Photo of Professor Thomas Horsley

Professor Thomas Horsley LL.B (Hons), LL.M, PhD (Edinburgh)

Professor of Constitutional Law Law


Research Overview

Thomas specialises in constitutional law with a particular focus on the UK and EU legal systems. His research expertise also covers EU internal market law, including, the free movement of capital; the Court of Justice of the EU; comparative constitutional law and constitutional theory.

UK Constitutional Law

Thomas's most recent work, and future research agenda, is focussed on analysing the conceptual foundations of the UK constitution and the unfolding impact of the UK's withdrawal from the EU on key aspects of the UK constitution.

European Union Law

Key areas of expertise: (1) the Court of Justice of the European Union; (2) EU internal market law - in particular: the free movement of capital and goods; (3) Union citizenship and UK implementation of EU citizenship rights; and (4) general principles of EU law - in particular: subsidiarity and EU fundamental rights.

Comparative Constitutional Law

Thomas is a Research Fellow on a collaborative project on constitutional transplants hosted by the IIAS, Jerusalem.

Research Group Membership

Research Grants

Enhancing Stakeholder Understanding of the United Kingdom Internal Market Act 2020 and its Impact on Welsh Law


September 2023 - February 2024