https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/756374/14_November_Draft_Agreement_on_the_Withdrawal_of_the_United_Kingdom_of_Great_Britain_and_Northern_Ireland_from_the_European_Union.pdf
https://www.socialeurope.eu/2017/06/britains-deepening-confusion/
https://www.publications.parliament.uk/pa/ld201617/ldselect/ldeucom/116/116.pdf