Róisín Áine Costello BL

Róisín is a practising barrister with a general practice and a particular interest in EU law, and data protection and privacy law.

In addition to her practice at the bar, Róisín is an Assistant Professor of EU and International Law at Trinity College Dublin.

Róisín is the author of ‘Privacy Law in Ireland‘ (Bloomsbury, 2023). She is also the co-editor of the forthcoming edited collections ‘Critical Reflections on the EU’s Data Protection Regime’ (Hart, 2024) and ‘Data Protection After Brexit: Reflections from the UK and Ireland’ (Hart, 2023).

Róisín is also the co-author (with James Kneale BL) of the forthcoming ‘The Data Protection Acts and the GDPR: A Commentary‘ with will be published by Bloomsbury in 2025.

A full list of publications can be found on the Trinity College Dublin Law School website.

• “Unauthorised access to data∶ some recent developments” Irish Centre for European Law Annual Data Protection Conference, Dublin 2024
• “EU Accession to the ECtHR: Implications for Data Protection and Privacy” University of Liverpool School of Law & Justice, 2023
• “Recent Developments in the Data Protection Jurisprudence of the CJEU” Media, Internet and Data Protection Bar Association Annual Conference, Dublin, 2023
• “Mixed data and the GDPR” Irish Centre for European Law Annual Data Protection Conference, Dublin 2023
• “Symbolism and Substance: Irish Language Rights in the 1922 Constitution” The Centenary of the 1922 Constitution, Dublin, 2022
• “The Expanding Scope of Privacy in European Law: Relational, Social, Contextual” Common Market Law Review Annual Conference, Dublin, 2022
• “Data Protection and Audio-Visual Recording of Police Interviews under the Law Enforcement Directive” Irish Council for Civil Liberties, Dublin, 2022
• “The CJEU Decision in GD v Ireland: Consequences for National and EU Law’ Irish Centre for European Law Annual Data Protection Conference, Dublin, 2022
• “Digital Constitutionalism – Questions and Coherence” 21^st Century Constitutionalism, EUI Florence, 2021
• “Political Economy in European Law and Policy” Society of Legal Scholars, Durham, 2021
• “The Official Languages Act: More than Performative Allegiance in Public Spaces?” Trinity College Centre for Constitutional Law & Governance, Trinity College Dublin, 2021

Irish Council of Law Reporting, 2024 – present

Irish Supreme Court Review, 2024 – present

Consulting expert on Irish law for the World Bank, 2015 – 2022

Board member, Irish Centre for European Law, 2020 – 2023