The Competition and Markets Authority is starting to sound less like a regulator describing future powers and more like one using them. In a speech published on 7 September 2026, Will Hayter said the UK’s digital markets regime has moved from roadmap to enforcement, with Google search, Apple and Google mobile rules, and Microsoft’s business software case serving as the first real tests of the system. (gov.uk) Hayter opened with a Josh Kerr analogy, but the stronger business point was simpler: the CMA wants firms and investors to see a pattern of public planning, consultation and then action. For companies that depend on search traffic, app stores or cloud contracts, that promise of predictability matters almost as much as the measures themselves. (gov.uk)

According to IPPR’s Bottleneck Britain report and its related briefing, concern about the market power of large technology companies now ranks ahead of access to finance and talent for many UK businesses that rely on digital platforms and infrastructure. IPPR said 79 per cent of such firms were concerned about dominant tech companies limiting competition, based on Opinium polling of 417 businesses carried out between 26 June and 3 July 2026. (ippr.org) That finding helps explain why the debate has widened beyond classic consumer issues. For a retailer buying ads, a publisher relying on search referrals, or a software company trying to reach iPhone users, platform power is not an abstract competition-law argument; it can affect customer acquisition costs, product design and room to expand. This is an inference from the sectors the CMA itself says are exposed to these markets. (gov.uk)

The legal basis is now settled. Under the Digital Markets, Competition and Consumers Act 2024, the CMA can designate a firm as having strategic market status, or SMS, for a specific digital activity and then impose conduct requirements or other interventions where it believes competition needs help. The regime came into force on 1 January 2025. (legislation.gov.uk) Hayter’s defence of the system also tracks the government’s strategic steer to the CMA, published in May 2025, which says the authority should act in a way that is swift, predictable, independent and proportionate. In plain English, the regulator is arguing that big tech oversight should be active, but not theatrical, and that remedies should be targeted rather than sweeping. (gov.uk)

Search is where the regime looks most advanced. The CMA designated Google with SMS in general search and search advertising, imposed a publisher conduct requirement on 3 June 2026, and added fair-ranking and data-portability requirements on 17 June. A separate decision on user choice is still pending after consultation. (gov.uk) For publishers, the immediate commercial issue is bargaining power and attribution, especially where AI-generated search results use or summarise their material. For consumer brands and merchants, the broader point is whether ranking, traffic flows and data access are governed by clearer rules that can be tested, instead of by opaque platform choices. (gov.uk)

Mobile is next, and the business stakes are easier to see than the jargon suggests. The CMA began consulting on proposed steering conduct requirements for Apple and Google on 30 June 2026, while earlier commitments from both firms took effect on 1 April 2026 covering app review, app ranking and use of developer data, plus an interoperability process on Apple’s side. (gov.uk) Why does that matter? Steering rules affect whether an app can guide a user to pay outside the platform’s own billing route, which feeds straight into margins. Access to the iPhone’s NFC chip matters for banks and fintechs that want to offer tap-to-pay services without accepting terms set entirely by the platform owner. That is why this story sits squarely in business reporting, not just on a regulation page. (gov.uk)

Cloud and business software may prove even more important for medium-sized organisations, because the contracts are larger, the switching costs are heavier and the public sector is heavily exposed. The CMA opened an SMS investigation into Microsoft’s business software activities on 14 May 2026 and said it would examine Microsoft’s position in business software and the effect on UK businesses and public sector bodies, including issues such as bundling, interoperability and default settings. (gov.uk) The authority says cloud licensing is being considered within that wider Microsoft case, while a separate voluntary process with Amazon and Microsoft has already produced changes aimed at better interoperability and multi-cloud use. For finance directors, the practical question is whether this leads to easier switching and less contract lock-in, rather than another round of consultation that changes little on the invoice. (gov.uk)

A useful feature of Hayter’s argument is that he did not present proportionality as a synonym for caution. The CMA’s position is that interventions on the largest platforms can carry real costs, so the test should be whether the benefits to competition, investment and household prosperity outweigh those burdens. That principle is written into both the government’s steer and the logic of the 2024 Act. (gov.uk) He also defended a more participative model, with consultation and negotiated commitments sitting alongside formal orders. That approach may suit firms that want clearer notice before rules harden, but it comes with a clear standard for the CMA: if compliance reports and transparency updates due later in September 2026 show weak progress, critics will expect a faster move from voluntary fixes to firmer enforcement. (gov.uk)

For UK businesses, the real measure of success will not be the speech itself. It will be whether publishers get a fairer deal in search, whether app developers see more workable commercial terms, whether fintechs can reach iPhone users on more even footing, and whether cloud customers gain genuine freedom to mix suppliers or move away. (gov.uk) That is the shift worth watching. Digital competition policy is no longer a specialist argument tucked away in consultation papers; it is moving into pricing, margins, procurement and growth planning. The CMA says it is on schedule. Over the next few quarters, UK firms and consumers will be able to judge whether that timetable delivers measurable benefits. (gov.uk)