CMA Flags Competition Concerns Over £2bn Netomnia Deal - What It Means for UK Broadband Buyers

The Competition and Markets Authority published preliminary Phase 2 findings on 2 October 2026 concluding that nexfibre’s £2bn acquisition of rival full fibre network Netomnia amounts to a relevant merger situation that “may be expected to result in a substantial lessening of competition” in the wholesale supply of fixed broadband services. That phrase is the statutory test, and the CMA finding it met at this stage is significant — but the findings are explicitly preliminary, not final. nexfibre’s shareholders dispute that the interim report reflects the full competitive picture, and concessions could still be negotiated to allow the deal to proceed in some form.

For a UK business buying connectivity, the temptation is to file this under corporate news and move on. There is a better use for it. nexfibre shares parentage with Virgin Media O2 — it is backed by Liberty Global, Telefónica and InfraVia Capital — and Netomnia, parent of the retail brand YouFibre, had built full fibre to around 3.4 million premises by completion. Rival CityFibre, which tried to buy Netomnia itself before nexfibre’s offer won out, warns the deal could return the UK to a broadband duopoly between Virgin/nexfibre and Openreach. Whether or not this particular transaction completes, the direction of travel it represents is not in doubt, and the window in which a business can exploit genuine wholesale competition at its own postcodes is a window that closes. The actionable part of this story is about the trend, not the deal.

What the CMA has found, and what it has not

The finding is that the transaction “may be expected to result in a substantial lessening of competition” in the wholesale supply of fixed broadband services. Three things in that sentence deserve attention. “May be expected to” is the forward–looking statutory language rather than a finding of present harm. “Substantial lessening of competition” is the legal test a merger must not meet. And wholesale is the market being examined — not the retail market where consumers buy a broadband package, but the layer beneath it, where internet service providers buy access to somebody else’s fibre in order to sell a service at all.

That wholesale focus is why this matters more to business buyers than a retail competition story would. A great many UK business broadband and Ethernet services are sold by providers who do not own the fibre they run over. When the number of independent wholesale networks at a given address falls, the retail brands may still look plentiful while the actual underlying choice narrows — and pricing, contract terms and service levels in that market are set by what the wholesale layer will bear.

The procedural route is unusual enough to be worth explaining, because it tells you something about how the parties saw their own position. nexfibre’s parents fast–tracked the deal straight into Phase 2 rather than going through a standard Phase 1 review. That is a deliberate choice, and it is not a shortcut: the route itself requires evidence that the legal test for a Phase 2 reference is met. In other words, the parties accepted up front that the deal raised issues warranting the deeper investigation, and opted to get to that investigation faster rather than contest a Phase 1 decision first.

The deal structure explains both the scale and the complexity. nexfibre’s parents are committing £1bn in new funding. VMO2 will acquire Netomnia’s YouFibre retail customer base — about 500,000 customers — for £150m. And VMO2 will receive around £1.1bn in cash plus an indirect 15% stake in nexfibre, in exchange for a wholesale traffic commitment covering 4.6 million premises. The last element is the one competition analysts will spend most time on, because a long–term commitment to put traffic onto a particular network is precisely the kind of arrangement that shapes how much genuine wholesale competition exists afterwards.

CityFibre’s objection should be reported alongside its interest. It warned the deal would “significantly reduce competition and the choice available to consumers” and could force hundreds of thousands of Netomnia customers back onto VMO2, raising the prospect of a return to a duopoly between Virgin/nexfibre and Openreach. That is a substantive argument and it is also made by a company that attempted to acquire Netomnia itself and lost. Both facts are true, and a reader is entitled to weigh the argument knowing the interest behind it — which does not make it wrong, since a losing bidder is often the party with the clearest view of what the winning bid changes.

How the deal reached this point

The sequence below follows what has been reported. Most of the consequential dates are still ahead of it, which is the main thing a business planning its connectivity should take from the chronology.

The useful reading of that timeline for a business is the first entry rather than the last. The period in which many UK addresses gained genuine wholesale choice was the product of a capital–intensive build–out phase, and build–out phases in infrastructure are followed by consolidation phases with considerable reliability. Whether the CMA clears this deal, blocks it or extracts undertakings, the broader altnet sector is in the part of its lifecycle where the number of independent owners falls. Planning on the assumption that today’s choice persists for the length of a five–year contract is the mistake worth avoiding.

What choice at your postcode is actually worth

The chart below is an indicative planning model — not measured data — expressing how much commercial leverage a UK business typically has when negotiating connectivity, according to how many independent wholesale networks serve its address.

The shape of that curve explains why the CMA’s focus on overbuild is the right one. Removing a competitor in an area where two networks both reach the premises moves the address from the third row towards the fifth, and the drop between those is steep. Removing a competitor in an area where only one of them ever built changes nothing for the customer, because there was no choice there to lose. That is why the 832,000 overlapping FTTP premises matter more to the analysis than Netomnia’s 3.4 million total — and why Virgin’s older HFC footprint, which adds significantly more overlap, pushes the figure the CMA is weighing higher still.

The fourth row is the one business buyers most often misjudge. Having two networks available is worth considerably less if one of them is the incumbent you are already contracted to, because the credible alternative is a single supplier and both parties know it. Leverage comes from a genuine, deliverable alternative at a known price, not from theoretical availability — which is why the single most useful thing in a renewal is a current, written quote from a second network that could actually install.

The overlap figure at the heart of the case

Set the overbuild against Netomnia’s total footprint and you get the ratio the competition analysis turns on.

That quarter is where the merger does its competitive work. In the other three quarters of Netomnia’s footprint, nexfibre and Virgin Media had not built, so a customer there loses nothing in terms of the number of networks reaching their door — the ownership changes but the count does not. In the overlapping quarter, two independent networks become one owner. Across roughly 832,000 premises on fibre alone, and more once cable is included, that is the removal of a competitor from addresses that currently have a genuine choice, which is precisely the condition the “substantial lessening of competition” test is designed to catch.

It is also worth stating the argument on the other side, because the CMA will be weighing it and nexfibre’s shareholders have disputed that the interim report reflects the full picture. Consolidation arguments in infrastructure are not frivolous. Overbuilding the same street with two fibre networks is economically wasteful; altnets have struggled to reach the scale and funding required to compete sustainably; a combined entity with £1bn of new parental funding may build further, faster and to more of the premises nobody has reached yet. The question a competition authority has to answer is whether that prospective benefit outweighs the loss of rivalry in the overlap — which is a genuine judgement rather than an obvious one, and is why Phase 2 investigations take the time they do.

The wholesale traffic commitment covering 4.6 million premises is the element most likely to attract remedies if the deal proceeds. Commitments of that kind determine where a large retail operator’s traffic flows for years, which affects the volumes available to other wholesale networks and therefore their ability to compete. If undertakings are negotiated, the shape of that commitment — its duration, its exclusivity, the access terms offered to third parties — is a likely subject, more so than the ownership of fibre in the ground.

Where UK businesses are exposed on connectivity procurement

The rows below reflect where this risk typically sits for a UK business, with badges indicating how much attention each usually needs. Note that none of it depends on how the CMA decides.

The fourth row is the one with a resilience consequence rather than a commercial one, and it is remarkably common. A business that has bought two circuits from two retail providers for redundancy may find both are delivered over the same underlying wholesale network, which means a fault, a maintenance error or a corporate event affecting that network takes out both paths simultaneously. Consolidation makes this more likely rather than less, because fewer wholesale owners means a higher chance that any two retail services share one. Establishing which network each circuit actually rides is a question you can put to your supplier in writing, and the answer is the difference between genuine diversity and a second invoice.

The fifth row is the foundation for all of it. Most businesses know the brand on the invoice and not the network beneath it, which makes them unable to answer either of the questions that matter: whether their redundancy is real, and whether a consolidation event affects them. It is a single question to a supplier and worth asking of every circuit you hold — particularly now, when ownership in the altnet sector is actively changing.

What a connectivity review costs

The bands below are indicative planning figures for UK businesses reviewing their connectivity position — not quotes. None of this is contingent on the CMA’s decision.

The honest observation about this table is that the first and last rows cover most readers, and both are close to free. There is no capital project implied by a competition investigation. What there is, is a timing argument: the actions above are worth more while choice exists than after it narrows, and the one that expires is the ability to sign terms now that reflect today’s competitive conditions rather than a thinner market’s. A business whose contract runs to 2031 has already made its decision about the 2031 market, whether or not it realised it was doing so.

Two ways to buy business connectivity

Nothing in the right–hand column requires a prediction about the CMA, and that is deliberate. Every item is worth doing if the deal is blocked, if it is cleared, and if it is cleared with undertakings. What the investigation supplies is not a reason to act differently but a prompt to do the ordinary work at the moment when it is worth most — which is while an alternative network is still an independent company that wants your business.

Why this matters beyond one transaction

The UK’s altnet sector was built on a wave of infrastructure capital, and it produced something genuinely valuable: for the first time, a large number of UK addresses had more than two choices of underlying network. Businesses that noticed found better prices, shorter installation times and more willing negotiation than the previous market offered. That phase is maturing, and maturing markets in capital–intensive infrastructure consolidate — not because anyone behaves badly, but because overbuilding the same streets is wasteful and sub–scale operators struggle to fund continued expansion. The nexfibre–Netomnia transaction is one instance of a pattern, not an isolated event.

That is why the planning advice here is deliberately independent of the outcome. If the CMA blocks the deal, consolidation pressure in the sector does not disappear. If it clears it with undertakings on the wholesale traffic commitment, the broader trend continues with one more precedent attached. Either way, a business signing a five–year connectivity contract in late 2026 is making an implicit bet on the competitive conditions of 2031, and the only sensible response is to make that bet knowingly — weighing the discount offered for a long term against the value of being able to move in a market that may have fewer participants.

There is a resilience dimension that compounds the commercial one, and it deserves more attention than it gets. As the number of independent wholesale networks falls, the probability that any two retail services share an underlying network rises. A business that bought redundancy from two suppliers in 2024 may find, after a round of consolidation, that both now ride the same infrastructure — without anything changing on either invoice. This is the same shared–failure–mode question the networking industry has worked through at the exchange layer, where real independence means not sharing a duct, a backhaul path or a corporate owner. Verifying it periodically, rather than once at purchase, is the only way to keep the answer current.

For organisations with a virtual CIO arrangement or anyone doing that thinking internally, this is the shape of decision such an engagement exists to catch. It has no deadline, no incident and no obvious owner. It is a judgement about contract duration and supplier concentration whose consequences land three to five years out, long after whoever signed has moved on. That is precisely the category of decision organisations make badly by default — not through negligence, but because nothing in a normal management cycle brings it to anyone’s attention until the renewal letter arrives.

The story at a glance

This story connects to several we have covered recently, and together they describe the same supplier–concentration argument from different angles. VMO2’s cost cuts and the continuity risk they create is the essential companion, since VMO2 shares parentage with nexfibre and is a direct beneficiary of this deal’s structure — a reminder that the commercial health of the company behind your circuit is a legitimate procurement question. Microsoft’s maintenance breaking Azure hybrid connectivity in 18 regions makes the shared–failure–mode point in the cloud layer: two products from one provider are not two independent paths, which is exactly the trap a business with two circuits on one wholesale network falls into. The JadePuffer attackers hijacking Azure identities applies the same logic to backups sharing a credential with production. The actively exploited Citrix NetScaler flaws concern the appliances that terminate these circuits. And Ofcom’s AI ground rules for telecoms speak to what reaching a human at a very large provider looks like once the market has fewer of them.

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