David Lloyd Jones, Lord Lloyd-Jones became a Justice of the Supreme Court in October 2017.

Lord Lloyd-Jones was born and brought up in Pontypridd, Glamorgan where his father was a schoolteacher. He attended Pontypridd Boys' Grammar School and Downing College, Cambridge. He was a Fellow of Downing College from 1975 to 1991. At the Bar his practice included international law, EU law and public law. He was amicus curiae (independent advisor to the court) in the Pinochet litigation before the House of Lords.

A Welsh speaker, Lord Lloyd-Jones was appointed to the High Court in 2005. From 2008 to 2011 he served as a Presiding Judge on the Wales Circuit and Chair of the Lord Chancellor's Standing Committee on the Welsh Language. In 2012 he was appointed a Lord Justice of Appeal and from 2012 to 2015 he was Chairman of the Law Commission.

Lord Lloyd-Jones is the first Justice of the Supreme Court to come from Wales.

Alison Young is the Sir David Williams Professor of Public Law at the University of Cambridge and a Fellow of Robinson College. Her main research interests are in public law, constitutional theory and human rights. Among her recent publications are Turpin and Tomkins’ British Government and the Constitution (CUP, 2021), Foundations and Future of Public Law (OUP, 2020, co-edited with Liz Fisher and Jeff King) and Democratic Dialogue and the Constitution (OUP, 2017). Alison co-edits the UK Constitutional Law Association Blog. Prior to moving to Cambridge, she was a professor of public law at the University of Oxford, where she received University prizes for excellence and innovation in teaching in public law. 

Mark Elliott is Professor of Public Law and Chair of the Faculty of Law at the University of Cambridge and a Fellow of St Catharine’s College. His main research interests are in constitutional and administrative law. Among his recent publications are Public Law (OUP 2020, co-authored with Robert Thomas) and Common Law Constitutional Rights (Hart 2020, co-edited with Kirsty Hughes). Mark is a recipient of a Pilkington Prize for Excellence in University Teaching, writes a widely read blog on public law, and from 2016 to 2020 served as Legal Advisor to the House of Lords Select Committee on the Constitution.