Will Leslie | Lawyers

Admissions

Belgium, UK (England & Wales)

Services

Antitrust & Foreign Investment Group

Sectors

Technology

Overview

Will is a Partner in the Antitrust & Foreign Investment Group in Brussels and co-heads the firm’s technology sector team. He is also co-chair of BritCham EU’s competition section.

He advises multinational corporates on EU and UK competition law. He has a particular focus on merger control as well as antitrust investigations and litigation. Will is a member of the Brussels Bar (A list), as well as being qualified as a solicitor (England and Wales). He has worked in Brussels, London and Paris.

Will regularly publishes and speaks on competition law topics and won this year’s Concurrences Jury Award for Best Business Article on Unilateral Conduct.

Experience

Merger Control

Advising one of the world’s leading industry associations on their response to European Commission’s draft merger guidelines
Advising on the antitrust and foreign investment aspects of Vodafone and Telenor’s global joint procurement venture
Advising a consortium of telecommunication providers on the antitrust and foreign investment aspects of forming Aduna, a platform with Ericsson for the development and roll-out of network APIs
Advising Vodafone on the European Commission’s parallel antitrust and merger control investigations into its network sharing arrangements with Telecom Italia, including the merger of its passive tower infrastructure in Italy into INWIT
Advising Intel on the global merger control proceedings for the sale of its NAND and SSD business to SK Hynix

Antitrust investigations and litigation

Acting for one of the largest global companies before the EU General Court in its application for annulment of a Commission Decision and fine for alleged abuse of dominance
Acting for Kelkoo in its response to Alphabet’s appeal before the Court of Justice of the European Union in relation to the European Commission’s Google Shopping decision for abuse of dominance
Abuse of Dominance Investigations (Exclusivity): advising a multinational corporate in relation to investigations by authorities in the EU into alleged abuse of dominance as well as the subsequent appeals processes

Platform regulation investigations and litigation

Advising a global technology company on one of the first commitment decisions under the Digital Services Act

Education, Qualifications and Languages

Will holds an M.A. history and an M.Phil. in international relations from Cambridge University as well as a master’s in EU competition law from King’s College, London.

Thought Leadership

Will regularly publishes on competition law. Recent examples include:

Articles

Christian Ahlborn, Gerwin van Gerven and Will Leslie “Bronner revisited: Google Shopping and the Resurrection of Discrimination Under Article 102 TFEU” JECLAP, Volume 13, Issue 2, 2022

Gerwin van Gerven, Annamaria Mangiaracina, Will Leslie, Lodewick Prompers, “Data and privacy in EU Merger Control” in GCR’s Digital Markets Guide - First Edition (2021)

Christian Ahlborn and Will Leslie, '“Jack of all trades, master of none”: the ever-increasing ambit of the market investigation regime’ in A. MacCulloch, B. Rodger and P. Whelan (eds), The UK Competition Regime: A Twenty-Year Retrospective (OUP: 2021)

Will Leslie, Eoin O’Reilly, Dzhuliia Lypalo, Sergey Khodjamirian “Same, same but different? Defining gatekeepers under the Digital Markets Act” Journal of European Competition Law & Practice, 2026

Gerwin Van Gerven, William Leslie, Elisabeth Wielinger “Nothing has changed? The Commission’s draft Article 102 guidelines and the “new” effects-based approach to Article 102 enforcement”, LinkingCompetition, 2024

Christian Ahlborn, Will Leslie, Marvin Berkel, “Legal Scalpel or Regulatory Swiss Army Knife? The New Article 102, What Market Investigations Can Tell Us about the Difference between Law and Regulation, and What That Means for Article 102’s Ultimate Purpose” Journal of European Competition Law & Practice, 2023

Book chapters

Will Leslie, Bernd Meyring, Gerwin van Gerven, Jihane Mirode “Thirty-Five Years of Predicting the (Economic) Future: The Role of Economic Evidence in EU Merger Control”, Olivier Guersent Liber Amicorum, 2026

Overview

Will is a Partner in the Antitrust & Foreign Investment Group in Brussels and co-heads the firm’s technology sector team. He is also co-chair of BritCham EU’s competition section.

Will regularly publishes and speaks on competition law topics and won this year’s Concurrences Jury Award for Best Business Article on Unilateral Conduct.

Experience

Merger Control

Advising one of the world’s leading industry associations on their response to European Commission’s draft merger guidelines

Advising on the antitrust and foreign investment aspects of Vodafone and Telenor’s global joint procurement venture

Advising a consortium of telecommunication providers on the antitrust and foreign investment aspects of forming Aduna, a platform with Ericsson for the development and roll-out of network APIs

Advising Vodafone on the European Commission’s parallel antitrust and merger control investigations into its network sharing arrangements with Telecom Italia, including the merger of its passive tower infrastructure in Italy into INWIT

Advising Intel on the global merger control proceedings for the sale of its NAND and SSD business to SK Hynix

Antitrust investigations and litigation

Acting for one of the largest global companies before the EU General Court in its application for annulment of a Commission Decision and fine for alleged abuse of dominance

Acting for Kelkoo in its response to Alphabet’s appeal before the Court of Justice of the European Union in relation to the European Commission’s Google Shopping decision for abuse of dominance

Abuse of Dominance Investigations (Exclusivity): advising a multinational corporate in relation to investigations by authorities in the EU into alleged abuse of dominance as well as the subsequent appeals processes

Platform regulation investigations and litigation

Advising a global technology company on one of the first commitment decisions under the Digital Services Act

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