https://www.occrp.org/en/daily/12149-denmark-will-not-give-aid-to-companies-registered-in-tax-havens
https://www.tandfonline.com/doi/epdf/10.1080/13501763.2023.2231029
https://blogs.lse.ac.uk/brexit/2019/12/03/a-missed-opportunity-revisiting-the-euro-referendum-that-never-was-from-a-historical-perspective/
https://www.nao.org.uk/wp-content/uploads/2018/01/PFI-and-PF2.pdf