Róisín Áine Costello BL

  • Junior Counsel: 2020

LL.B. (Dubl), M.A. (SciencesPo Paris), LL.M. (Georgetown), Ph.D. (Dubl)

Areas of Practice:
  • Administrative Law
  • Commercial/Chancery
  • General Practice
  • Judicial Review
  • Data Protection Law
  • Defamation
  • European Law
  • Human Rights
  • Public International Law
  • Technology Media & Internet Law
Róisín Áine Costello BL

Other Languages:
French (Working)
Irish (Fluent)
Direct Professional Access:

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 acts as a member of the pool of experts for the Council of Europe’s data protection unit and has been a consulting expert on Irish law for the World Bank since 2015.

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

Other recent publications

  • The Brussels Effect:  Regulatory Standard-Setting and Constitutional Conflicts in Post-Brexit Privacy Law” in Celeste et al eds “Data Protection After Brexit: Reflections from the UK and Ireland” (Hart, 2022)
  • “Lost in Translation: Courtroom Interpretation and the Right to a Fair Trial in DPP v HM and BO [2021] IECA 315” Irish Jurist (Forthcoming, 2023)
  • “Citizenship, Identity and Veiling: Interrogating the Limits of Article 8 ECHR in Cases Involving the Religious Dress of Muslim Women” 38(1) Journal of Law and Religion (2023) (with Dr Sahar Ahmed)
  • “To be British, Irish, or both: Understanding Language Rights as a Tool for Reconciliation in Northern Ireland” 33(2) Irish Studies in International Affairs (2022)
  • “Genetic Data and The Right to Privacy: Towards a Relational Theory of Privacy?” 22(a) Human Rights Law Review (2022) 1
  • “The ECtHR Decision in Volodina: Intimate Images, Domestic Violence and the Positive Obligations of Member States under Article 8 ECHR” 4(7) European Data Protection Law Review (2021) 614
  • “Laws Governing Data Retention in Graham Dwyer v Commissioner of An Garda Síochána” 23(1) Irish Journal of European Law (2021) 119
  • “Schrems II: Everything is Illuminated?” 5 European Papers (2020) 3.
  • “Conflicts Between Intellectual Property and Consumer Property Rights in the Digital Market” 11(1) European Journal of Law and Technology (2020) 1
  • “International criminal law and the role of non-state actors in preserving open source evidence” 7 Cambridge International Law Journal (2018) 2.
  • “The Right to be Forgotten in Cases Involving Criminal Convictions: NT1 & NT2 v Google and the Information Commissioner” 3 European Human Rights Law Review (2018) 268.

  • “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” 21st 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

Board member, Irish Centre for European Law

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087-294 4060
Law Library Four Courts Dublin 7

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