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UK/EU Agreement regarding Cooperation on the Application of their Respective Competition Laws

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Summary

The UK and EU have concluded an international treaty on competition law cooperation, presented to Parliament on 15 April 2026. The agreement establishes a framework for cooperation between UK and EU competition authorities in enforcing their respective competition laws, including coordination on investigations, information sharing, and avoidance of conflicts. The treaty is referenced as MS No.4/2026 and is available as a 2.3 MB PDF document.

What changed

The UK and EU have entered into a bilateral agreement regarding cooperation on the application of their respective competition laws. This international treaty establishes formal mechanisms for coordination between UK and EU competition enforcement authorities, including provisions for notification of enforcement activities, information sharing, and procedural cooperation to avoid conflicts in cross-border competition matters.

For businesses and legal practitioners engaged in competition proceedings or transactions subject to review in both the UK and EU, this treaty signals increased coordination between authorities. Companies involved in multi-jurisdictional mergers, investigations, or enforcement actions should expect greater alignment between UK Competition and Markets Authority and European Commission proceedings. Legal professionals advising on competition compliance should monitor for subsequent implementing guidance from UK authorities.

What to do next

  1. Review treaty provisions for implications on cross-border competition proceedings
  2. Monitor for implementing guidance from UK Competition and Markets Authority
  3. Assess whether current compliance programmes require updates regarding UK/EU coordination

Archived snapshot

Apr 15, 2026

GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.

International treaty

UK/EU: Agreement regarding Cooperation on the Application of their Respective Competition Laws [MS No.4/2026]

This treaty was presented to Parliament in April 2026.

From: Foreign, Commonwealth & Development Office Published 15 April 2026 Get emails about this page

Documents

UK/EU: Agreement regarding Cooperation on the Application of their Respective Competition Laws

Ref: ISBN 978-1-5286-6402-8, CP 1566

PDF, 2.3 MB, 16 pages

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Explanatory memorandum: UK/EU: Agreement regarding Cooperation on the Application of their Respective Competition Laws

ODT, 29 KB

This file is in an OpenDocument format


Details

Published title: Agreement between the United Kingdom of Great Britain and Northern Ireland and the European Union regarding Cooperation on the Application of their Respective Competition Laws.

Updates to this page

Published 15 April 2026

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Last updated

Classification

Agency
FCDO
Published
April 15th, 2026
Instrument
Rule
Legal weight
Binding
Stage
Final
Change scope
Substantive
Document ID
MS No.4/2026, ISBN 978-1-5286-6402-8, CP 1566

Who this affects

Applies to
Government agencies
Industry sector
9211 Government & Public Administration
Activity scope
Competition enforcement Cross-border merger review International regulatory cooperation
Geographic scope
United Kingdom GB

Taxonomy

Primary area
Antitrust & Competition
Operational domain
Legal
Topics
International Trade Financial Services

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