Kim Dietzel

Kim advises on all aspects of UK and EU competition law, including strategic consideration across jurisdictions. Kim has particular expertise in competition investigations and litigation before the CMA and European Commission, and in front of the English Courts and EU courts in Luxembourg. Kim is a qualified solicitor-advocate and appears as an advocate before the Competition Appeal Tribunal.

Kim is highly commended by the major legal directories for Competition Litigation, recognised by Legal 500 UK as a 'leading partner' and ranked in Band 1 by Chambers UK. Lauded most recently by clients, Kim is described as "a formidable presence in the competition field, with unrivalled strategic acumen. Having her in your corner ensures an exceptional strategic advantage" (Chambers UK, 2026) while another client emphasised "for our most critical competition cases, she is my counsel of choice.” She is also ranked as a 'Global Elite Thought Leader' by Lexology Index (formerly Who's Who Legal) and was listed as an 'Acritas Star' in the Acritas Star Report, a report on stand-out lawyers nominated by clients worldwide.

She advises a range of clients, across the technology, transport, aviation, financial services and consumer goods sectors. She regularly speaks at international conferences and has published extensively on competition issues, including with respect to leniency and follow on litigation. She is a committee member of the Competition Law Association, the Law Society Competition Section, the City of London Law Society committee on private actions, and the International Chamber of Commerce, working partly on private actions.