Britain’s fibre market is entering a more difficult commercial phase, and Ofcom is preparing to intervene where lower wholesale prices could weaken the networks responsible for creating competition in the first place.

Ofcom has provisionally proposed directing Openreach to withdraw its Incremental New to Openreach Offer. The scheme would give internet service providers a monthly discount of up to £9.50 for each qualifying new full-fibre customer above their normal level of additions, with support lasting as long as 30 months.

The regulator is not objecting to every commercial offer notified by Openreach. Its concern is that this proposal concentrates substantial discounts on customers who might otherwise join rival networks, allowing the operator with significant market power to defend contested areas more aggressively than smaller infrastructure businesses can manage.

A consultation remains open until 27 August, and Ofcom expects to issue a final decision by the end of September. No direction has yet been made.

Coverage has given way to customer acquisition

Full-fibre construction has expanded rapidly across the UK, with Openreach, Virgin Media O2, CityFibre, Hyperoptic, and numerous alternative networks investing in overlapping footprints. For several years, the industry’s preferred measure of progress was the number of premises a network had passed.

Coverage alone does not repay debt or construction costs, and roughly half of premises able to buy full fibre have yet to subscribe. Operators now need households and businesses to switch, placing pricing, wholesale agreements, installation performance, and service-provider relationships at the centre of the market.

Openreach argues that commercial offers can encourage migration from copper and stimulate full-fibre adoption. Lower wholesale prices may reach customers, while faster migration can allow older infrastructure to be retired.

Alternative networks counter that selective discounts from the dominant wholesale operator can undermine their business cases when they need revenue most. Many financed construction on the assumption that Openreach would be prevented from using its scale to target contested customers in ways emerging operators could not match.

Regulatory consistency influences the cost of capital

Ofcom’s intervention would be the first time it has blocked an Openreach commercial offer through the relevant notification process, giving the decision significance beyond the specific discount.

Infrastructure investors assess returns over long periods, while wholesale promotions can alter customer economics within months. Uncertain regulatory boundaries raise the risk attached to fibre projects, increasing financing costs or reducing the capital available for expansion.

Protecting every alternative network would not constitute coherent competition policy. Some businesses have built in weak locations, accumulated unsustainable debt, or failed to turn infrastructure into reliable service and customer demand. Regulation is intended to preserve effective rivalry rather than guaranteeing the survival of each operator.

Ofcom must therefore distinguish ordinary price competition from conduct that uses entrenched market power to weaken competing infrastructure. The incremental design of the offer is central to that judgement because the largest reductions are attached to customer growth above an established baseline rather than applied consistently across Openreach’s wholesale base.

The customer interest is similarly divided. Blocking a discount can produce higher near term wholesale prices, while allowing it could reduce the number of viable networks and weaken competitive pressure after consolidation. Ofcom’s position is that sustainable network rivalry can deliver lower prices and better service over a longer period.

The consultation arrives as alternative networks are cutting construction plans, refinancing debt, combining assets, and concentrating on take-up. Openreach retains national reach, long-standing relationships with service providers, and an ability to spread investment across a much larger base.

Ofcom’s final decision will reveal how far it is prepared to protect the conditions under which fibre competition was financed. The immediate dispute concerns a monthly discount, although the outcome will help determine whether Britain still expects several fixed networks to remain commercially credible once the digging slows.