http://www.cer.org.uk/sites/default/files/insight_js_st_9.6.17.pdf
https://www.esri.ie/system/files/publications/RB202017_2.pdf
https://ukandeu.ac.uk/wp-content/uploads/2020/06/Mind-the-values-gap.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/680366/Technical_Note_-_International_Agreements_in_the_Implementation_Period_-_CLEAN.pdf