
https://www.gov.uk/government/news/david-davis-closing-remarks-at-the-end-of-the-fourth-round-of-eu-exit-negotiations-in-brussels

http://www.iata.org/whatwedo/Documents/economics/impact_of_brexit.pdf

https://www.socialeurope.eu/wp-content/uploads/2018/05/BP1-Devolution.pdf