UK regulator enforces new regulations on Google search, including an option for AI training opt-out.

      Britain’s competition regulator has shifted from consultation to action. On Wednesday, the Competition and Markets Authority (CMA) enforced new conduct requirements on Google’s search services, marking the first definitive obligations resulting from its decision to classify the company as having strategic market status.

      Among these obligations is a significant provision for the AI age: publishers will now have the option to exclude their content from training Google’s AI models. Google’s search results increasingly summarize online content instead of directing users to various websites, with these summaries based on content the company gathers for ranking purposes. Publishers have claimed they are caught in a dilemma: if they reject the crawl, they become invisible in search results, but if they permit it, they inadvertently support the AI systems that diminish their visitor traffic. The CMA’s new rule aims to alleviate this predicament by allowing a site to appear in search results without consenting to AI training.

      The remaining aspects of the package are structural in nature. The CMA’s mandates enforce fair ranking, transparency, proper content attribution, and default choice screens on Android and Chrome, enabling users to select competing search services instead of automatically using Google’s. These choice screens have been seen in EU antitrust efforts for the past decade; their inclusion here indicates the CMA plans to implement effective measures that have succeeded elsewhere.

      The legal framework sets this process apart from a straightforward case. Under the UK’s Digital Markets, Competition and Consumers regime, the CMA can classify a company with strategic market status in a digital sector and impose tailored, ongoing conduct requirements, instead of addressing each violation individually through litigation.

      The CMA confirmed Google’s SMS designation in search in October 2025, initiated a consultation on conduct requirements in January 2026, and has now proceeded to enforcement.

      This format differs from the approach taken in the United States. While US antitrust actions against Google progress through the courts, addressing remedies on a case-by-case basis over extended periods, the UK system is regulatory and anticipatory: a designated company is bound by a standing set of obligations that a regulator can modify. This trade-off is well understood.

      The regulatory approach is quicker and more adaptable; however, it also places significant discretion in the hands of the regulator, and Brussels has often established rules before determining what enforcement will entail in practice.

      For Google, these requirements come at a time when its search business is already facing challenges that traditional antitrust measures do not address. AI assistants and chat interfaces are emerging as alternatives to conventional search results, and the CMA’s rules implicitly recognize that both competitive threats and regulatory considerations are now tied to AI. The opt-out provision particularly reflects issues surrounding control over the training data for future interfaces rather than classic search competition.

      Google has maintained that its services are beneficial to users and that stringent rules could harm them, a position it is likely to reiterate in this instance. The company has avenues to contest specific aspects, and the details regarding compliance, the functionality of the opt-out, and the design of choice screens often determine the success or failure of such regimes.

      What remains clear is the established direction. The UK has developed a consistent regulatory relationship with Google’s search operations and has now applied it for the first time. The pressing question is whether the AI-training opt-out can be operationalized without inadvertently pushing publishers out of search through other means. The CMA has established the rule; however, the enforcement details are still in development.