Cheap UK fibre deals at risk

UK altnet providers face a £9 billion debt reckoning, putting cheap fibre deals for around 20 million homes at risk of price hikes and service disruption.

Alternative network providers, or altnets, have connected nearly 20 million UK homes to fast internet, according to Assembly Research estimates cited in the Financial Times.

These challengers raised more than £31 billion from investors, including Goldman Sachs, KKR, Warburg Pincus and Macquarie to scale up against Openreach, owned by BT, and Virgin Media O2.

Many customers signed up to deals priced well below incumbent rates, and aggressive pricing has been a defining feature of the boom.

The economics are now unravelling. Enders Analysis figures show altnets carry collective net debts of £9 billion and posted combined losses above £1.5 billion in 2024, as customer uptake failed to match ambitious business plans.

Robert Grindle, analyst at Deutsche Bank, said the rise in interest rates from very low levels a decade ago had been a major headwind, while Openreach’s accelerated fibre build, now reaching more than 22 million homes, squeezed challenger margins from above.

The result is a sector where the network exists but the returns do not.

Lenders take the hit

The reckoning is producing real losses.

Lenders to Gigaclear, including the taxpayer-backed National Wealth Fund, wrote down around 40% of their near £1 billion loan this month.

KCOM, owned by Macquarie, absorbed a hit of more than £500 million as part of a restructuring, and Macquarie could hand control to creditors if its current sale process fails.

G.Network, the London altnet, entered administration earlier this year, having just been acquired by distressed debt specialist FitzWalter Capital, which is reportedly weighing further altnet acquisitions.

Even some of the stronger players are feeling the pressure. Hyperoptic, owned by KKR and serving more than 400,000 customers, is exploring the refinancing of some loans to secure its future.

The company has already drawn around £1.04 billion of its £1.19 billion committed debt facility and is in talks with lenders over accessing the full £1.25 billion package.

By comparison, Community Fibre, backed by Warburg Pincus, plans to extend its 1.4 million premise network towards 2 million homes.

What it means for your bill

Consumers on cheap altnet contracts could ultimately bear the brunt of these losses.

The first is through price increases once introductory contracts end, as new owners push for sustainable returns:. Gigaclear customers, for example, are seeing monthly charges rise from £33 to £36 for 300Mbps.

The second is service disruption when failing providers collapse or pass to creditors, with billing systems, support desks and fault repair often degrading during transitions.

The third, and most significant over the medium term, is the structural risk that consolidation reduces competition and pushes wholesale prices upward.

That third risk is now squarely in regulators’ sights.

VMO2’s shareholders and partner InfraVia Capital struck a £2 billion deal in February to merge their Nexfibre joint venture with Netomnia, creating an altnet servicing eight million homes and beating a higher bid from Goldman Sachs backed CityFibre, which could not secure the necessary financing.

James Ratzer, analyst at New Street Research, called the deal a game changer for the UK wholesale market.

The Competition and Markets Authority will now examine whether removing Netomnia as an independent competitor allows BT and VMO2 to raise prices.

Karen Egan, Head of Telecoms at Enders Analysis, said overlapping networks between buyer and seller would prompt close scrutiny on anticompetitive effects.

Ofcom’s Director of Networks and Communications Natalie Black said the deal raises serious questions for authorities to consider, while stressing the regulator focuses on promoting sustainable competition rather than prescribing market structure.

For the millions of households that switched to altnets for cheaper monthly bills, the next 12 to 18 months will decide whether those savings survive.

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