UK Full-Fibre Coverage by Nation, 2025

Coverage by Nation

The four nations of the UK show strikingly different broadband infrastructure profiles. The table below draws directly from our database of Ofcom Connected Nations 2025 data. All figures are premises-based percentages — the share of residential and business premises that can access each technology, not the share that have subscribed.

Northern Ireland's Lead

Northern Ireland's full-fibre figure is the highest of any UK nation by a substantial margin, driven primarily by Project Stratum — a £165 million publicly funded programme that extended full-fibre to rural and hard-to-reach areas across the province. Stratum launched in 2021 and delivered connections to areas that the commercial market would not have reached on its own. Northern Ireland covers a smaller geographic area than any other UK nation, which made the subsidy go further per premise.

The combination of early public investment, a compact network footprint, and strong operator execution has produced a coverage level that serves as a benchmark for what targeted government intervention can achieve in rural broadband.

Scotland's Rural Challenge

Scotland has the lowest full-fibre coverage among the four nations. This reflects its distinctive geography: large areas of the Highlands, Islands, and Southern Uplands have populations spread across vast distances, making the economics of full-fibre build extremely challenging without substantial subsidy. The R100 (Reaching 100%) programme — Scotland's own publicly funded build initiative — has made progress, but Scotland's geographic scale means the gap with Northern Ireland remains the largest in the UK.

Within Scotland, coverage varies considerably between urban local authorities — where full-fibre often approaches or exceeds the UK average — and remote rural authorities, where coverage can be dramatically lower. The local authority data on PlainBroadband captures this variation in detail.

England and Wales

England and Wales sit close together on full-fibre coverage. England benefits from a greater concentration of urban and suburban areas — particularly the major city regions — where commercial deployment has been most intensive. Wales faces challenges similar to Scotland in its rural areas, including Powys, Ceredigion, and Gwynedd, though the overall Welsh figure is close to England's national average.

Top 5 Local Authorities by Full-Fibre

The five local authorities with the highest full-fibre coverage in the Ofcom 2025 data:

The USO Gap: Premises Still Below 10 Mbit/s

Whilst the headline full-fibre and gigabit figures have improved substantially, a residual population of premises remains below the Universal Service Obligation threshold of 10 Mbit/s. The local authorities with the highest below-USO percentages are overwhelmingly rural — often in Scotland, Wales, and parts of South West England. These are the communities most reliant on the USO mechanism to secure a subsidised connection.

The five local authorities with the largest proportion of below-USO premises:

Policy Context: Project Gigabit

The UK government's Project Gigabit programme, administered by Building Digital UK (BDUK), aims to accelerate full-fibre build in the areas that commercial operators will not reach without subsidy. By 2025, the UK had surpassed the 85% gigabit-capable threshold nationally, but the remaining percentage — concentrated in rural and isolated communities — represents the highest-cost, most technically complex connections to deliver.

Local authorities with the largest below-USO gaps and lowest full-fibre coverage are priority candidates for Project Gigabit contracts. Residents in these areas may be eligible to request connections under the Universal Service Obligation in the interim.

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 and constituency tables. Nation-level figures are premises-weighted aggregates computed from local authority data. No values have been interpolated, projected, or modified. See our full methodology for details on how we process Ofcom's data.