Sustained decline: UK broadband trends Q3 2025

Altnet losses expanded to £1.5bn in 2024, as EBITDA losses persisted and interest costs rose sharply, with ARPUs weakening and operating costs stubbornly high, and the increasing interest burden looking unpayable under any reasonable scenario.

Even the best performing altnets can barely make EBITDA breakeven, and not make sufficient margins to cover ongoing customer acquisition investment, resulting in a perpetual cash drain for their investors.

The impact on the rest of the sector is worsening in the short term as pricing falls, but this should accelerate the inevitable consolidation into a sustainable wholesale model under CityFibre and/or VMO2/nexfibre.

Broadband market revenue dipped back into negative territory in Q2, due to pricing pressure on both existing and new customers.

CityFibre’s capital raise puts it in pole position for altnet consolidation, while TalkTalk’s will enable it to compete much more effectively in the retail space.

Fierce competition is likely to continue unless and until retail altnets do the rational thing and consolidate into a wholesale model.

CityFibre has announced that its long-awaited £1.5 to £2.3 billion financing round is finally agreed, with it now able to use this money to fund its remaining organic build, integrating acquisitions, and covering operating losses until it reaches cashflow breakeven.

This capital raise will not be the first of many across the altnet sector in our view, as CityFibre’s business model is unique, and now partially dependent on the struggles of others to encourage consolidation.

CityFibre now has all the pieces in place to accelerate consolidation of the altnet sector, which will ultimately benefit the whole sector in ending unsustainable retail altnet competition.

Fixing an allocation quirk at BT pushed UK broadband revenue back into growth in Q1, albeit a very modest 0.8%, thanks to continued altnet growth and a very weak underlying market.

Broadband pricing is dipping down overall, but there is not yet evidence of pricing cuts targeted in altnet areas, a massive missed opportunity in our view.

The market will remain under pressure in the short term, but in the longer term altnet pressure will fall under all realistic consolidation scenarios.
 

The largest UK altnets are now all at or close to EBITDA positive, but still heavily cashflow negative even pre-interest costs and with paused builds, due to various below-the-line cash costs requiring continuous funding. EBITDA margins of as much as 35%+ are required to actually be cashflow breakeven.

Altnet economics are still challenging even if debts are fully written off, with a payback of more than 5 years on customer acquisition and connection costs alone.

The consolidation endgame is increasingly imminent, with the outcome likely to be a mix of CityFibre/VMO2 acquisitions, stand-alone niche players continuing, and abandoned assets, with the outcome for the rest of the sector more benign under any scenario than current trends.