https://ukandeu.ac.uk/wp-content/uploads/2021/03/Freeports.pdf
http://europa.eu/rapid/press-release_MEMO-17-2001_en.htm
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/635900/2017-08-07_DP_Bill_-_Statement_of_Intent.pdf
https://publiclawforeveryone.com/2017/06/10/does-the-salisbury-convention-apply-during-a-hung-parliament/