Thomas Horsley is a Senior Lecturer at the University of Liverpool. He completed his PhD thesis at the University of Edinburgh (2009-2011), funded by the UK Arts & Humanities Research Council. He was appointed Associated Head of Department in 2019.

Thomas specialises in EU and UK constitutional law with a particular focus on theorising the relationships between constitutions and institutions. He has published widely in leading international journals and edited collections. His first monograph, The Court of Justice of the European Union as an Institutional Actor: Judicial Lawmaking and its Limits, appeared with Cambridge University Press in 2018.  It interrogates the function of the EU Treaty framework as a source of normative restraint on the Court of Justice and, more specifically, its interpretative choices as an institutional actor within the Union legal order.