Dr Dorota Leczykiewicz is Associate Professor of Law and an Official Fellow of St Peter's College. She was previously a Junior Research Fellow and then a Fellow by Special Election at Trinity College, Oxford, a Leverhulme Trust Early Career Fellow in the Oxford Faculty of Law, and a Marie Curie Fellow at the European University Institute in Florence. Her research interests focus on Tort law, legal reasoning, European and comparative private law and EU constitutional law. She holds a DPhil from the University of Oxford in comparative judicial reasoning in Tort. Together with Professor Stephen Weatherill she edited two collections of papers -The Involvement of EU Law in Private Law Relationships (Hart Publishing 2013) and The Images of the Consumer in EU Law: Legislation, Free Movement and Competition Law (Hart Publishing 2016). Recently, she has authored chapters on the role of the binding Charter of Fundamental Rights in EU constitutionalism, fundamental rights in the EU digital market, and the reform of the Frech law of civil liability. Her article on the purpoted general principle of EU law prohibiting abusive practices was published in 2019 in the Common Market Law Review. 

In the Faculty, Dr Leczykiewicz gives lectures in EU law and teaches on the BCL/MJur courses of Private Law and Fundamental Rights and the Constitutional Principles of the EU. At St Peter's College, she teaches tutorials in EU law and Tort law. She is supervising doctoral students conducting reseaerch in EU, comparative and private law.


Displaying 1 - 35 of 35. Sorted by year, then title.
Filter by
  • D Leczykiewicz, 'Judicial Development of EU Fundamental Rights Law in the Digital Era – A Fresh Look at the Concept of ‘General Principles’' in Ulf Bernitz, Xavier Groussot, Jaan Paju and Sybe de Vries (eds), General Principles of EU Law and the EU Digital Order (Kluwer Law International 2020)
  • D Leczykiewicz, 'Loss and its Compensation in the Proposed New French Regime of Extra-contractual Liability' in Jean-Sébastien Borghetti and Simon Whittaker (eds), French Civil Liability in Comparative Perspective (Hart Publishing 2019)
    The chapter has been published also in French as ‘Le préjudice et sa réparation dans le projet de réforme de la responsabilité civile’ in Revue des contrats 2019, n°04 - page 223.
  • D Leczykiewicz, 'Prohibition of Abusive Practices as a 'General Principle' of EU Law' (2019) 56 Common Market Law Review 703
    This article discusses the proposition that EU law contains a “general principle” laying down a prohibition of abusive practices of various kinds, which does not have to be implemented by national law before the prohibition can be relied on against a private party. This principle was first introduced in Cussens v. Brosman, and recently confirmed by the Grand Chamber, in Ömer Altun and in N Luxembourg 1. Because of its scope and the power it creates for national authorities, the principle differs from the abuse of rights doctrine previously operating in EU law. The article argues that a principle which prohibits unspecified “abusive practices” at a general level, capable of creating new enforcement powers, is alien to pre-existing ECJ case law; and to the extent it covers also abuses of national law, it cannot be justified on constitutional grounds. It is also incorrect to refer to it as a “general principle”, a tactic used by the Court to make the principle enforceable against a private party. The article argues that EU law in fact contains a limited set of abuse principles generating different effects, only some of which could be brought under an umbrella of a single principle.
  • D Leczykiewicz, 'The Charter of Fundamental Rights and the EU’s Shallow Constitutionalism' in NW Barber, M Cahill and R Ekins (eds), The Rise and Fall of the European Constitution (Hart Publishing 2019)
  • D Leczykiewicz, 'Compensatory Remedies in EU Law: The Relationship Between EU Law and National Law' in P Giliker (ed), Research Handbook on EU Tort Law (Edward Elgar 2017)
  • D Leczykiewicz, 'Private Regulation, Compliance and Reviewability of Contracts' in R Brownsword, R van Gestel and H-W Micklitz (eds), Contract and Regulation: A Handbook on New Methods of Law Making in Private Law (Edward Elgar 2017)
  • D Leczykiewicz, 'Regulatory Cost, the Consumer and the EU Constitutional Framework' in D Leczykiewicz and S Weatherill (eds), The Images of the Consumer in EU Law: Legislation, Free Movement and Competition Law (Hart Publishing Oxford 2016)
  • D Leczykiewicz, 'Human Rights in the Area of Freedom, Security and Justice' in M Fletcher, E Herlin-Karnell and C Matera (eds), The European Union as an Area of Freedom, Security and Justice (Routledge London 2016)
  • D Leczykiewicz and S Weatherill (eds), The Images of the Consumer in EU Law: Legislation, Free Movement and Competition Law (Hart Publishing Oxford 2016)
  • D Leczykiewicz, ''Constitutional Justice' and Judicial Review of EU Legislative Acts' in G de Búrca, D Kochenov and A Williams (eds), Europe’s Justice Deficit? Beyond Good Governance (Hart Publishing Oxford 2015)
  • D Leczykiewicz, 'Conceptualising Conflict between the Economic and the Social in EU Law after Viking and Laval' in M Freedland and J Prassl (eds), Viking, Laval and Beyond (Hart Publishing Oxford 2015)
  • D Leczykiewicz, 'Effectiveness of EU Law Before National Courts: Direct Effect, Effective Judicial Protection, and State Liability' in A Arnull and D Chalmers (eds), Oxford Handbook of European Union Law (Oxford University Press 2015)
  • D Leczykiewicz, 'Horizontal Application of the Charter of Fundamental Rights' (2013) 38 European Law Review 479
    ISBN: 0307-5400
  • D Leczykiewicz, 'Enforcement or Compensation? Damages Actions in EU Law after the Draft Common Frame of Reference' in M Kenny and J Devenney (eds), The Transformation of European Private Law (Cambridge University Press 2013)
  • D Leczykiewicz, 'Horizontal Effect of Fundamental Rights: In Search of Social Justice or Private Autonomy in EU Law?' in U Bernitz and X Groussot (eds), General Principles of EU Law and European Private Law (Kluwer 2013)
  • D Leczykiewicz, 'Melloni and the future of constitutional conflict in the EU' (2013) UK Constitutional Law Blog, 22 May 2013, reposted on the EUtopia Law Blog, 23 May 2013
  • D Leczykiewicz, 'The Constitutional Dimension of Private Law Liability Rules in the EU' in D Leczykiewicz and S Weatherill (eds), The Involvement of EU Law in Private Law Relationships (Hart Publishing Oxford 2013)
  • D Leczykiewicz and Stephen Weatherill (eds), The Involvement of EU Law in Private Law Relationships (Hart Publishing Oxford 2013)
  • D Leczykiewicz, ''Where Angels Fear to Tread': The EU Law of Remedies and Codification of European Private Law' (2012) 8 European Review of Contract Law 47
    ISBN: 1614-9939
  • D Leczykiewicz, 'Lucinda Miller, The Emergence of EU Contract Law. Exploring Europeanization' (2012) 49 Common Market Law Review 305 [Review]
  • D Leczykiewicz, 'The Charter of Fundamental Rights and Member States’ Derogations from Internal Market Obligations' in PM Huber (ed), The EU and National Constitutional Law (Boorberg Stuttgart 2012)
  • D Leczykiewicz, 'The ‘national identity clause’ in the EU Treaty: a blow to supremacy of Union law?' (2012) UK Constitutional Law Blog, 21 June 2012
  • D Leczykiewicz, 'The EU Charter of Fundamental Rights and its effects' (2011) UK Constitutional Law Blog, 4 August 2011
  • D Leczykiewicz, '"Effective Judicial Protection" of Human Rights After Lisbon: Should National Courts Be Empowered to Review EU Secondary Law?' (2010) 35 European Law Review 326
    ISBN: 0307-5400
  • D Leczykiewicz, 'La conformité au principe de protection des droits de l’homme comme condition de la primauté des actes européens dans le troisième pilier' in A Frąckowiak-Adamska and R Grzeszczak (eds), L’espace judiciaire européen (Willy Brandt Zentrum 2010)
  • D Leczykiewicz, 'Wykładnia prounijna w prawie podatkowym a obowiązek poszanowania Konstytucji RP na przykładzie wybranych orzeczeń NSA' in S Biernat and S Dudzik (eds), Doświadczenia prawne pierwszych lat członkostwa Polski w Unii Europejskiej (Kluwer International Warsaw 2010)
  • D Leczykiewicz, 'Commentary on Article 281 EC (legal personality of the European Community)' in A Wróbel (ed), Komentarz. Traktat ustanawiający Wspólnotę Europejską. Volume III (Kluwer International Warsaw 2009)
  • D Leczykiewicz, 'Obywatelstwo UE i prawo do swobodnego przemieszczania sie jako instrumenty ograniczania autonomii regulacyjnej panstw członkowskich' in S Biernat and S Dudzik (eds), Przepływ osób i świadczenie usług w Unii Europejskiej (Kluwer International Warsaw 2009)
  • D Leczykiewicz, 'Private Party Liability in EU Law: In Search of the General Regime' (2009) 12 Cambridge Yearbook of European Legal Studies 257
    ISBN: 1528-8870
  • D Leczykiewicz, 'Why do the European Court of Justice judges need legal concepts?' (2008) 14 European Law Journal 773
    ISBN: 1468-0386
  • D Leczykiewicz, 'Constitutional Conflicts and the Third Pillar' (2008) 33 European Law Review 230
  • D Leczykiewicz, 'Pleural plaques, the concept of damage and liability for psychiatric injury' (2008) 124 Law Quarterly Review 548 [Case Note]
  • D Leczykiewicz, 'Elspeth Guild (ed.), Constitutional Challenges to the European Arrest Warrant' (2007) 44 Common Market Law Review 840 [Review]
  • D Leczykiewicz, 'Polish Constitutional Tribunal, Judgment of 27 April 2005, No. P 1/05, on the constitutionality of the European Arrest Warrant national implementation' (2006) 43 Common Market Law Review 1181 [Case Note]
  • D Leczykiewicz, 'Common Commercial Policy: the Expanding Competence of the European Union in the Area of International Trade' (2005) 6 German Law Journal 1673-1686


Research programmes

Research Interests

EU law, Tort law, European and comparative private law, Legal reasoning

Research projects