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CMA Enforcement Policy and Guidance

The Competition and Markets Authority is updating its enforcement policy and guidance to clarify how it takes regulatory action against anti-competitive conduct, mergers, and consumer protection breaches. Recent updates include revised merger remedies guidance, cartel leniency policy, and enforcement function guidance.

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Family: Consultations
24 Apr 2026 | Consultation (open) Competition and Markets Authority Context · primary home: Competition Reform Bill linked

Transparency and disclosure: updating our general guidance — consultation opened

The Competition and Markets Authority (CMA) is consulting on updates to its general guidance on transparency and disclosure.

▤ View document · ↗ GOV.UK · ↓ Consultation document (12pp)
+2 more
↓ Draft updated CMA6 guidance (clean version) (58pp) ↓ Draft updated CMA6 guidance (tracked changes) (54pp)
30 Oct 2025 | Consultation outcome linked

Amending our Taking Regulatory Action policy — outcome published

This consultation sets out our proposals to complete the work we began in 2019 to update our policy ‘Taking Regulatory Action’.

▤ View document · ↗ GOV.UK · ↓ Amending our Taking Regulatory Action policy
+3 more
↓ DRAFT - Supporting compliance and taking regulatory action ↓ Decisions: Supporting compliance and taking regulatory acti… ↓ Analysis: Supporting compliance and taking regulatory action
28 Oct 2025 | Consultation outcome Competition and Markets Authority linked

Leniency and no-action in cartel cases — outcome published

The CMA is consulting on proposed changes to its published guidance on applications for leniency and no-action in cartel cases.

▤ View document · ↗ GOV.UK · ↓ Consultation document (25pp)
+12 more
↓ [Draft for consultation] Short guide to cartels and lenienc… (18pp) ↓ [Draft for consultation] Short guide to cartels and lenienc… (16pp) ↓ [Draft for consultation] Applications for leniency and no-a… (140pp) ↓ Summary of responses (40pp) ↓ Ashurst LLP (7pp) ↓ City of London Law Society Competition Law Committee (9pp) ↓ Cleary Gottlieb Steen & Hamilton LLP (6pp) ↓ Eversheds Sutherland International LLP (4pp) ↓ Freshfields LLP (16pp) ↓ Herbert Smith Freehills Kramer LLP (7pp) ↓ Linklaters LLP (5pp) ↓ Mills & Reeve LLP (6pp)
9 Jun 2025 | Consultation outcome Competition and Markets Authority linked

Leniency and no-action in cartel cases — consultation closed

The CMA is consulting on proposed changes to its published guidance on applications for leniency and no-action in cartel cases.

▤ View document · ↗ GOV.UK · ↓ Consultation document (25pp)
+12 more
↓ [Draft for consultation] Short guide to cartels and lenienc… (18pp) ↓ [Draft for consultation] Short guide to cartels and lenienc… (16pp) ↓ [Draft for consultation] Applications for leniency and no-a… (140pp) ↓ Summary of responses (40pp) ↓ Ashurst LLP (7pp) ↓ City of London Law Society Competition Law Committee (9pp) ↓ Cleary Gottlieb Steen & Hamilton LLP (6pp) ↓ Eversheds Sutherland International LLP (4pp) ↓ Freshfields LLP (16pp) ↓ Herbert Smith Freehills Kramer LLP (7pp) ↓ Linklaters LLP (5pp) ↓ Mills & Reeve LLP (6pp)
15 May 2025 | Consultation outcome linked

Amending our Taking Regulatory Action policy — consultation closed

This consultation sets out our proposals to complete the work we began in 2019 to update our policy ‘Taking Regulatory Action’.

▤ View document · ↗ GOV.UK · ↓ Amending our Taking Regulatory Action policy
+3 more
↓ DRAFT - Supporting compliance and taking regulatory action ↓ Decisions: Supporting compliance and taking regulatory acti… ↓ Analysis: Supporting compliance and taking regulatory action
29 Apr 2025 | Consultation outcome Competition and Markets Authority linked

Leniency and no-action in cartel cases — consultation opened

The CMA is consulting on proposed changes to its published guidance on applications for leniency and no-action in cartel cases.

▤ View document · ↗ GOV.UK · ↓ Consultation document (25pp)
+12 more
↓ [Draft for consultation] Short guide to cartels and lenienc… (18pp) ↓ [Draft for consultation] Short guide to cartels and lenienc… (16pp) ↓ [Draft for consultation] Applications for leniency and no-a… (140pp) ↓ Summary of responses (40pp) ↓ Ashurst LLP (7pp) ↓ City of London Law Society Competition Law Committee (9pp) ↓ Cleary Gottlieb Steen & Hamilton LLP (6pp) ↓ Eversheds Sutherland International LLP (4pp) ↓ Freshfields LLP (16pp) ↓ Herbert Smith Freehills Kramer LLP (7pp) ↓ Linklaters LLP (5pp) ↓ Mills & Reeve LLP (6pp)
20 Feb 2025 | Consultation outcome linked

Amending our Taking Regulatory Action policy — consultation opened

This consultation sets out our proposals to complete the work we began in 2019 to update our policy ‘Taking Regulatory Action’.

▤ View document · ↗ GOV.UK · ↓ Amending our Taking Regulatory Action policy
+3 more
↓ DRAFT - Supporting compliance and taking regulatory action ↓ Decisions: Supporting compliance and taking regulatory acti… ↓ Analysis: Supporting compliance and taking regulatory action
19 Dec 2024 | Consultation outcome Competition and Markets Authority linked

Updated CMA transparency and disclosure statement, including new overseas investigative assistance guidance — outcome published

The CMA is consulting on an updated version of transparency and disclosure: statement of the CMA’s policy and approach (CMA6).

▤ View document · ↗ GOV.UK · ↓ Consultation document (10pp)
+6 more
↓ Draft CMA6 consultation - Transparency and disclosure, Stat… (53pp) ↓ Draft CMA6 comparison document (94pp) ↓ Summary of responses to the consultation (16pp) ↓ Freshfields (9pp) ↓ Law Society Scotland (7pp) ↓ The City of London Law Society (3pp)
24 Jun 2024 | Consultation outcome Competition and Markets Authority linked

Updated CMA transparency and disclosure statement, including new overseas investigative assistance guidance — consultation closed

The CMA is consulting on an updated version of transparency and disclosure: statement of the CMA’s policy and approach (CMA6).

▤ View document · ↗ GOV.UK · ↓ Consultation document (10pp)
+6 more
↓ Draft CMA6 consultation - Transparency and disclosure, Stat… (53pp) ↓ Draft CMA6 comparison document (94pp) ↓ Summary of responses to the consultation (16pp) ↓ Freshfields (9pp) ↓ Law Society Scotland (7pp) ↓ The City of London Law Society (3pp)
24 May 2024 | Consultation outcome Competition and Markets Authority linked

Updated CMA transparency and disclosure statement, including new overseas investigative assistance guidance — consultation opened

The CMA is consulting on an updated version of transparency and disclosure: statement of the CMA’s policy and approach (CMA6).

▤ View document · ↗ GOV.UK · ↓ Consultation document (10pp)
+6 more
↓ Draft CMA6 consultation - Transparency and disclosure, Stat… (53pp) ↓ Draft CMA6 comparison document (94pp) ↓ Summary of responses to the consultation (16pp) ↓ Freshfields (9pp) ↓ Law Society Scotland (7pp) ↓ The City of London Law Society (3pp)
4 Nov 2020 | Consultation outcome Competition and Markets Authority linked

Revised CA98 procedures guidance — outcome published

The CMA consulted on proposed revisions to its published guidance on procedures for running Competition Act 1998 (CA98) cases.

▤ View document · ↗ GOV.UK · ↓ Consultation document (25pp)
+9 more
↓ Draft revised guidance on the CMA's investigation procedure… (87pp) ↓ Draft revised guidance on the CMA's investigation procedure… (96pp) ↓ Response to consultation (36pp) ↓ Ashurst (7pp) ↓ Baker McKenzie (3pp) ↓ Bristows (5pp) ↓ City of London Law Society Competition Law Committee (3pp) ↓ Herbert Smith Freehills (10pp) ↓ Linklaters (6pp)
11 Sep 2020 | Consultation outcome Competition and Markets Authority linked

Revised CA98 procedures guidance — consultation closed

The CMA consulted on proposed revisions to its published guidance on procedures for running Competition Act 1998 (CA98) cases.

▤ View document · ↗ GOV.UK · ↓ Consultation document (25pp)
+9 more
↓ Draft revised guidance on the CMA's investigation procedure… (87pp) ↓ Draft revised guidance on the CMA's investigation procedure… (96pp) ↓ Response to consultation (36pp) ↓ Ashurst (7pp) ↓ Baker McKenzie (3pp) ↓ Bristows (5pp) ↓ City of London Law Society Competition Law Committee (3pp) ↓ Herbert Smith Freehills (10pp) ↓ Linklaters (6pp)
5 Aug 2020 | Consultation outcome Competition and Markets Authority linked

Revised CA98 procedures guidance — consultation opened

The CMA consulted on proposed revisions to its published guidance on procedures for running Competition Act 1998 (CA98) cases.

▤ View document · ↗ GOV.UK · ↓ Consultation document (25pp)
+9 more
↓ Draft revised guidance on the CMA's investigation procedure… (87pp) ↓ Draft revised guidance on the CMA's investigation procedure… (96pp) ↓ Response to consultation (36pp) ↓ Ashurst (7pp) ↓ Baker McKenzie (3pp) ↓ Bristows (5pp) ↓ City of London Law Society Competition Law Committee (3pp) ↓ Herbert Smith Freehills (10pp) ↓ Linklaters (6pp)
18 Apr 2018 | Consultation outcome Competition and Markets Authority linked

CA98 penalties guidance — outcome published

The CMA consulted on proposed revisions to its published guidance on penalty setting in Competition Act 1998 (CA98) cases.

▤ View document · ↗ GOV.UK · ↓ Consultation document: Draft revised CMA guidan… (23pp)
+14 more
↓ CMA’s guidance as to the appropriate amount of a penalty – … (28pp) ↓ CMA's guidance as to the appropriate amount of a penalty – … (29pp) ↓ Summary of responses to the consultation (13pp) ↓ American Bar Association (4pp) ↓ Charles Russell Speechlys LLP (1pp) ↓ Clifford Chance LLP (5pp) ↓ Ashurst LLP (7pp) ↓ Baker McKenzie (3pp) ↓ Davis Polk & Wardwell London LLP (4pp) ↓ Freshfields Bruckhaus Deringer LLP (5pp) ↓ Herbert Smith Freehills LLP (7pp) ↓ International Bar Association (10pp) ↓ United Utilities (1pp) ↓ Law Society of Scotland (4pp)
27 Sep 2017 | Consultation outcome Competition and Markets Authority linked

CA98 penalties guidance — consultation closed

The CMA consulted on proposed revisions to its published guidance on penalty setting in Competition Act 1998 (CA98) cases.

▤ View document · ↗ GOV.UK · ↓ Consultation document: Draft revised CMA guidan… (23pp)
+14 more
↓ CMA’s guidance as to the appropriate amount of a penalty – … (28pp) ↓ CMA's guidance as to the appropriate amount of a penalty – … (29pp) ↓ Summary of responses to the consultation (13pp) ↓ American Bar Association (4pp) ↓ Charles Russell Speechlys LLP (1pp) ↓ Clifford Chance LLP (5pp) ↓ Ashurst LLP (7pp) ↓ Baker McKenzie (3pp) ↓ Davis Polk & Wardwell London LLP (4pp) ↓ Freshfields Bruckhaus Deringer LLP (5pp) ↓ Herbert Smith Freehills LLP (7pp) ↓ International Bar Association (10pp) ↓ United Utilities (1pp) ↓ Law Society of Scotland (4pp)
2 Aug 2017 | Consultation outcome Competition and Markets Authority linked

CA98 penalties guidance — consultation opened

The CMA consulted on proposed revisions to its published guidance on penalty setting in Competition Act 1998 (CA98) cases.

▤ View document · ↗ GOV.UK · ↓ Consultation document: Draft revised CMA guidan… (23pp)
+14 more
↓ CMA’s guidance as to the appropriate amount of a penalty – … (28pp) ↓ CMA's guidance as to the appropriate amount of a penalty – … (29pp) ↓ Summary of responses to the consultation (13pp) ↓ American Bar Association (4pp) ↓ Charles Russell Speechlys LLP (1pp) ↓ Clifford Chance LLP (5pp) ↓ Ashurst LLP (7pp) ↓ Baker McKenzie (3pp) ↓ Davis Polk & Wardwell London LLP (4pp) ↓ Freshfields Bruckhaus Deringer LLP (5pp) ↓ Herbert Smith Freehills LLP (7pp) ↓ International Bar Association (10pp) ↓ United Utilities (1pp) ↓ Law Society of Scotland (4pp)