Google may have to make changes in the UK so people have more choice over which search engine they use, following a landmark decision from the regulator.

The Competition and Markets Authority (CMA) has designated Google with “strategic market status” under a law which came into force in January.

The decision does not mean the regulator has found wrongdoing at this stage.

Instead, it opens the door to what it called “proportionate, targeted interventions” to ensure the market is competitive.

Google has warned against any measures which its says might “inhibit UK innovation and growth.”

The CMA said it expected to begin a consultation on what changes might be introduced later in 2025.

In response to the announcement, Google has attempted to emphasise what it sees as the advantages of the regulatory status quo.

“UK businesses and consumers have been amongst the first to benefit from Google’s innovations, often months before their European counterparts,” Google’s competition boss Oliver Bethell wrote in a blog post.

“As a result, they see significant value: Google Search contributes billions of pounds a year to the UK economy — £118 billion in 2023 alone.

“Many of the ideas for interventions that have been raised in this process would inhibit UK innovation and growth, potentially slowing product launches at a time of profound AI-based innovation.”

The CMA said Google’s market dominance was unquestionable.

“We have found that Google maintains a strategic position in the search and search advertising sector – with more than 90% of searches in the UK taking place on its platform,” CMA digital markets boss Will Hayter said.

“Having taken into account the feedback received following our proposed decision, we have today designated Google’s search services with strategic market status.”

The CMA previously unveiled what it called a “roadmap” of potential measures it could take if Google was found to have significant market status.

It said it could potentially force the tech giant to include “choice screens” which would let users see alternative search providers, as well as giving publishers more control over how their content was used.

It also included what it called “fair principles” for how websites are ranked in search results, and an “effective complaints process” for businesses unhappy about their listing.

The move has been well-received by consumer groups, with Which? policy boss Rocio Concha calling it “an important step”.

“The CMA’s careful evidence gathering makes a compelling argument,” she said.

“Online search is evolving as GenAI tools become more widely used, but the CMA must still act to tackle the harmful dominance Google has now.”