Full-Fibre Take-Up vs Availability in the UK (2025)

Availability vs Take-Up: Two Different Metrics

Coverage figures dominate broadband policy announcements, but they measure supply, not demand. A premise "covered" by full-fibre means the network passes the door — a technician could connect it with a relatively short installation job. Whether the household at that address actually signs up for full-fibre service is a separate question, driven by price, awareness, contract terms, and whether there is any competitive reason to switch from an existing service.

Ofcom's Connected Nations 2025 data includes a take-up figure for full-fibre — specifically, the percentage of all premises in an authority (not just those with full-fibre available) that are active full-fibre subscribers. This "all premises" denominator makes take-up directly comparable to availability: if an authority has 80% availability and 40% take-up, roughly half of the addressable market has converted.

Across the 361 local authorities where Ofcom reports both metrics, the UK picture shows full-fibre availability of approximately 77.5% against a take-up of approximately 32.6% of all premises. The gap between those two numbers represents the addressable market that operators and policymakers have not yet converted.

Nation-Level Take-Up and Availability

The table below compares nation-level full-fibre availability and take-up, using live data from our database. Nation-level take-up figures are premises-weighted averages computed from local authority data.

Northern Ireland's Conversion Rate

Northern Ireland consistently shows not only the highest full-fibre availability among the four UK nations but also the highest take-up rate. The connection between the two is not coincidental. Northern Ireland's full-fibre network was built earlier than much of the rest of the UK, giving households more time to reach the end of existing contracts and switch. Where a network has been present for several years, take-up naturally tends to increase as contract renewal cycles complete and switching friction falls.

Additionally, Northern Ireland has fewer competing gigabit-capable alternatives — specifically, the Virgin Media cable network is far less prevalent there than in England. Households facing a choice between legacy copper services and full-fibre have a stronger incentive to switch than households who can already access gigabit speeds via cable.

England: High Availability, Lower Conversion

England has among the largest adoption gaps of the four nations. This reflects the relatively recent build-out of full-fibre in many English areas: Openreach only began its large-scale FTTP build in earnest around 2018-2020, meaning that many newly covered premises have not yet seen a contract renewal cycle that would prompt a switch. Additionally, in areas where Virgin Media cable delivers gigabit speeds, there is less urgency for households to switch to full-fibre — they may already have a fast connection via a different technology.

The altnet sector — independent full-fibre operators including CityFibre, Hyperoptic, Gigaclear, and dozens of smaller providers — has also built at pace in England, but take-up on altnet networks tends to lag build by 12-24 months as awareness and availability of retail products catches up with infrastructure.

Local Authorities with the Largest Adoption Gap

The authorities below have the greatest gap between full-fibre availability and full-fibre take-up (measured in percentage points). These are areas where significant full-fibre infrastructure exists but has not yet converted into subscriber numbers proportionate to coverage. 76 authorities have full-fibre availability above 70% but take-up below 30%.

Local Authorities with the Highest Take-Up

At the other end of the spectrum, some local authorities have achieved exceptional conversion rates — in a handful of cases exceeding 60% of all premises. These tend to be areas that saw early full-fibre build, combined with limited cable competition and strong commercial marketing from operators.

What Drives the Adoption Gap?

Several structural factors explain why take-up tends to lag availability:

Contract lock-in. Many households are on 18- or 24-month contracts with their existing provider. Even when full-fibre arrives in their street, they cannot switch without paying an early termination charge. Take-up rises naturally as contracts expire — which is why areas that built out earlier tend to show higher take-up today.

Cable competition. In areas where Virgin Media O2's cable network delivers gigabit speeds, full-fibre has a weaker value proposition for existing cable subscribers. A household already on a 500 Mbit/s or 1 Gbit/s cable package has limited incentive to switch to a full-fibre product at similar speeds and price. Authorities with strong cable penetration therefore tend to show lower full-fibre take-up relative to their availability.

Inertia and awareness. Broadband is a low-engagement category for most consumers. Operators report that many households do not realise full-fibre is available at their address until an installer or a door-to-door sales team alerts them. Awareness campaigns and proactive marketing have a measurable impact on conversion rates in newly-built areas.

Price sensitivity. Full-fibre products are sometimes priced at a premium to FTTC superfast packages, particularly at launch. Where the price gap is significant, value-conscious households may defer switching until promotions or market competition bring prices down.

Data Source and Methodology

All figures in this article are drawn directly from our database, which ingests Ofcom's Connected Nations 2025 (July 2025, reference r01) local authority data. The take-up metric used is full_fibre_takeup_all_pct — the percentage of all premises (not just those covered) that are active full-fibre subscribers. Adoption gap is computed as full_fibre_pct minus full_fibre_takeup_all_pct at query time. No values have been interpolated, projected, or modified. See our full methodology for details.