http://www.iata.org/whatwedo/Documents/economics/impact_of_brexit.pdf
https://www.nuffieldtrust.org.uk/files/2022-09/1662995727-nuffield-trust-new-horizons-web.pdf
http://www.icaew.com/-/media/corporate/files/technical/economy/brexit/eu-exit-charge.ashx
https://www.nscai.gov/wp-content/uploads/2021/03/Full-Report-Digital-1.pdf