The UK's competition regulator has raised concerns that a £2 billion broadband deal could leave businesses and consumers with fewer choices. The Competition and Markets Authority (CMA) said on [date] that Nexfibre's planned takeover of Substantial Group, the owner of fibre network builders Netomnia and Brsk, could "substantially reduce competition" in the wholesale broadband market.
The CMA has given the two companies 14 days to propose remedies to address its concerns. If no acceptable fix is offered, the deal could face a deeper investigation or be blocked.
What is the deal?
Nexfibre is a joint venture backed by Telefónica, Liberty Global, and InfraVia Capital Partners. It builds and operates full-fibre networks, selling access to internet service providers (ISPs) like Vodafone and others. In February, Nexfibre agreed to buy Substantial Group, which owns Netomnia and Brsk, two companies that also build and operate fibre networks in the UK.
The companies have said the deal would help fund more broadband rollout across the country, especially in areas that are still underserved. But the CMA, which launched an in-depth review in July, has now issued "provisional" findings that the merger could harm competition in the wholesale market—the market where network owners sell access to ISPs.
Wholesale broadband is the backbone of the internet. When you sign up for a broadband package, your ISP (like BT, Sky, or Vodafone) often buys access to a network owned by someone else—such as Openreach, Virgin Media O2, or Nexfibre. If one company controls too much of that wholesale market, it could raise prices or reduce service quality, and those costs could be passed on to you.
Why the CMA is worried
The CMA's concern is that Nexfibre and Substantial Group are two of the main challengers to BT's Openreach, which dominates the UK's broadband infrastructure. By combining, they would create a larger player that could compete more effectively with Openreach—but the regulator worries that the merger would remove a significant competitor from the market.
In particular, the CMA is looking at areas where both Nexfibre and Netomnia/Brsk are building or planning to build networks. In those areas, the two companies would no longer compete against each other, potentially leading to higher prices or less innovation.
This is a common issue in merger reviews: regulators often worry about "horizontal" overlaps, where two companies that would otherwise compete decide to join forces. The CMA has been increasingly active in scrutinising tech and telecom deals, and this is another example of that trend.
What happens next?
The companies now have 14 days to propose remedies. These could include selling off parts of the business, committing to open up their network to rivals, or other measures to preserve competition. If the CMA accepts the remedies, the deal can go ahead. If not, the regulator could refer the deal to a full Phase 2 investigation, which would be a more detailed and lengthy review.
For investors, this is a key development to watch. The deal was seen as a way for Nexfibre to scale up and challenge Openreach more effectively. If it is blocked or delayed, it could affect the companies' growth plans and the broader UK broadband market.
What it means for investors
For everyday investors, this news is a reminder that big deals often face regulatory hurdles. Even if a merger makes strategic sense for the companies involved, regulators can step in if they think it will harm consumers or competition.
If you hold shares in any of the companies involved—Telefónica, Liberty Global, or InfraVia—this could affect the value of the deal and the expected synergies. But it's also a signal about the UK's regulatory environment: the CMA is willing to scrutinise deals in the telecom sector, which could impact other potential mergers in the future.
For the broader market, this is part of a pattern of increased regulatory scrutiny of big deals, especially in tech and infrastructure. Investors should be aware that even well-announced deals can face delays or be blocked, which can create uncertainty and affect share prices.
The CMA's provisional findings are not final, and the companies have a chance to respond. But the clock is ticking, and the next two weeks will be crucial in determining whether this £2 billion deal goes through.
