https://policyexchange.org.uk/wp-content/uploads/2017/06/Defying-Gravity-A-critique-of-estimates-of-the-economic-impact-of-Brexit.pdf
https://www.adimblog.com/wp-content/uploads/2022/12/5.-Romeo_Flussi_DEF.pdf
https://conservativehome.com/2022/05/11/the-northern-ireland-protocol-the-options-boil-down-to-hoping-the-eu-backs-down-or-offering-it-a-new-deal/