https://committees.parliament.uk/publications/40412/documents/197199/default/
https://www.hansardsociety.org.uk/publications/briefings/who-chooses-the-scrutineer-why-mps-should-resist-the-governments-attempt-to
https://www.brookings.edu/wp-content/uploads/2017/09/4_alganetal.pdf
https://ec.europa.eu/commission/sites/beta-political/files/slides_on_uk_technical_note_on_temporary_customs_arrangements.pdf