Best broadband deals UK 2026: full fibre from £19 a month, with vouchers up to £170
Lightning Fibre has the lowest start price, £19 a month for 6 months on 1Gbps or 2.5Gbps in covered East Sussex postcodes. Grain fixes the price for 18 months with a free router. Broadband Genie lists 137 deals with vouchers up to £170. Rise Fibre gives a choice of 24-month, 12-month or 30-day terms. Your Co-op pays £20 to new members.
Up to 1Gbps full fibre; 24-month, 12-month or 30-day plans
£19 a month for 6 months on 1Gbps or 2.5Gbps fibre
Free first month plus £5 to £25 SIM or £20 broadband
Full fibre up to 2Gbps, fixed price, free router
Up to £170 voucher or reward card on fibre deals
Key takeaways
- Lightning Fibre: £19 a month for the first 6 months on 1Gbps or 2.5Gbps, free install, unlimited data, 24-month contract.
- Grain: full fibre from 250Mbps to 2Gbps on 18-month fixed prices, with a free router and standard install.
- Broadband Genie: Vodafone Full Fibre 910 at £26.00 a month with a £170 voucher choice, or EE Full Fibre 900 at £26.99 with a £140 reward card.
- Rise Fibre: full fibre up to 1Gbps on 24-month, 12-month or 30-day contracts, with your real prices after a postcode check.
- Your Co-op Broadband: a free first month plus a £20 broadband reward for new members.
Our pick here: Rise Fibre pays Up to 1Gbps fibre, verified against its own terms.
Full fibre broadband can start under £20 a month, and some providers add a voucher on top. Five UK offers are verified here: what each costs, how long the contract runs, and who can order.
Every one of them starts with the same step, a postcode check. Your address sets the packages and the price, so check yours before you choose.
Lightning Fibre: the lowest start price
Lightning Fibre charges £19 a month for the first 6 months on its 1Gbps or 2.5Gbps package. Install is free, data is unlimited and the contract runs 24 months. It is open to new customers in covered East Sussex postcodes.
Take it if: you live in a covered postcode and want gigabit speed without an install bill.
Grain: fixed prices and a free router
Grain runs full fibre from 250Mbps to 2Gbps. Each package sits on an 18-month fixed-price contract with no in-contract price rises, and the router and standard installation are free. A Price Match Guarantee applies. Grain connects only addresses on its network, so enter your postcode first.
Take it if: you want a price that cannot move for a year and a half.
Broadband Genie: pick a deal, get a voucher
Broadband Genie is a comparison page with 137 deals. Enter your postcode, then choose from fibre deals from Vodafone, EE and Sky. Two examples from the offers page: Vodafone Full Fibre 910 at £26.00 a month with a £170 voucher choice, and EE Full Fibre 900 at £26.99 with a £140 reward card. Deals run on 24-month contracts. Claim your reward from the provider after install.
Take it if: you want the widest choice and a voucher in your pocket.
Rise Fibre: your choice of contract length
Rise Fibre sells full fibre with speeds of up to 1Gbps. Enter your postcode to see the packages and prices at your address, then pick a 24-month, 12-month or 30-day contract.
Take it if: you want the option of a short contract.
Your Co-op: free month and £20
Your Co-op Broadband & Mobile gives new members a free first month and a £20 welcome reward on broadband. Joining as a member is free, and you enter your Membership Number when you order. Broadband prices stay fixed for the whole 24-month contract, and it is sold only where your postcode is covered.
Take it if: you are a Co-op member, or happy to become one.
How to choose a broadband deal
- Coverage first. Run the postcode check on each provider, because only some will reach your door.
- Speed you need. 250Mbps to 1Gbps suits most homes. 2Gbps and 2.5Gbps are for heavy households.
- The real monthly price. Add the intro months to the later months and divide by the term.
- Contract length. Shorter terms keep you flexible. Fixed-price terms protect you from rises.
- Extras. Free install, a free router, a voucher or a free month all cut your first-year cost.
Our verdict
Lightning Fibre for the lowest price where it covers you, Grain for a fixed price, Broadband Genie for a voucher and the most choice, Rise Fibre for a short contract, and Your Co-op for a free month. Check your postcode on three of them in five minutes and take the best offer for your address.
Switching mobile too? See the best SIM only deals, and pair a broadband switch with cashback from our best cashback sites.
Side by side
| Lightning Fibre | Grain | Broadband Genie | Rise Fibre | Your Co-op | |
|---|---|---|---|---|---|
| What you get | £19 a month for 6 months | 250Mbps to 2Gbps, free router | Up to £170 voucher or reward card | Full fibre up to 1Gbps | Free first month + £20 |
| Speeds | 1Gbps or 2.5Gbps | 250Mbps to 2Gbps | Fibre deals from Vodafone, EE and Sky | Up to 1Gbps | Fibre where your postcode is covered |
| Contract | 24 months | 18 months, fixed price | 24 months | 24-month, 12-month or 30-day | 24 months, fixed price |
| Extras | Free install, unlimited data | Free router and standard install, Price Match Guarantee | Voucher or reward card, claimed after install | Prices shown after your postcode check | Free first month |
| Who qualifies | New customers in covered East Sussex postcodes | New customers on Grain's network | UK households passing a postcode check | Addresses Rise Fibre covers | New Co-op members where covered |
| Code or link | Link | Link | Link | Link | Link |
Frequently asked questions
What is the cheapest full fibre broadband in the UK?
Lightning Fibre starts at £19 a month for the first 6 months on its 1Gbps or 2.5Gbps package, with free install and unlimited data on a 24-month contract. It is open to new customers in covered East Sussex postcodes only. Elsewhere, Broadband Genie's offers page lists 137 deals you can sort by your postcode.
How do I know which broadband I can get at my address?
Every offer here starts with a postcode check, and your address sets the packages and prices. Rise Fibre, Grain, Lightning Fibre and Your Co-op sell only where their network reaches, while Broadband Genie compares what is available at your postcode.
What does a fixed-price contract mean?
The monthly price stays the same for the whole term. Grain's packages sit on an 18-month fixed-price contract with no in-contract price rises, and Your Co-op's broadband prices stay fixed for the 24-month contract.
How do I get the voucher or reward card?
Order a deal that shows the voucher through Broadband Genie, then claim the reward from the provider after your line is installed. The offers page shows Vodafone Full Fibre 910 at £26.00 a month with a £170 voucher choice and EE Full Fibre 900 at £26.99 with a £140 reward card.
Is there a broadband deal with no 24-month contract?
Rise Fibre offers a 30-day contract alongside its 12-month and 24-month options, and Grain's contract is 18 months. The shorter the term, the more flexibility you keep, so compare the monthly price across terms at your address.
Do I need to be a Co-op member?
Joining Your Co-op as a member is free, and you enter your Membership Number when you order. New members get a free first month and a welcome reward of £20 on broadband.
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Last checked 23 October 2026 by Bez, Editor-in-Chief. Figures verified against each brand's own terms. How we check.