Full Fibre Business Broadband UK: What It Is and Who Needs It
Most UK businesses think they already have fibre broadband. They don't. What most offices run on is a hybrid connection — fibre from the exchange to a cabinet at the end of the road, then ageing copper cable from the cabinet to the building. It's called FTTC. Real full fibre — FTTP — runs fibre optic cable all the way from the exchange directly to your premises. The difference matters, and with Openreach connecting over 17 million UK premises to full fibre by early 2025, it is increasingly easy to get. Here's what it means for your business.
The short answer: Full fibre business broadband (FTTP — Fibre to the Premises) delivers speeds up to 1Gbps with consistent upload and download performance, because there is no copper in the chain. It replaces both FTTC broadband and, eventually, ADSL services that will go offline with the PSTN switch-off in January 2027. As of mid-2025, it is available to 85.9% of UK premises and is the recommended internet connection for businesses running VoIP.
What "full fibre" actually means
The UK broadband market has three main technologies in use for businesses right now:
ADSL and ADSL2+ The oldest technology. Copper from the exchange all the way to your premises. Slow, asymmetric (download much faster than upload), and being switched off with the PSTN in January 2027. If you are still on ADSL, migration is not optional — it is a deadline.
FTTC — Fibre to the Cabinet The most common "fibre" broadband in UK offices. Openreach runs a fibre cable from the telephone exchange to a green cabinet on the street, then copper from that cabinet to your building. The fibre portion is fast; the copper portion limits you. Maximum download speeds are typically 40–80Mbps for most business premises, with upload speeds of 10–20Mbps. Performance degrades with distance from the cabinet.
FTTP — Fibre to the Premises (full fibre) Pure fibre optic cable from the exchange directly to your building. No copper in the chain means no copper-related speed limits or degradation. Speeds up to 1Gbps symmetrical (equal upload and download). Performance does not vary with distance from the cabinet. This is full fibre broadband.
The distinction is practical, not just technical. If your team runs cloud applications, makes VoIP calls, handles large file transfers, or has remote workers connecting into on-site systems, the consistent upload speed and lower latency of FTTP makes a measurable difference to day-to-day performance.
How fast is UK full fibre rollout?
Fast — and accelerating. According to Ofcom's Connected Nations data:
- 85.9% of UK premises had access to gigabit-capable broadband as of July 2025, up from 84% in 2024
- Openreach had connected over 17 million premises to FTTP by early 2025, with a target of 25 million by December 2026
- Ofcom projects 91% full-fibre availability across the UK by May 2026
- The UK is on track to reach 96% fibre coverage by 2027, according to Broadband Breakfast analysis
This means that for most UK businesses — certainly those in towns, cities, and suburban commercial areas — full fibre is either already available or will be within the next twelve months.
Rural businesses remain the exception. Coverage in rural areas lags significantly behind urban figures. Government-backed Project Gigabit contracts are extending coverage, but if your premises are in a rural location, your options may still be limited to FTTC, ADSL, or a dedicated leased line.
FTTC vs FTTP: the business case
You might be thinking: my FTTC broadband works fine, so why switch to FTTP?
Three reasons make it worth upgrading when full fibre is available.
1. Upload speed matters more than you think FTTC typically delivers 10–20Mbps upload. FTTP delivers up to 1Gbps symmetrical — the same speed in both directions. For a team making VoIP calls, using Microsoft Teams or Zoom, working with cloud storage (SharePoint, Dropbox, Google Drive), or backing up data remotely, upload speed is the bottleneck on FTTC. On FTTP, it disappears.
2. VoIP call quality is more consistent VoIP quality depends on low latency and low jitter — not just raw speed. Full fibre connections deliver more consistent performance because there is no copper segment that degrades during peak usage. Businesses that run FTTC with VoIP often notice call quality issues during busy periods; businesses on FTTP typically do not.
3. ADSL is going offline in January 2027 If your broadband is ADSL, upgrading is not optional — ADSL runs on the copper PSTN and will be switched off with it. Upgrading now to FTTP means you complete the move on your schedule, rather than scrambling before a forced deadline.
Full fibre broadband speeds for business: what to expect
| Technology | Max download | Typical upload | Latency | Notes |
|---|---|---|---|---|
| ADSL2+ | 24Mbps | 2Mbps | 20–30ms | Being switched off Jan 2027 |
| FTTC (superfast fibre) | 80Mbps | 20Mbps | 8–12ms | Most common UK office broadband |
| FTTP 150Mbps | 150Mbps | 150Mbps | 3–5ms | Good for up to ~15 staff |
| FTTP 500Mbps | 500Mbps | 500Mbps | 3–5ms | Good for 15–40 staff |
| FTTP 1Gbps | 1Gbps | 1Gbps | 3–5ms | Large offices or high call volumes |
| Leased line 100Mbps | 100Mbps | 100Mbps | 3–5ms | Dedicated, SLA-backed |
For a team of 10–15 running VoIP, cloud apps, and video calls, the FTTP 150Mbps or 500Mbps tier covers everyday use comfortably. The 1Gbps tier makes sense for larger teams or businesses handling significant data transfers.
What does full fibre business broadband cost?
Business-grade FTTP products are priced separately from residential full fibre. The key differences are the SLA (business broadband includes faster fault repair commitments), static IP address support, and priority support channels.
Typical UK pricing for business FTTP in 2025:
| Speed | Monthly cost | Best for |
|---|---|---|
| Up to 150Mbps | £30–£60/month | Small offices, up to 10 staff |
| Up to 500Mbps | £50–£90/month | Mid-size offices, 10–25 staff |
| Up to 1Gbps | £80–£150/month | Larger offices, VoIP-heavy businesses |
These are business broadband products — shared infrastructure, but with better SLAs than residential. For businesses where guaranteed uptime is non-negotiable, a dedicated leased line (from £149/month with VoIPninjas) provides contractually guaranteed bandwidth and a 4–5 hour fault repair SLA.
Full fibre broadband and VoIP: why they belong together
VoIP over full fibre is the future-proof business communications stack for UK SMEs. Here is why the combination makes sense.
The 2027 PSTN switch-off forces every UK business off ADSL broadband — both the phone lines and the ADSL internet connection that shares the copper network. Businesses currently on ADSL need to upgrade their broadband as part of the PSTN migration, not separately.
FTTP is the natural upgrade target. It replaces the copper connection entirely, delivers speeds that comfortably support VoIP (each active call uses approximately 100Kbps — a tiny fraction of even a 150Mbps FTTP connection), and provides the low-latency, consistent performance that VoIP call quality depends on.
For a 10-person business migrating from PSTN to VoIP:
- Replace ADSL with FTTP 150Mbps: approximately £40/month
- VoIPninjas Samurai hosted VoIP: £14.99/user/month = £149.90/month for 10 users
- Total: approximately £190/month for complete business communications
Compare that to ISDN lines at £30–£50/channel plus ADSL broadband at £30–£50/month. Most businesses moving this combination see an immediate monthly saving.
Is full fibre available at your business premises?
With 85.9% of UK premises covered, the answer is probably yes. The easiest way to confirm is to check your postcode against Openreach's or your prospective provider's availability checker.
If full fibre is not yet available at your address, FTTC is the next best option while you wait. If FTTC is also unavailable — which is most common in rural locations — the options are fixed wireless access, 4G/5G broadband, or a leased line for businesses where connectivity is business-critical.
How VoIPninjas approaches connectivity
VoIPninjas is a direct UK provider — not a reseller — based in Christchurch on the South Coast. We supply both business broadband (including FTTP) and hosted VoIP plans, which means we handle connectivity and phone system from a single point of contact.
For businesses migrating from PSTN:
- We audit your current broadband and phone setup in a free consultation
- We advise on the right connectivity tier for your team size and call volumes
- We handle number porting, VoIP configuration, and broadband switching concurrently — one migration, not two separate projects
- Our leased lines start from £149/month for businesses needing guaranteed uptime rather than best-effort broadband
Our hosted VoIP starts at £5.99/user/month on a 28-day rolling agreement. The free 14-day trial lets you test call quality on your existing connection before committing to any changes.
Check availability and get a quote No tie-in, no setup fees. Most businesses are fully live within 10 working days. Get a Free Quote — or call us: 0330 043 2388
Frequently asked questions
What is the difference between FTTP and FTTC broadband?
FTTC (Fibre to the Cabinet) runs fibre from the exchange to a street cabinet, then copper cable from the cabinet to your building. Speeds are limited by the copper segment — typically 40–80Mbps download, 10–20Mbps upload. FTTP (Fibre to the Premises) replaces the copper segment with fibre all the way to your building, delivering speeds up to 1Gbps with equal upload and download performance.
Do I need full fibre broadband to use VoIP?
No — VoIP works on FTTC broadband for most businesses. The minimum requirement for good VoIP call quality is a stable connection with at least 10Mbps download and upload. Full fibre delivers better performance and lower latency, which improves call consistency, but it is not a hard requirement. Our free 14-day trial lets you test VoIP on your existing connection before making any connectivity changes.
Will my FTTC broadband be affected by the PSTN switch-off?
No — FTTC broadband will not be affected by the PSTN switch-off. FTTC uses fibre to the cabinet and copper from the cabinet to your building, but the copper segment is separate from the PSTN switching infrastructure. ADSL broadband is the product that runs directly on the PSTN copper network and will be affected. If you are unsure which type of broadband you have, check your router model or ask your current provider.
Is business full fibre broadband different from residential FTTP?
Yes — business-grade FTTP includes faster fault response SLAs, static IP address support, and dedicated business support channels. The underlying fibre infrastructure is the same, but the service terms are different. Business FTTP costs more than residential because of those service guarantees. For businesses where downtime costs money, the SLA difference justifies the price gap.
How long does it take to install full fibre broadband at a business premises?
Installation typically takes 2–4 weeks from order to go-live for most urban and suburban premises. Rural or complex installations may take longer. An Openreach engineer installs the fibre termination point at your premises and connects it to the existing network infrastructure. The process is straightforward for most commercial buildings.