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About Mary Wilks

Mary advises on a broad range of EU and UK competition law issues, including multijurisdictional mergers, behavioural investigations and complex supply and distribution arrangements. 

She works across all sectors, with particular experience in consumer products, healthcare, media and financial services.

Mary works closely with her clients to understand their business and takes a commercial approach to developing case strategy. She is adept at leading the multi-disciplinary teams required to deliver successfully across jurisdictions.

Her experience and technical expertise enable her to deliver innovative and practical solutions to achieve her clients’ goals.

Recent work

  • Advising London Stock Exchange Group on its proposed merger with Deutsche Börse.
  • Advising Comcast Corporation on the global merger control and public interest aspects of its £30bn public bid for Sky plc, including achieving unconditional Phase 1 clearance from the European Commission for the transaction, and the global merger control and public interest aspects of its $66bn bid for the global assets of 21stCentury Fox.
  • Advising Müller UK & Ireland on its acquisition of Dairy Crest’s dairy operations.
  • Advising Spire Healthcare Group on the UK private healthcare market investigation.
  • Advising Tesco on the UK Office of Fair Trading’s investigations into the retail of tobacco and dairy products markets, the latter successfully appealed to the Competition Appeals Tribunal.
  • Advising Sara Lee on: the €1.2bn sale of its global bodycare and European detergents business to Unilever, cleared subject to conditions after a Phase II review by the European Commission; and the €320m sale of its haircare business to Procter & Gamble, cleared unconditionally by the European Commission.
  • Advising Pearson on the European Commission’s investigation into e-books.



  • MA (EU Competition Law – King’s College London)
  • Legal Practice Course and PgDL (BPP Law School)
  • MA (Modern History – Magdalen College, Oxford)

Other qualifications

  • Before qualifying as a solicitor, Mary spent three years as a strategy consultant, advising firms in the financial services, retail and technology sectors in the UK and South Africa.
  • In 2004 Mary spent six months as a volunteer for Reprieve in New Orleans, Louisiana, assisting lawyers representing capital post-conviction clients.