Claire Jeffs
UK Guide 2025
Band 1 : Competition Law
Email address
[email protected]Contact number
020 7090 4031Share profile
Band 1
About
Provided by Claire Jeffs
Practice Areas
Competition
Global Investigations
Media & Telecoms
Career
Claire is Co-Chair of the Competition Group globally and works in Slaughter and May’s Brussels and London offices.
Claire has extensive experience of both EU and UK competition law. She has been involved in a large number of high-profile merger cases before the EU and UK competition authorities, as well as coordinating merger approvals worldwide. On the contentious side, she has been involved in many cartel and other behavioural cases, including on appeal to the General Court in Luxembourg.
Chambers Review
UK
Claire Jeffs has a strong reputation for acting on phase I and II 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.
Strengths
Provided by Chambers
"Claire Jeffs goes from strength to strength."
"Her knowledge of sectors like IT is really impressive and she has achieved outstanding results there."
"I would say she is a real standout; she is just brilliant."
"Claire Jeffs goes from strength to strength."
"Her knowledge of sectors like IT is really impressive and she has achieved outstanding results there."
"I would say she is a real standout; she is just brilliant."
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Slaughter and May
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