
https://ec.europa.eu/commission/publications/position-paper-transmitted-eu27-ongoing-police-and-judicial-cooperation-criminal-matters_en

https://researchbriefings.files.parliament.uk/documents/CBP-7212/CBP-7212.pdf

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