Dan Warner is an English-qualified associate in Gibson Dunn’s Dispute Resolution Group in London.
Dan has a broad disputes practice with experience of handling complex and substantial cross-border disputes. His litigation experience has involved representing clients in Employment Tribunals, the High Court, the Competition Appeal Tribunal, the Court of Appeal and the Supreme Court. A particular focus of his practice is collective actions, and he has advised on several of the largest and most significant UK class actions in recent years.
Prior to joining Gibson Dunn, Dan trained and practised at a Magic Circle firm.
Representative experience:
- Representing a leading global corporation in the technology sector in connection with class actions commenced against it in the Competition Appeal Tribunal alleging abuses of dominance.
- Advising a major global technology company on the management of various antitrust-related class actions and related litigation brought against it in a number of countries worldwide.
- Representing a major bank in relation to both the High Court litigation and the proposed collective proceedings brought in the Competition Appeal Tribunal arising out of the forex investigations (including an appeal to the Supreme Court in respect of the collective proceedings which was heard in April 2025).
- Representing a UK retailer in one of the largest private sector mass equal pay claims to be heard in the English courts.
- Representing a truck manufacturer in its defence of one of the largest ever competition law follow-on damages proceedings in the UK courts and Competition Appeal Tribunal.
- Representing a technology company in relation to High Court litigation arising out of the smart card chips cartel.
Capabilities
- Litigation
- Antitrust and Competition
- Class Actions
- International Arbitration
- Transnational Litigation
- White Collar Defense and Investigations
Credentials
Education:
- BPP Law School - 2013 Legal Practice Course
- University of Bristol - 2012 LL.B. (First Class Hons)
Admissions:
- England & Wales - Solicitor