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Navigating UK Merger Control Post-Brexit: Insights from CMA Chair Martin Coleman

a black and white chessboard with a white king and a black queen clashing and flying
Photo: Fatima Shahid

Martin Coleman, chair of the Competition and Markets Authority's Panel, discusses the evolving landscape of UK merger control in the post-Brexit era, emphasizing the importance of independence, evidence-based decision-making, and procedural fairness.

20.11.2023 | Competition and Markets Authority


In his address, Martin Coleman highlights the significant changes in UK merger control following Brexit, focusing on the responsibilities of the Competition and Markets Authority (CMA) in assessing mergers. He emphasizes the need for independence in decision-making, free from government influence, and the importance of evidence-based evaluations in determining the competitive impact of proposed mergers.

Coleman outlines the unique structure of the UK merger assessment process, where phase 2 decisions are made by independent experts who engage with cases referred from phase 1. This structure allows for a thorough examination of mergers, ensuring that decisions are based on a comprehensive understanding of market dynamics and competition policy. He stresses that the CMA's role is to prevent anti-competitive mergers for the benefit of UK consumers, even if it means diverging from the approaches of other global competition authorities.

The CMA's approach is characterized by a forward-looking analysis that anticipates the potential effects of a merger on competition. Coleman notes that while the analysis is complex and often involves significant volumes of evidence, the goal is to assess whether a substantial lessening of competition is more likely than not. He acknowledges the challenges posed by dynamic markets and the need for careful consideration of various data sources, including internal documents and third-party evidence.

In discussing the fairness of the phase 2 process, Coleman emphasizes the importance of transparency and engagement with merger parties. He outlines proposed reforms aimed at enhancing the process, including earlier opportunities for parties to present their views, the introduction of an Interim Report, and revamped hearings that allow for more direct dialogue between decision-makers and merger parties. These changes are intended to foster constructive engagement and improve the overall efficiency of the merger assessment process.

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