https://cdn.obr.uk/March-2020_EFO_presentation_slides.pdf
https://www.esri.ie/system/files/publications/QEC2022WIN_0.pdf
https://gabriel-zucman.eu/files/TWZ2020b.pdf
https://ukandeu.ac.uk/wp-content/uploads/2020/10/UK-internal-Market-Bill-devolution-and-the-union.pdf