LAWYER PROFILE

Claire Jeffs

Europe 2026

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Slaughter and May
 Slaughter and May

Ranked in 1 practice area

Competition Law

UK

11 years ranked

Chambers Review

Provided by Chambers

Chambers European Guide

Competition Law - UK

Band 1
Individual Editorial

Claire Jeffs has a strong reputation for acting on high-profile merger clearance investigations before the CMA, assisting clients from the automotive, technology and telecommunications sectors. She co-chairs the firm's competition group and offers additional experience in appeals against competition law decisions before the General Court of the European Union.

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Strengths

Provided by Chambers

  • Claire Jeffs is an excellent lawyer on big merger transactions. She builds strong client relationships and helps navigate them through the regulatory process.

    Competition LawChambers European Guide

  • Claire Jeffs provides excellent advice with a practical approach. She is trusted by those in her field.

    Competition LawChambers European Guide

  • Claire Jeffs might be the best merger lawyer in the country. She is an outstanding technical lawyer who has hunger and ambition. She is driven and relentless and clients get a fantastic service.

    Competition LawChambers European Guide

  • Claire Jeffs has provided us with her great expertise. Her experience in complex matters and leading a team shows, as well as her responsiveness.

    Competition LawChambers European Guide

Ranked Individuals at Slaughter and May (30)

Belgium

UK

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