
https://visual.ons.gov.uk/commonwealth-trade-in-focus-as-uk-prepares-for-brexit/

https://ec.europa.eu/commission/sites/beta-political/files/financial-settlement-essential-principles-draft-position-paper_en.pdf

https://ukandeu.ac.uk/wp-content/uploads/2021/11/Brexit-and-Services-Trade-Working-Paper.pdf