https://blogs.lse.ac.uk/brexit/2021/05/17/brexit-is-a-political-ponzi-scheme/
https://www.open-britain.co.uk/new_research_trade_deals_with_five_key_countries_could_take_26_years_to_negotiate
https://policyexchange.org.uk/wp-content/uploads/2017/06/Defying-Gravity-A-critique-of-estimates-of-the-economic-impact-of-Brexit.pdf
https://committees.parliament.uk/publications/40412/documents/197199/default/