Jo Carby-Hall is Professor of Law and Director of International Legal Research in the Centre for Legislative Studies, Faculty of Business, Law and Politics, at the University of Hull, UK. Aneta Tyc is Dr. habil. of Law, Professor at the University of Lodz, employed in the Faculty of Law and Administration, Department of European, International and Collective Labour Law, Poland. Zbigniew Góral is Professor of Law who retired in 2021 from the University of Łódź, Poland.