In 2026, the United Kingdom’s mergers and acquisitions (M&A) landscape is being reshaped by a wave of regulatory reforms designed to spur economic growth, streamline approvals, and enhance competitiveness. At the heart of this shift is the interplay between regulatory policy and commercial decision-making. With landmark legislation such as the Digital Markets, Competition and Consumers Act and consultation proposals aimed at refining merger control rules, policymakers and companies alike are asking a pivotal question: Are regulatory reforms speeding up UK M&A closures?
This article explores the evolving regulatory environment in the UK and assesses its impact on deal timelines, cross‑border investment, and the broader commercial ecosystem, with a particular focus on Merger and Acquisition Financial Services activity, which remains central to the UK economy.
The Regulatory Reform Context in the UK
The UK has undertaken significant changes to its competition and merger control regime in recent years. One of the most consequential developments has been the implementation of the Digital Markets, Competition and Consumers Act, which came into force in early 2025 and expanded the powers of the Competition and Markets Authority (CMA). This Act broadened the jurisdictional scope of merger reviews, introduced new thresholds for notification, and granted the CMA greater authority to scrutinise deals, particularly those involving digital market participants.
Simultaneously, in early 2026 the UK Government launched a public consultation aimed at further refining merger and market regulation. Proposals under consideration include narrowing certain jurisdictional criteria, centralising decisionmaking within the CMA, and introducing a single‑phase process for market inquiries. Such measures point to a dual regulatory priority: maintaining robust competition enforcement while reducing process complexity.
The CMA’s enforcement priorities in 2026 also reflect this shift. Under the Digital Markets, Competition and Consumers Act, the CMA continues to exercise enhanced powers, using updated merger control thresholds and a sharper enforcement strategy. Businesses and advisers are closely watching how these powers will affect review outcomes, deal timing and clearance conditions.
Regulatory Reform and Deal Timelines: Faster Approvals Ahead?
A central question for dealmakers is whether regulatory reform is contributing to faster M&A closures. Recent trends suggest that in many straightforward cases, merger reviews are indeed becoming more efficient. According to industry insights, average Phase 1 review periods in 2025 declined to around eighteen working days for unconditional clearances, compared with longer timelines in previous years. Conditional Phase 1 reviews also saw modest speed improvements.
In the UK specifically, the CMA introduced internal performance indicators in mid‑2025 aimed at completing straightforward Phase 1 reviews within twenty‑five working days, well below the statutory deadline of forty working days. Early results indicate that these targets have been met in the majority of cases, suggesting that regulatory streamlining efforts are yielding measurable benefits for deal execution.
Yet, this acceleration has limits. Complex transactions, especially those involving digital platforms or international components, continue to face in‑depth scrutiny that can extend beyond Phase 2 investigations. Thus, while reform is helping reduce uncertainty for many deals, the full picture remains nuanced: speed gains are most evident for clearances with low antitrust risk, while high‑profile or strategically sensitive deals still require significant regulatory engagement.
Quantitative Insights: M&A Activity and Approval Trends
To understand the real impact of regulatory reform on M&A closures, it is instructive to look at recent deal figures. Across the UK and broader EMEA region, merger and acquisition activity has shown mixed results:
- UK financial services M&A activity in 2024 reached its highest volume in over a decade, with around three hundred eighty deals publicly disclosed. This represented a twenty six percent increase on 2023 volumes, and total disclosed deal value surged from £12.5 billion to £20.2 billion.
- Sector‑level data for 2025 from the IT services market shows six hundred forty‑eight deals, a slight increase from 2024’s six hundred forty‑one deals. Q4 2025 alone recorded one hundred fifty‑four completions, up from the previous quarter.
- Healthcare M&A in the UK proved resilient in 2025, with approximately two hundred eighty announced or completed transactions, even as broader M&A volumes declined in other sectors.
These quantitative trends indicate that while regulatory reform may have contributed to a more predictable approval environment, actual deal volumes are also heavily influenced by macroeconomic factors, sector dynamics, and investor confidence.
Regulatory Reform and Merger and Acquisition Financial Services
The Merger and Acquisition Financial Services sector has been a focal point for both deal activity and regulatory attention in the UK. Financial services transactions often involve complex cross‑border considerations, significant shareholder and creditor interests, and close scrutiny from both competition and financial regulators.
Enhanced regulatory clarity and targeted reforms have partly helped streamline approvals. For example, the CMA’s more structured review timelines and the introduction of clear performance indicators have reduced uncertainty for many financial services deals. Moreover, with updated thresholds under the Digital Markets, Competition and Consumers Act, certain transactions that would previously have faced protracted scrutiny may now qualify for more rapid review pathways.
However, reform does not eliminate all challenges. Deals involving systemic financial institutions or those with implications for market stability continue to attract detailed review from regulators such as the Financial Conduct Authority (FCA) and Bank of England. At the same time, regulatory coordination across competition and financial oversight regimes remains a key factor shaping deal execution timelines.
Cross‑Sector Impacts of Regulatory Change
Regulatory reform in the UK is not only affecting merger control processes but also shaping broader commercial behaviour. Firms increasingly factor regulatory timelines into their strategic planning, particularly where Phase 2 investigations or public consultations may play a role.
The evolving regulatory framework is also interacting with global trends. For instance, merger control authorities in key jurisdictions have shifted toward a more permissive enforcement stance in recent years, resulting in fewer deals blocked or abandoned due to antitrust concerns. Global figures show that the total number of deals prohibited or abandoned due to antitrust issues dropped by more than fifty percent in 2025 compared with 2024.
While this global trend reflects broader political and economic forces, it suggests that national regulators including the CMA are increasingly balancing competition enforcement with growth objectives. For the UK, this means that regulatory reform is part of a wider effort to make the country a more attractive environment for investment, provided competition is not unduly harmed.
Challenges and Ongoing Considerations
Although meaningful progress has been made in accelerating certain aspects of merger review, challenges persist. Complex transactions involving tech, healthcare, and consumer sectors continue to face intense antitrust scrutiny. These sectors often raise nuanced competition issues related to data, market power, and consumer impact, requiring detailed analysis and extensive remedies negotiations.
Moreover, the impact of broader regulatory reforms such as data protection updates under the Data (Use and Access) Act 2025 and proposals for centralising merger control decision‑making remains to be fully understood as these measures continue to be implemented and clarified by regulators.
In 2026, regulatory reform in the UK is playing a significant role in shaping mergers and acquisitions activity. While new laws and evolving CMA practices have delivered faster approvals for straightforward deals and added clarity for dealmakers, not all transactions benefit equally. Complexity, sector‑specific scrutiny, and cross‑jurisdictional considerations remain key factors influencing timelines.
For Merger and Acquisition Financial Services transactions, reform has been a welcome development, bringing greater predictability and, in many cases, reduced friction in closing deals. However, the ultimate speed of M&A closures will continue to depend on the interplay between evolving regulatory expectations, market conditions, and strategic commercial imperatives.
As UK policymakers pursue further refinements to the merger control regime and related frameworks, stakeholders in the M&A ecosystem will be closely watching whether the benefits of regulatory reform continue to outweigh procedural demands, and whether the UK can maintain its competitive edge in global dealmaking.
Finance Advisory 