https://committees.parliament.uk/publications/8781/documents/88926/default/
https://www.ips-journal.eu/topics/foreign-and-security-policy/bye-bye-blue-helmets-7326/
https://ec.europa.eu/commission/publications/position-paper-transmitted-eu27-ongoing-police-and-judicial-cooperation-criminal-matters_en
http://ukandeu.ac.uk/brexit-a-french-perspective/