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.

Thomas engages proactively with key stakeholders. In 2017, he was invited by the European People’s Party to speak at the European Parliament on the challenges of managing Brexit. He has previously given evidence to the House of Lords EU Select Committee (2015). His research also been cited in several UK Government reports. In 2014, he was appointed UK rapporteur at the XXVI FIDE Congress hosted by the University of Copenhagen. Thomas also regularly offers expert reaction to national and international media (incl. BBC News and CTV News) on major legal developments in EU and UK constitutional law.