Fibre Broadband Explained

What Is Fibre Broadband?

Fibre broadband uses fibre optic cables to transmit data using light signals rather than electrical signals through copper wires.

Fibre optic cables can carry far more data, at much higher speeds, over longer distances with less signal degradation.

However, not all “fibre broadband” is the same.

In the UK, fibre services are typically divided into:

• FTTC (Fibre to the Cabinet)
• FTTP (Fibre to the Premises), also called Full Fibre

Understanding the difference is critical when comparing packages.

FTTC vs FTTP — What’s the Difference?

FTTC (Fibre to the Cabinet):

• Fibre runs from the exchange to a street cabinet
• Copper phone line runs from cabinet to your home
• Speeds typically up to 35–80 Mbps
• Performance affected by distance from cabinet

FTTP (Full Fibre):

• Fibre runs directly into your property
• No copper section
• Speeds typically 100 Mbps to 1 Gbps (and higher)
• Far more stable and less distance-sensitive

FTTC is still common across the UK. FTTP rollout is accelerating, but availability varies by postcode.

Full fibre is considered future-proof and supports symmetrical speeds (equal upload and download) in some cases.

Why Full Fibre Is More Reliable

Copper broadband (including FTTC) is susceptible to:

• Electrical interference
• Signal degradation over distance
• Water ingress
• Internal wiring quality

Full fibre connections avoid most of these issues.

Benefits of FTTP include:

• More consistent peak-time performance
• Higher upload speeds (important for video calls and cloud backups)
• Lower latency (better for gaming and video conferencing)
• Less impact from weather and environmental factors

For households with multiple devices streaming simultaneously, full fibre often delivers noticeable performance improvements.

Advertised Speeds vs Real Speeds

Broadband is marketed using “average download speeds at peak times.”

Under Ofcom rules, providers must:

• Advertise average peak-time speeds
• Provide a minimum guaranteed speed at sale
• Allow penalty-free exit if speeds remain below guaranteed minimum after repair attempts

Average speed is not the maximum possible speed.

Your guaranteed minimum is the key figure to check.

Speeds can be affected by:

• Network congestion
• Router placement
• WiFi interference
• Device capability
• Internal wiring (for FTTC)

Speed guarantees apply to the line entering your home — not necessarily WiFi performance.

Ofcom

https://www.ofcom.org.uk

Phone: 0300 123 3333

Upload Speeds — The Often Overlooked Metric

Download speed gets most attention, but upload speed matters increasingly.

Upload affects:

• Video calls
• Uploading files
• Cloud backups
• Social media posting
• Gaming performance

FTTC typically offers much lower upload speeds than FTTP.

For example:

• FTTC: 10–20 Mbps upload
• FTTP: 100–900 Mbps upload (depending on package)

Households working remotely may benefit significantly from higher upload capacity.

Installation Process

FTTC installation:

• Usually remote activation
• May require engineer if new line needed
• Uses existing phone socket

FTTP installation:

• Requires new fibre cable to property
• External wall drilling
• Installation of Optical Network Terminal (ONT)
• Router connects to ONT

Installation times vary by provider and property type.

Tenants may require landlord permission for drilling and equipment installation.

Contract Length and Pricing Structure

Most fibre contracts are:

• 12 months
• 18 months
• 24 months

Common pricing structure:

• Discounted introductory rate
• Standard out-of-contract rate after minimum term

Many providers now include annual CPI or RPI-linked price rises mid-contract.

Always check:

• Mid-contract price increase clause
• Exit fees
• Equipment return requirements

Out-of-contract prices can be significantly higher than introductory deals.

Is Fibre Broadband Worth It?

Full fibre may be worthwhile if:

• You stream in 4K regularly
• Multiple users work from home
• You rely on cloud storage
• You game online
• You want long-term reliability

For light browsing and single-user households, FTTC may still be sufficient.

The decision is partly about speed needs and partly about stability.

Switching to Fibre

Ofcom’s One Touch Switch system simplifies broadband switching.

The new provider handles:

• Transfer coordination
• Service activation
• Line takeover

You do not need to contact your existing provider directly in most cases.

Switching is penalty-free if you are out of contract.

Always confirm contract end date before switching.