Emma Walsh focuses her practice on EU and UK competition law and antitrust. In particular, Emma represents clients on a variety of behavioural antitrust investigations and competition disputes before the Competition and Markets Authority (CMA), the Competition Appeal Tribunal (CAT), the European Commission, the High Court and the Court of Appeal. Emma’s experience is diverse, having worked on behalf of a variety of distinguished clients from a wide range of industries including healthcare, life sciences, and retail.
Emma has court experience having represented Sainsbury’s Supermarkets Limited in a four month trial against Visa in the High Court, as well as Concordia in an action challenging the legality of a search warrant issued by the CMA. Emma is currently representing both clients in the Court of Appeal.
Emma is continuing to develop her practical experience in antitrust by advising clients on mergers, cartels, dawn-raids, pricing, dominance, and refusals to supply, with a continued emphasis on competition litigation and behavioural antitrust investigations. She was a member of the team which in 2018 was awarded Behavioural Matter of the Year—Europe, Challenges to CMA Search Warrants, by Global Competition Review.
Emma completed her training contract at Morgan Lewis following her legal studies at Warwick University and the University of Hong Kong.
Acting for Sainsbury’s Supermarkets Ltd. in its landmark victory at the Supreme Court against Visa. In June 2020, the Supreme Court upheld the Court of Appeal's 2018 judgment in favour of Sainsbury’s claim that Visa’s UK multilateral interchange fee was an unlawful restriction of competition under UK and EU law. Prior to the relevant proceedings there had been no English or European ruling that Visa’s interchange fee was a restriction of competition. (Acted for Sainsbury's at the High Court, Court of Appeal, and Supreme Court.)
Acting for Concordia in connection with challenges to CMA Search Warrants at the High Court and the Court of Appeal.
Acting for Concordia in relation to an ongoing investigation by the Competition and Markets Authority into alleged excessive pricing.
Acting for Concordia in relation to a Statement of Objections by the Competition and Markets Authority in relation to an alleged pay-for-delay arrangement.
Acting for a Fortune 500 company in an ongoing investigation into alleged market-sharing and price-fixing.
BPP Law School, 2015, LPC
Warwick University, 2013, LLB, Law
University of Hong Kong, 2012, LLB, Law
England & Wales (Solicitor)
Awards and Affiliations
Recommended, Dispute Resolution: Competition Litigation, The Legal 500 UK (2021)
Member, Practice Group of the Year, Competition, Law360 (2017–2020)
Member, The American Lawyer Young Lawyer Editorial Board
Member, Law Society Competition Section
Member, Behavioural Matter of the Year—Europe, Challenges to CMA Search Warrants, Global Competition Review (2018)