Overview
Will is a Partner in the Antitrust & Foreign Investment Group and co-heads the firm’s technology sector team.
Will advises multinational corporates and other institutions on all areas of EU competition, foreign investment and regulatory laws. He has a broad range of experience in EU and UK competition law, notably in relation to complex M&A, abuse of dominance, state aid and regulatory price control matters.
Will has assisted clients with merger control filings and antitrust proceedings across multiple jurisdictions, with particular experience before the European Commission and the UK’s Competition & Markets Authority. His experience spans many industry sectors, with a particular focus in the financial infrastructure, FMCG, life sciences, tech and telecoms spaces.
During his career Will has worked in Brussels, London and Paris and has had client secondments with HSBC and Unilever.
Will also regularly publishes and speaks on competition law topics and won this year’s Concurrences Jury Award for Best Business Article on Unilateral Conduct.
Work highlights
- Intel: advising Intel on the global merger control proceedings for the sale of its NAND and SSD business to SK Hynix
- Vodafone / Telecom Italia / INWIT: 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.
- 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.
- Google Shopping: advising Kelkoo in its response to Alphabet’s appeal before the Court of Justice of the European Union.
- Assist Vodafone, Deutsche Telekom, Telefónica, Orange, AT&T, T-Mobile and Verizon with the antitrust and foreign investment screening (‘FDI’) advice on the potential development and roll-out of network APIs by way of a new venture with one or more other participating partners.
- A global tech company: representing one of the largest global companies before the EU General Court in its application for annulment of a Commission Decision and fine for alleged unfair trading conditions.
Education and qualifications
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.
Published works
Will regularly publishes on competition law. Recent examples include:
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)
