BT fibre optic broadband offers speeds ranging from 30Mbps on standard FTTC connections up to 1Gbps on full fibre (FTTP) connections, with some areas capable of even higher gigabit speeds.

FTTC (Fibre to the Cabinet)

BT's standard fibre service, known as FTTC, delivers fibre to a street cabinet and uses copper wiring for the final connection to your home. Typical download speeds for FTTC range from 30Mbps to 76Mbps, depending on the package and distance from the cabinet, with upload speeds between 2Mbps and 20Mbps . The actual speed can vary due to line length and network congestion.

FTTP (Full Fibre)

BT's full fibre service, also called FTTP, runs fibre directly into your home, bypassing copper lines. This allows for much higher speeds, with download speeds up to 1Gbps (1000Mbps) and upload speeds up to 330Mbps, with future upgrades expected to reach 1Gbps symmetrical . FTTP is increasingly available across the UK, with nearly three-quarters of premises having access as of early 2025 .

Availability and Performance

• Superfast FTTC is available to 97% of UK homes, providing sufficient speeds for most households .
• Full fibre (FTTP) is available to around 73% of UK premises, with higher coverage in urban areas and Northern Ireland reaching over 96% .
• BT guarantees the speeds they advertise with their Stay Fast Guarantee, offering compensation if speeds are not met .

Comparison to Other UK Broadband

While BT's FTTC is typical for superfast broadband, full fibre services from BT and other providers can reach gigabit speeds, with some networks offering up to 5Gbps in select locations . BT's FTTP is competitive with other major providers like Virgin Media, Sky, and Vodafone, which also offer gigabit-capable broadband. In summary, BT fibre optic internet ranges from 30Mbps on standard FTTC to 1Gbps on full fibre FTTP, with availability and performance improving as full fibre networks expand across the UK .