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Country law guide · United Kingdom

Competition & antitrust in United Kingdom

Merger review, restrictive agreements, abuse of dominance and regulatory investigations.

UK competition assessment uses CMA powers and the relevant statutory regime, including digital markets changes where applicable. EU competition law may also affect conduct with an EU connection. Merger control, restrictive agreements and strategic-market-status regulation are distinct questions and should not be collapsed into a single approval exercise.

Jurisiti can assist with merger screening, restrictive-contract review and regulatory responses. Analyse the actual market, control and commercial conduct before applying thresholds or exemptions. Sensitive competitor exchanges and implementation before clearance need particular attention. Records supplied to an authority should be accurate, coherent and supported by the transaction evidence. Separate merger, conduct and digital-market regulatory assessments.

Key laws & official sources

CMA merger assessment guidelines

Explains the competition assessment of mergers; current jurisdictional rules and separate investment screening also require review.

CMA unfair commercial practices guidance

Explains consumer trading rules under the DMCC framework applicable from April 2025.

Point to check

Confirm the current provisions, territorial scope and procedure for the particular facts; the linked sources support general guidance rather than an individual legal conclusion.

Practical next steps

  • Separate merger, conduct and digital-market regulatory assessments.
  • Map ownership, markets and transaction structure.
  • Review restrictive terms and competitor information exchanges.

Documents to prepare

  • Market and turnover information
  • Commercial agreements and internal guidance
  • Regulator correspondence and transaction papers
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How Jurisiti can help

Competition analysis depends on conduct, market conditions and jurisdictional thresholds rather than the contract label alone. National rules and EU rules may both require consideration where their conditions are met. Review exclusivity, information exchange, pricing restrictions and filing obligations before implementing an arrangement.

  • Distribution and cooperation arrangements
  • Merger control and transaction planning
  • Investigations, compliance and damages claims

Questions about your matter

How do I start a competition & antitrust enquiry in United Kingdom?

Identify the jurisdiction, the people involved, any existing proceeding or deadline, and the result you need. A short chronology and the key documents help define the proposed engagement before local professional arrangements are confirmed.

Can a cross-border matter involve more than one legal system?

Yes. United Kingdom may be one part of a wider matter involving another place of residence, contracting party, asset or forum. Applicable law, jurisdiction and enforcement should be assessed separately, using the relevant national and international rules.

Does this guide establish a lawyer-client relationship?

No. An enquiry or use of this guide does not establish an engagement. Conflicts, professional authority, scope, responsibilities and fees must be confirmed before work is undertaken.

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