The UK’s 17 largest full fibre broadband networks – Autumn 2025
Independent analysis from ThinkBroadband (TBB) has just been released, giving an up-to-date look at the country’s biggest Fibre-to-the-Premises (FTTP) networks. The data shows how many homes and businesses are genuinely “Ready for Service” (RFS) – meaning customers can actually order broadband – compared with the official claims made by providers.
As of September 2025, around 80% of UK premises can now access full fibre, rising to almost 89% for gigabit-capable broadband (a mix of FTTP and Virgin Media’s cable network).
Why this matters
Broadband providers often make bold announcements about their rollout progress, but not every “premises passed” claim means customers can place an order straight away. Sometimes a network is technically built but not yet live, or there may be errors in reporting. That’s why independent checks like TBB’s are so useful for getting a real-world picture.
Top 17 full fibre networks by size (September 2025)
- Openreach (BT) – 19.2m premises live (official claim: 20m).
- CityFibre – 4.3m live (official claim: 4.3m as of June 2025).
- Netomnia (YouFibre) + Brsk – 2.6m live (official claim: 2.8m).
- nexfibre (Virgin Media) – 1.8m live (official claim: 2.3m).
- Virgin Media (RFOG FTTP) – 1.7m live (official figures unclear due to upgrades).
- Community Fibre – 1.5m live (official claim: 1.5m).
- Hyperoptic – 1.3m live (official claim: 1.9m).
- Gigaclear – 624k live (official claim: 600k).
- FullFibre Ltd + Zzoomm – 602k live (official claim: 600k).
- Trooli – 444k live (official claim: 423k).
- Fibrus – 426k live (official claim: 440k).
- AllPoints Fibre – 299k live (no official claim published).
- F&W Networks – 294k live (official claim: 410k, but dated Feb 2024).
- KCOM – 288k live (official claim: 305k).
- Toob – 257k live (official claim: 150k, dated Aug 2023).
- G.Network – 255k live (official claim: 361k, dated Mar 2024).
- Grain (Grain Connect) – 244k live (official claim: 270k).
What stands out?
- Openreach remains the UK’s largest fibre builder, nearing 20 million homes.
- CityFibre has cemented its position as the UK’s second biggest full fibre network.
- nexfibre, the new Virgin Media-backed network, is growing quickly.
- Hyperoptic, G.Network and F&W Networks show the biggest gaps between official claims and independently verified coverage.
- Toob has grown significantly since its last official update.
The bottom line for customers
UK full fibre coverage has never been higher, but the figures can be confusing. Just because a provider says your home is covered doesn’t always mean you can place an order right away.
Check your postcode on our comparison tool to see which networks are truly live in your area before making the switch.
