https://www.bbc.com/news/world-europe-52537573
https://www.europarl.europa.eu/doceo/document/TA-9-2021-0430_EN.pdf
http://hmics.org/sites/default/files/publications/HMICS20170621PUB.pdf
http://blogs.lse.ac.uk/brexit/2017/07/06/the-1bn-bung-wont-protect-northern-ireland-from-the-pain-of-a-hard-brexit/