
http://blogs.lse.ac.uk/brexit/2018/07/09/british-influence-in-brussels-had-been-far-greater-than-recognised/

https://www.chba.org.uk/for-members/library/overseas-seminars/the-status-of-gibraltar-under-eu-law

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/224244/evidence-british-influence.pdf