CityFibre has reported a strong quarter of growth on its wholesale full fibre network. The company says its fibre-to-the-premises footprint now reaches around 4.6 million UK homes and businesses, with roughly 730,000 live broadband customers. Net additions hit 108,000 in Q3 2025, more than double the previous quarter, as major providers accelerated sales on the platform.
Sky’s arrival gives CityFibre a lift
A key driver this quarter is Sky Broadband launching over CityFibre in a growing number of locations, including multi-gig packages up to 5Gbps. With Sky now joining Vodafone, TalkTalk and Zen Internet on the network, more households can pick a familiar brand while still connecting over CityFibre’s fibre lines. That broader retail choice appears to be translating into faster take-up.
Quarterly trading points to improving profitability
CityFibre reported Q3 2025 revenue of £43m, up from £34m a year earlier. Adjusted EBITDA reached £7.6m for the quarter, up sharply year on year, putting the business on an annualised revenue run-rate of about £172m and an EBITDA run-rate of roughly £30m. The figures suggest the wholesale model is gaining operating scale as partners sell higher volumes.
Full-year 2024 accounts: revenue up, losses narrow, investment continues
The group’s statutory accounts to 31 December 2024 show revenue rising to about £134m from £100m in 2023. The operating loss narrowed to about £176.6m from £213.8m, while adjusted EBITDA swung to a small profit of around £6m after a loss the prior year. Finance income and finance costs reflected the capital-intensive build: total finance income was roughly £95m against finance costs of about £279m, leaving a statutory loss before tax of around £360m. The balance sheet shows total assets near £4.75bn and liabilities around £4.22bn. Average headcount over the year was 1,594, down from 1,876 as the business focused on execution.
Funding runway, acquisitions and government contracts
Earlier this year CityFibre secured a multi-billion financing package of around £2.3bn. The company plans to use the funding to extend coverage, acquire regional fibre networks where it makes sense, and deliver a pipeline of government-backed Project Gigabit contracts worth roughly £860m in subsidies. Those contracts target harder-to-reach communities, complementing the firm’s city builds.
What is CityFibre?
CityFibre is the UK’s largest independent full fibre network builder and wholesaler. It lays and operates fibre lines but does not sell directly to consumers. Instead, broadband providers use its network to offer packages to households and businesses. The company is backed by long-term infrastructure investors including Antin Infrastructure Partners, Goldman Sachs, Mubadala Investment Company and Interogo Holding.
Which providers use CityFibre?
Availability varies by town, but the national brands on the platform include Vodafone, TalkTalk, Zen Internet and Sky Broadband. A number of regional ISPs also offer services in specific areas. Customers sign up with these providers, who then deliver service over CityFibre’s fibre lines.
Coverage and customer take-up
The network now passes around 4.6 million premises across the UK. Active customers reached about 730,000 at the end of Q3 2025. Net adds of 108,000 in the quarter marked a record for the company and reflect stronger sales pipelines at partner ISPs, more live exchanges, and the addition of multi-gigabit products in launch cities.
Network technology and speeds
CityFibre is rolling out XGS-PON, enabling multi-gigabit download and upload capability. Retail packages available through partner ISPs range from standard full fibre tiers to premium plans up to 5Gbps in selected areas today, with a path to 10Gbps over time. The focus is on reliable performance at peak times, low latency and headroom for households with many connected devices.
Why this matters for UK households
For consumers, CityFibre’s progress means more real choice alongside Openreach-based providers and Virgin Media. Where the network is available, households may see competitive pricing on 150–900Mbps tiers, plus access to multi-gigabit plans. Because retail options differ by location, the simplest next step is to check your postcode with your preferred ISP and see if CityFibre-based packages are offered at your address.
Long-term target and near-term priorities
CityFibre’s long-stated ambition is to reach up to eight million premises. The original end-2025 timeline will not be met, but the mix of fresh financing, potential acquisitions and Project Gigabit builds sets up continued expansion. Near-term priorities are clear: convert more of the existing 4.6 million-home footprint into paying customers, bring Sky live in additional towns, keep rolling out XGS-PON, and use selective deals to fill gaps in the map.
Key numbers at a glance
• Premises passed: about 4.6 million
• Live customers: about 730,000
• Q3 2025 net adds: 108,000
• Q3 2025 revenue: £43m; adjusted EBITDA: £7.6m
• FY2024 revenue: £134m; operating loss: £176.6m; adjusted EBITDA: £6m
• Finance income/costs FY2024: £95m / £279m; statutory loss before tax: £360m
• Total assets: £4.75bn; total liabilities: £4.22bn; average employees: 1,594
Outlook
Momentum looks positive as more big-name ISPs push full fibre packages over CityFibre and as multi-gigabit tiers widen. The company still faces sector-wide pressures, including higher interest costs and build inflation, but the wholesale engine is beginning to show operating leverage. If connection growth holds at current levels and Sky’s rollout continues, CityFibre should exit 2025 with a larger customer base, broader coverage and a clearer route to sustained EBITDA growth.
