By Adrian James, Broadband Editor (LinkedIn) · Reviewed by Dr Alex J. Martin-Smith, Head of Editorial (LinkedIn) · Last updated 30 June 2026
In short: the UK's smaller fibre networks, the altnets, are going through a wave of mergers and the odd financial wobble, which is unsettling if your broadband runs over one of them. The reassuring news is that the fibre itself does not vanish. When an altnet runs into trouble it is usually sold or restructured rather than simply switched off, and customer contracts normally carry over to the new owner instead of being cancelled. The real risk is disruption and uncertainty during the handover, not losing your line overnight. Knowing your switching rights means you can move if the service slips.
Why altnets are in the headlines in 2026
Over the past few years dozens of alternative networks borrowed heavily to build full fibre and compete with Openreach. That building boom is now cooling, and the market has shifted from a build phase to a buy phase, with bigger players absorbing smaller ones (Assembly Research, 2026; Bratby Law, 18 February 2026). Coverage is real and substantial: altnets reached roughly 19.7 million UK premises, outside the Openreach and Virgin Media O2 footprints, by the end of 2025 (INCA, 2026).
Two recent events show the range of outcomes. G.Network entered administration in January 2026 before being reorganised under new ownership, so the network kept running under new control (Assembly Research, via Capacity, 2026). Gigaclear completed a recapitalisation in April 2026 that kept it going while delivering an estimated 40 percent reduction to what its lenders were owed (Assembly Research, via Capacity, 2026). In both cases the network continued to operate.
The biggest move is a merger. On 18 February 2026 nexfibre, the joint venture backed by Liberty Global, Telefónica and InfraVia, announced a deal worth around 2 billion pounds to acquire Substantial Group, the owner of Netomnia and its retail brands YouFibre and brsk, a network covering about 3 million premises and rising towards 3.4 million premises and 500,000 customers by the time the deal completes (ISPreview, May 2026). On completion, the YouFibre and brsk retail brands are due to transfer to Virgin Media O2 for 150 million pounds (ISPreview, May 2026).
That deal is not done. The Competition and Markets Authority opened an invitation to comment on 23 April 2026, with comments closing on 8 May 2026 (CMA, 23 April 2026). As of late June 2026 the CMA had not yet opened a formal Phase 1 investigation, and the deal was expected to complete by the third quarter of 2026 subject to regulatory clearance (CMA, 2026; thinkbroadband, June 2026). Rival network CityFibre has objected, pointing to roughly 80 percent overlap between the two networks and the risk of reduced competition, and Ofcom has indicated it wants the CMA to examine the deal closely (ISPreview, 2026).
So what actually happens to your service?
Here is the key thing to hold on to. A broadband network is a physical asset, fibre in the ground and on poles, and that asset has value, so when a company gets into difficulty the usual outcome is that the network and its customers are sold or restructured rather than abandoned. In practice this has meant continuity for customers: G.Network kept running under new ownership, and the YouFibre and brsk customer bases are set to move to a new owner rather than be cut off.
For you, that normally translates into the following. Your contract usually transfers to the new owner on the same terms rather than being torn up. Your service usually keeps running throughout, because switching off a working network destroys the very value an administrator or buyer is trying to preserve. Prices rarely jump the moment a deal is announced, although a new owner can change pricing in the future in line with your contract terms. The genuine risks are softer: a period of uncertainty, possible changes to billing systems or branding, and the small chance of service hiccups during a transition.
What to do if your provider is acquired or enters administration
- Keep paying as normal. Unless an administrator or the new owner tells you otherwise in writing, keep your direct debit running. Cancelling it unilaterally can put you in breach and complicate the handover.
- Watch the official channels. Read messages that come directly from your provider or the named administrator, and be wary of anyone contacting you out of the blue to demand a new payment or new bank details. Periods of corporate change are exactly when impersonation scams appear.
- Keep your paperwork. Save your contract, recent bills and any notices about the change. If anything is disputed later, your records are what protect you. Payments made by direct debit are also covered by the Direct Debit Guarantee, which gives you a refund route if a payment is ever taken in error.
- Check whether your terms change. If the new owner proposes a change to price or terms, read what they send carefully, because a material change can sometimes open a right to leave without penalty depending on the circumstances.
- Know your exit route. If the service genuinely deteriorates, you are not trapped. One Touch Switch lets you move to another provider, and our guide on which providers use the Openreach network helps you line up an alternative at your address.
See which providers and networks reach your postcode
Should you avoid altnets altogether?
No, and that would often mean turning down the fastest or best-value line on your street. Many altnets offer excellent full fibre, and the financial pressures are felt by the companies and their lenders far more than by everyday customers, whose service typically continues through any change of ownership. The sensible approach is to buy on the merits, the speed, price and reviews available at your address, while keeping an eye on the bigger picture and knowing you can switch if you ever need to. For context on how the wider market is structured, see our guide to which providers use the Openreach network, and if you do decide to move, our guide to what to do if a switch goes wrong has you covered.
A note on timing
This is a fast-moving area. The figures and deal status above are accurate as of late June 2026, and the nexfibre and Netomnia merger in particular was still awaiting a CMA decision at the time of writing. Treat any specific deal as a snapshot, and check the latest position before making a decision that depends on it.
Compare full-fibre deals at your postcode
Frequently asked questions
If my broadband provider goes into administration, will my internet stop?
Usually not. The network is a valuable physical asset, so administration normally leads to the business being sold or restructured with the service kept running, rather than switched off. Recent UK cases have seen networks continue to operate under new ownership.
What happens to my contract if my altnet is bought by another company?
Your contract normally transfers to the new owner on the same terms rather than being cancelled. A new owner can change pricing or terms in the future in line with your contract, but it does not automatically wipe out your existing agreement.
Will my price go up straight away?
Prices rarely change the moment a deal is announced. Any future change would follow your contract terms, and a material change to price or terms can sometimes give you a right to leave without penalty depending on the circumstances.
Should I cancel my direct debit if I hear my provider is in trouble?
No. Keep your direct debit running unless the provider or a named administrator tells you otherwise in writing. Payments by direct debit are protected by the Direct Debit Guarantee, which gives you a refund route if a payment is taken in error.
Can I switch away if I am worried?
Yes. You can move to another provider using One Touch Switch. Check which networks and providers are available at your address first so you have an alternative lined up, especially if your current service starts to slip.
Is it risky to sign up with an altnet right now?
Signing up is generally low risk for everyday customers, because service typically continues through any change of ownership. Buy on the speed, price and reviews available at your address, and keep in mind that you can switch later if you need to.
Sources
- Competition and Markets Authority. (2026, 23 April). nexfibre / Substantial merger inquiry (invitation to comment; comments closed 8 May 2026; no formal Phase 1 investigation opened as of late June 2026). Retrieved 30 June 2026.
- ISPreview. (2026, May). Coverage of the nexfibre acquisition of Substantial Group (Netomnia, YouFibre, brsk); network of approximately 3 million premises rising towards 3.4 million and 500,000 customers; YouFibre and brsk retail brands to transfer to Virgin Media O2 for 150 million pounds. Retrieved 30 June 2026.
- Assembly Research, via Capacity. (2026). UK full-fibre consolidation; G.Network administration and reorganisation (January 2026); Gigaclear recapitalisation (April 2026); financial position of the eight largest altnets. Retrieved 30 June 2026.
- thinkbroadband. (2026, June). Status of the nexfibre and Netomnia transaction and UK full-fibre market. Retrieved 30 June 2026.
- INCA (Independent Networks Cooperative Association). (2026). UK altnet premises coverage of approximately 19.7 million by end of 2025. Retrieved 30 June 2026.
General consumer information, accurate as of late June 2026. Corporate deals and their regulatory status change quickly; this is not legal or financial advice. Check the latest position and your own contract before acting.