
https://www.eia.gov/energyexplained/us-energy-facts/imports-and-exports.php

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/652285/Joint_Ministerial_Committee_communique.pdf

https://www.gov.uk/government/speeches/commonwealth-has-key-role-to-play-in-the-bright-future-for-britain-article-by-boris-johnson