKKBN1ED23R