http://visual.ons.gov.uk/trading-places-uk-goods-trade-with-eu-partners/
http://www.fiscalcouncil.ie/wp-content/uploads/2017/06/Fiscal-Assessment-Report-June-2017-Final.pdf
https://www.ippr.org/files/2017-09/cej-interim-report-summary-170911.pdf
https://publications.parliament.uk/pa/cm201719/cmselect/cmcumeds/365/365.pdf