BT offers Full Fibre broadband on a choice of Full Fibre 100, Full Fibre 500 and Full Fibre 900 plans. Compare the plans and speeds available.

In the UK, BT now offers full fibre broadband with download speeds of up to 910Mbps. Making use of a fibre optic connection all the way into your home, you can get download speeds that are about 15 times faster than normal fibre broadband. You’ll also get more reliable broadband as it won’t rely on a copper phone line into your home.

At present, you can choose from three Full Fibre broadband plans on BT: Full Fibre 100, Full Fibre 500 and Full Fibre 900.

In this article, we’ll review and compare BT’s Full Fibre broadband plans including the speeds available and what you can do on each one. We’ll also look at BT’s full fibre broadband hub and at the current availability of the service.

See BT Full Fibre Offers →

Prices From: £34.99 per month
Best Offer: Various reward card offers available
(check on the BT website)
Contract Length: 24 months
Download Speed: 150Mbps (Full Fibre 100)
500Mbps (Full Fibre 500)
910Mbps (Full Fibre 900)
Upload Speed: 30Mbps (Full Fibre 100)
73Mbps (Full Fibre 500)
110Mbps (Full Fibre 900)
Router: Smart Hub 2
Coverage: 5 million+ homes
(check your postcode)

What is Full Fibre Broadband?

In the UK, what we traditionally know a “fibre broadband” connection should more accurately be described as fibre-to-the-cabinet (FTTC).

With fibre-to-the-cabinet broadband, a fibre optic cable runs from the telephone exchange to a street cabinet near your home. The final section (or the “last mile”) between the cabinet and your home uses an old copper phone line. Because of this, download speeds will rarely go above 67Mbps (with an absolute maximum of 80Mbps if you live very close to the cabinet).

In contrast, full fibre broadband uses a fibre optic cable for the entire distance between the telephone exchange and your home. Because of this, you can get even faster download speeds: up to 1,000Mbps with the possibility of even faster speeds in the future. It’s also a more reliable technology as it doesn’t rely on old analogue components.

As of 2021, BT offers full fibre broadband to around 5 million households. This is approximately 18% of all UK homes (you can check the availability at your address here). The current ambition is for this to increase to 25 million homes by the end of 2026.

BT Full Fibre Plans

If you’re living at an address with access to BT’s full fibre broadband, you’ll currently have a choice of three full fibre plans: Full Fibre 100 (with an average download speed of 150Mbps), Full Fibre 500 (with an average download speed of 500Mbps) and Full Fibre 900 (with an average download speed of 910Mbps).

The following table shows a side-by-side comparison of the three plans:

Full Fibre 100 Full Fibre 500 Full Fibre 900
Monthly Price: £34.99 per month £44.99 per month £55.99 per month
Best Offer: Check BT website Check BT website -
Download Speed (average): 150Mbps 500Mbps 910Mbps
Upload Speed (average): 30Mbps 73Mbps 110Mbps
Inclusive Features
Phone Line: Optional (using Digital Voice) Optional (using Digital Voice) Optional (using Digital Voice)
BT Virus Protect: 15 devices 15 devices 15 devices
BT Cloud: 1,000GB cloud storage 1,000GB cloud storage 1,000GB cloud storage
Stay Fast Guarantee: 100Mbps 150Mbps 455Mbps
Technology
Technology: Full Fibre
(Fibre 100 also available on Gfast)
Full Fibre
(Fibre 250 also available on Gfast)
Full Fibre
(not available on Gfast)
Router: Smart Hub 2 Smart Hub 2 Smart Hub 2
Availability: 5 million UK homes
Check availability →
5 million UK homes
Check availability →
5 million UK homes
Check availability →

In addition to the above, you can also order BT’s regular fibre broadband plans (Fibre Essential, Fibre 1 and Fibre 2). These plans will normally be provided using fibre-to-the-cabinet (FTTC) technology unless you’re living in a home where only a full fibre broadband connection is available.

If you’re living in a home with access to an Openreach G.fast connection, you’ll have access to the Fibre 100 and Fibre 250 broadband plans from BT.

Full Fibre 100

At present, BT’s Full Fibre 100 is their most popular broadband plan using full fibre technology. It offers an average download speed of 150Mbps with a minimum ‘Stay Fast’ guaranteed download speed of 100Mbps. You’ll also get an average upload speed of 30Mbps.

The Full Fibre 100 plan should be sufficient for most UK households. It’s more than twice the speed of BT’s Fibre 2 plan which is the fastest you’re able to get on traditional fibre broadband connections. For instance, Full Fibre 100 will allow you to stream ultra-HD video on six devices at the same time. You can also download a full HD-quality film in only four minutes.

At present, you can get BT’s Full Fibre 100 broadband for £34.99 per month:

ServiceAverage SpeedContract LengthUpfront PriceMonthly Price
BT
Full Fibre 100
150Mbps download24 month contract£0£34.99/month

See all BT Full Fibre 100 deals →

The Full Fibre 100 plan comes with BT’s Smart Hub 2 router. If you like, you can add a home phone service to it using BT’s Digital Voice technology. There’s also the Complete Wi-Fi add-on for a guaranteed wi-fi signal in every room of your home and the Hybrid Connect add-on for a 4G-based backup for your fibre broadband service.

Customers choosing the BT Full Fibre 100 plan will receive BT’s Virus Protect software to use on up to 15 devices. You’ll also get 1,000GB of BT Cloud storage which will allow you to backup your files and photos online.

Full Fibre 500

If you’re looking for a mid-range full fibre broadband service, you can choose BT’s Full Fibre 500. This offers an average download speed of 500Mbps with a minimum ‘Stay Fast’ guaranteed download speed of 250Mbps. It also has an average upload speed of 73Mbps.

If you choose the Full Fibre 500 plan, your downloads will be more than three times faster than on Full Fibre 100. For instance, you’ll be able to stream 4K (ultra-HD) content on 20 devices at the same time. Alternatively, you can download a full HD-quality movie in around one minute.

It costs £44.99 per month to get Full Fibre 500:

ServiceAverage SpeedContract LengthUpfront PriceMonthly Price
BT
Full Fibre 500
500Mbps download24 month contract£0£44.99/month

See all BT Full Fibre 500 deals →

As with the Full Fibre 100 plan, you’ll get BT’s Smart Hub 2 router included. There’s also an optional home phone service that uses Digital Voice technology. A range of add-ons are available for Full Fibre 500 including Complete Wi-Fi, BT TV and Hybrid Connect.

Full Fibre 900

If you’re looking for the fastest available broadband service, you can get BT’s Full Fibre 900 broadband which has an average download speed of 910Mbps. The minimum guaranteed ‘Stay Fast’ download speed is 455Mbps and the average upload speed is 110Mbps.

If you’re using Full Fibre 900, you’ll get download speeds that are around six times faster than on Full Fibre 100. This means you can download a full HD-quality movie in around 36 seconds. You can also comfortably stream 4K-quality content on 36 devices at the same time, meaning it will easily handle demand from the busiest household.

You can get BT’s Full Fibre 900 plan for £55.99 per month:

ServiceAverage SpeedContract LengthUpfront PriceMonthly Price
BT
Full Fibre 900
910Mbps download24 month contract£0£55.99/month

See all BT Full Fibre 900 deals →

On the Full Fibre 900 plan, it’s possible to get gigabit download speeds (up to 1,000Mbps). However, BT has marketed it as a 900Mbps plan as most home network setups will not allow you to benefit from the full speeds. For instance, you’ll normally need to use a Gigabit Ethernet cable to have your device plugged in directly to the Smart Hub to access the fastest available speeds.

On BT’s Full Fibre 900 plan, you’ll get a Smart Hub 2 router. You can add an optional home phone service which will be provided using Digital Voice technology. You can also add a whole home mesh wi-fi system with BT’s Complete Wi-Fi or a 4G-based broadband backup with BT’s Hybrid Connect. A range of flexible BT TV packages can also be added to this plan.

Other Broadband Plans

As well as BT’s full fibre broadband plans, it’s also possible to choose a regular fibre broadband plan (Fibre Essential, Fibre 1 or Fibre 2). Compared to the full fibre plans that start from £34.99 per month, you can get normal fibre broadband from only £24.99 per month.

ServiceAverage SpeedContract LengthUpfront PriceMonthly Price
BT
Fibre Essential
36Mbps download24 month contract£0£24.99/month
BT
Fibre 1
50Mbps download24 month contract£0£26.99/month
with £50 reward card
BT
Fibre 2
67Mbps download24 month contract£0£29.99/month
with £90 reward card

See all BT fibre broadband deals →

If you’re living at an address where only a full fibre (FTTP) broadband connection is available (e.g. in some new build homes and areas where copper phone lines have been removed), you’ll still be able to get BT’s regular fibre plans. They won’t be branded as “full fibre” but the underlying service will still be provided using full fibre technology.

If you choose a regular fibre broadband plan on a full fibre connection, you won’t benefit from the faster speeds available (it’ll be limited to normal fibre speeds). You will, however, continue to benefit from the improved reliability of having a full fibre connection. You should also get a more consistent service compared to other customers who are using regular fibre broadband connections.

In the past, BT also offered a Full Fibre 300 plan. This plan is no longer available to new customers – it has been replaced by the Full Fibre 500 plan which is now available for the same price.

BT Full Fibre Speeds

If you’re using BT’s full fibre broadband service, you’ll have an average download speed of between 150Mbps and 910Mbps, depending on your plan.

The following table shows the average download speeds and upload speeds you can expect on each of BT’s full fibre broadband plans:

BT Broadband Plan Download Speed Upload Speed
Full Fibre 100 150Mbps
(100Mbps guaranteed)
30Mbps
(10Mbps guaranteed)
Full Fibre 300 300Mbps
(150Mbps guaranteed)
49Mbps
(10Mbps guaranteed)
Full Fibre 500 500Mbps
(250Mbps guaranteed)
73Mbps
(10Mbps guaranteed)
Full Fibre 900 910Mbps
(455Mbps guaranteed)
110Mbps
(10Mbps guaranteed)

† BT’s Full Fibre 300 plan is no longer offered to new customers.

On all of BT’s full fibre broadband plans, you’ll benefit from the Stay Fast Guarantee for Full Fibre. This says your broadband connection should never be slower than the minimum guaranteed speeds. If either the download speed or upload speed to your hub fall below the guaranteed minimum, you’ll be able to claim a £20 gift card as compensation from BT (up to four times per year). In some cases, you may also be able to cancel your contract without penalty.

It’s worth emphasising that the Stay Fast Guarantee applies to the speed as measured at your hub and not on individual devices. In practice, things like having a poor Wi-Fi signal can lead to slower speeds on your devices. You’ll need to add BT’s Complete Wi-Fi service to benefit from a guaranteed speed in every room (you’ll get a minimum of 10Mbps in every room of your home with BT’s Complete Wi-Fi Guarantee).

BT Full Fibre Hub

When you sign up for BT’s full fibre broadband service, you’ll receive a Smart Hub 2 router to use with the service. This will produce a Wi-Fi network through your home for other devices to connect to. You’ll also get 4 Gigabit Ethernet sockets for connecting wired devices to your home network and DECT connectivity for connecting a cordless home phone.

The following table shows the technical specifications of BT’s Smart Hub 2 router:

BT Smart Hub 2
Availability
BT Broadband Plans: Full Fibre 100
Full Fibre 300
Full Fibre 500
Full Fibre 900
Connectivity
Dual-Band Wi-Fi: Yes
Wi-Fi Connectivity: 802.11a/b/g/n/ac
Wi-Fi Speed: Up to 2022Mbps total
2.4GHz Wi-Fi: 3×3 MIMO (up to 289Mbps)
5GHz Wi-Fi: 4×4 MIMO (up to 1733Mbps)
Mesh Wi-Fi: Yes (requires BT Complete Wi-Fi)
Ethernet: 4 Gigabit Ethernet ports
Phone: 1 FXS phone port (Digital Voice)
2 DECT antennas
USB ports: 1 USB 2.0 port
Other: WPA2 / WPA security
Built-in firewall
Automatic channel selection & optimisation
Other
Colour: Black
More Information: BT Website

In addition to the Smart Hub 2 router, you’ll need an Openreach modem (ONT) inside your property. If you don’t currently have an Openreach modem, one will be installed in your home as part of the setup process for Full Fibre.

Coverage & Availability

BT’s full fibre broadband makes use of FTTP (fibre-to-the-premises) connectivity through the Openreach network.

As of 2021, BT offers full fibre broadband to around 5 million UK homes. This equates to about 18% of all UK households. The current ambition is for this to increase to 25 million homes by December 2026.

To see whether BT’s full fibre broadband is available where you live, you can use the availability checker on their website. This will show you whether the full fibre plans are available where you live.

Check BT Full Fibre Broadband Availability →

Frequently Asked Questions

What is BT Full Fibre 100?
At present, BT’s Full Fibre 100 is their most popular broadband plan using full fibre technology. It offers an average download speed of 150Mbps (more than double the average speed on BT’s Fibre 2 plan). You’ll also get average upload speeds of 30Mbps and a more reliable service that doesn’t depend on an old copper connection. See BT’s Full Fibre 100 broadband deals.
How does Full Fibre 100 compare to Full Fibre 500 and Full Fibre 900?
If you choose the Full Fibre 500 or Full Fibre 900 plans, you’ll benefit from a faster download speed and upload speed as follows:
  • Full Fibre 100: 150Mbps download, 30Mbps upload
  • Full Fibre 500: 500Mbps download, 73Mbps upload
  • Full Fibre 900: 900Mbps download, 110Mbps upload

You can compare the three different plans here.

How does BT’s Full Fibre broadband service work?
With normal fibre broadband services, the fibre optic connection only goes to a cabinet near your home. The ‘last mile’ between the cabinet and your home uses an old copper phone line so is subject to degradation.

With full fibre broadband, the fibre optic connection goes all the way into your home. This means you’re able to get much faster speeds along with a more reliable broadband connection.

How do I check the availability of BT’s full fibre broadband where I live?
At present, BT’s full fibre broadband is available in around 5 million UK homes. You can check for availability at your address by entering your postcode on their website.

BT is aiming to roll out full fibre broadband to 25 million homes by December 2026.

More Information

For more information about BT’s full fibre (FTTP) broadband service, please see the official BT website.

You may also find it useful to read our BT Broadband review and our guide to full fibre broadband services in the UK.

Your Comments 26 so far

We'd love to hear your thoughts and any questions you may have. So far, we've received 26 comments from readers. You can add your own comment here.

  • Ken,

    thank you for your informative article.

    I was reading this as Open Reach are presently turning my street into a chaotic building site to install FTTP conduit, and I was wondering if it is worth going to full fibre – after the dust settles? In my use case, the answer is a resounding… no.

    Why? Our local VDSL FTTC speeds are 80Mbps (60/20), which is a dream speed for many people. The green box is just meters away. Full HD content streams with little or no dropped packets. So unless I want holes in my driveway, with more diggers, more tarmac, more dust, and spend a lot more money, it’s just not worth it.

    If I want speed, I’ll await the arrival of 5G and buy a window antenna. But then I have neighbours who think 60Mbps is SLOW and they need more speed, because the “internet is getting faster” and they need to keep up.

    As for download speeds, I wish BT would educate the public that those speeds are to the hub (WAN side). Their device speeds (LAN side) are their problem. Faster internet will NEVER make a slow device run faster, even if ‘broadband experts’ tell you it does.

    AJay

  • Ray Proudfoot said:

    Hi Ken. Useful article, thank you. I switched to the 900 package two weeks ago and whilst I can download at 900Mbps on a Ethernet connected PC the download speed on a 6 year-old iPad is only 88.5Mbps. But the upload speed on the iPad is 106Mbps.

    The iPad is via Wi-fi of course but the SmartHub 2 is in a bedroom right above me plus there’s a BT Disk in the lounge 3 metres away from my position. Signal strength is excellent.

    On my previous BT package – FTTC – download speeds via Ethernet and Wi-fi were very close around 50Mbps. I’m struggling to understand why my download speeds via Wi-fi appear to be throttled compared to uploads. I’m the only user in the house.

    Running the same test on a 2 year-old Android smartphone gives me 140/110. It seems very dependent on kit. Hope you can throw some light on things.

  • Jeff Griffin said:

    Hi Ken,

    We were upgraded to BT Full Fibre 900 with BT Halo 3 last week (sold as 900DL / 110UL) and now have dramatically better internet service now. I’ve able to get over 800Mbps download speeds but it is clear that BT or Openreach are capping the available upload speeds to 50Mbps and expressly not delivering on their marketing promise of 110Mbps.

    I’ve raised the issue with BT and because we are above their minimum upload of 10Mbps, they don’t seem to think there’s any issue and they won’t take any steps to remedy the promised UL speed.

    Do you have any advice to remedy this? Full disclosure, I am an American ex-pat and don’t yet have a solid grasp of how these things work here in the UK and how to resolve after getting the run around from BT for over 2 hours. Any advice would be much appreciated.

    Best regards,
    Jeff

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