The CMA has been delivering a programme of work to embed our 4Ps framework – pace, predictability, proportionality, and process – across our merger control function.

In January 2026, we launched a review into our approach to the assessment of rivalry-enhancing efficiencies in mergers.

We arethen nowconsulted consulting on proposed updates to our guidelines.

We have published:

• draft revised guidance, which is intended to replace the text currently in paragraphs 8.2 to 8.27 of our Merger Assessment Guidelines
• a consultation document, which summarisessummarised the key changes proposed in the draft revised guidance

We have also published the responses to our call for evidence.