http://blogs.lse.ac.uk/brexit/2018/05/25/what-are-the-legal-aspects-of-packing-the-lords-with-brexit-friendly-peers/
http://www.voxeurop.eu/en/2017/eu-uk-relations-5120821
http://fedtrust.co.uk/views-from-the-federal-trust/free-movement-and-migration/