Last updated: Tuesday 6 October 2026 (Europe/London).
Status: Community Fibre’s 10% new-customer flash (shop copy last day 16.09.2026) has passed and is no longer open for new joiners — the flash pounds below are historical context. Re-check communityfibre.co.uk for today’s cards, and compare the live Full Fibre alternatives below.
Next update: when communityfibre.co.uk reprints flash end dates, mid-contract £ rises, or London coverage maps.
By: Switch Editorial Team, Switch Squid Ltd
September flash context (join window has passed): Community Fibre’s London shop ran a 10% new-customer flash to 16 September 2026 23:59 UK — Full Fibre from £11.25/mo on 35 Mbps (£135 over 12 months of that flash monthly) and 1 Gbps from £22.50/mo (£270 Year-1 monthly cash), with router included and no set-up fee on Community Fibre’s cheap broadband deals page when we checked on 15–16 September 2026. Same shop stated £3/mo every April from April 2027 and £4 more at end of contract versus the last in-contract month. New customers only — always re-check the postcode checker and checkout before you celebrate a headline.
We compare Community Fibre London deals using Community Fibre’s own prices, not comparison-site exclusives. There are no links to Community Fibre’s own site on this page, so the deal buttons below are full fibre alternatives from BT and Virgin Media. Community Fibre pounds in the table are own-shop figures from the September flash.
SwitchSquid may earn a commission if you buy through some links on this page. It doesn’t change what we show or the price you pay.
BT Full Fibre 150: £23.99/mo · 24 months
- Full Fibre 150 on BT’s offer page when we checked on 24 October 2026; BT lists faster speeds on the same page
- £23.99 a month on a 24-month contract, £0 activation
- Rising to £27.99 from March 2027 and £31.99 from March 2028
What Community Fibre actually is
Community Fibre is a full-fibre altnet concentrated on London and the South East — not Openreach FTTP in a BT-style wrapper, and not Virgin Media coax. Shop copy leans hard on symmetric-ish full fibre, no line rental as a separate copper tax, and free installation on the plans we checked. Its network is mainly in London, so it suits London postcodes and usually not Manchester ones.
September flash table (historical) — own shop 15 September 2026
Plan | Flash £/mo | Was £ | Year-1 monthly cash | Notes |
|---|---|---|---|---|
35 Mbps Full Fibre | £11.25 | £12.50 | £135.00 | Sep flash 10% (window passed) |
75 Mbps Full Fibre | £13.50 | £15 | £162.00 | same sale window |
150 Mbps Full Fibre | £17.10 | £19 | £205.20 | lower flash tier |
500 Mbps Full Fibre | £18.90 | £21 | £226.80 | lower flash tier |
1 Gbps Full Fibre | £22.50 | £25 | £270.00 | headline gig tier on sale |
150 Mbps (alt tier) | £22.50 | £25 | £270.00 | higher flash card |
500 Mbps (alt tier) | £25.20 | £28 | £302.40 | higher flash card |
1 Gbps (alt tier) | £27 | £30 | £324.00 | higher flash card |
1 Gbps Premium WiFi | £28.80 | £32 | £345.60 | mesh/premium add |
2.5 Gbps | £35.10 | £39 | £421.20 | multi-gig |
5 Gbps Premium WiFi | £56.70 | £63 | £680.40 | top shop card |
Virgin Media M350 Fibre — £25.99/mo · 24 months
- M350 fibre broadband — check Virgin Media postcode coverage
- £25.99 a month on a 24-month contract
- Useful alternative when an altnet full fibre network does not reach your address
Source: communityfibre.co.uk/cheap-broadband-deals deal cards checked on 15 September 2026, showing sale and was prices with “Flash sale - 10% off” and offer end 16.09.2026. Year-1 monthly cash = flash monthly × 12 (does not net the later April £3 steps or the end-of-contract £4). A separate comparison table on the same site still shows CF ~350 Mbps at £21.00 and ~920 Mbps at £25.00 on 24-month comparison rows — useful context, but the flash cards were the September sale lead.
Flash window — passed 16 September 2026 23:59 UK
The 10% new-customer flash was time-boxed to 16 September 2026 23:59 UK (own-shop “16.09.2026” / ISPreview same deadline). That join window has passed and is no longer open for new joiners — re-open communityfibre.co.uk for today’s cards rather than relying on this table’s flash pounds. ISPreview’s 18 August 2026 write-up matches the same end date and the return of mid-contract £3 April rises after a brief no-hike window earlier in summer. Shop legal copy on the page we checked stated prices for new customers only, £4 more when out of contract, and £3 annually in April thereafter.
No-rise vs £3 April — read the checkout
Community Fibre briefly marketed no mid-contract hike earlier in 2026; the current flash path reintroduces pounds-and-pence April steps. That is not RPI mystery maths — it is a stated £3. Still model Year-2 and Year-3 if you take 24 months. A “cheap” 1 Gbps at £22.50 flash is not the same bill in April 2028.
London availability — postcode or it did not happen
Altnet coverage is patchy even inside the M25. Community Fibre’s in-my-area / checker flow is the only honest availability source. A deal that looks brilliant in Hackney may not be available in a street two postcodes over. If the checker says no, look at Hyperoptic, G.Network or Openreach full fibre on the SwitchSquid broadband deals page.
How CF stacks against nearby published comparisons
Community Fibre’s own comparison tables (dated early September 2026 on its site) put CF 300-class and 1 Gig rows against BT, Sky, Virgin, EE, TalkTalk, Plusnet and Hyperoptic samples from selected London postcodes. Those competitor monthly figures are Community Fibre’s published comparison set — useful for narrative, not a substitute for opening each rival’s own basket. On cash alone, CF’s flash 1 Gbps at £22.50 is aggressive versus many national gig cards in that same comparison block. Coverage and customer-service appetite still matter more than a £3 gap.
Which speed should a London flat actually buy?
35–75 Mbps — single person, light streaming, mostly phones. £11.25–£13.50 flash is the cash story.
150–500 Mbps — WFH video + 4K + kids’ tablets. £17.10–£25.20 flash range.
1 Gbps — busy household, uploads, cloud backups. £22.50 flash lead on the lower gig card.
2.5–5 Gbps — niche; only if you have a use for multi-gig LAN and the building can terminate it cleanly.
Symmetric marketing is nice; Wi-Fi is still the bottleneck in most Victorian conversions. Premium WiFi cards cost more monthly — only buy mesh if the flat’s walls already defeated the standard router.
Switching tips for London renters
Run the Community Fibre postcode checker before you give notice elsewhere.
Photograph the existing master socket / fibre terminate point.
Ask the building manager about wayleave if you are in a block — altnets sometimes need it.
Diary the first April rise and your contract end date.
Keep the old ISP live until the new line is tested at evening peak.
When you want national Openreach or Virgin paths as well, use the broadband deals page rather than forcing every London postcode into a Community Fibre-only story.
Contract length, satisfaction windows and exit reality
Community Fibre’s flash cards sit on fixed terms — commonly 12 or 24 months depending on the plan. Community Fibre’s deals page does not always show the contract length next to the price, so treat checkout as the final word. A 24-month 1 Gbps at £22.50 flash looks cheaper per month than a 12-month twin at £27, but you are signing longer exposure to the April £3 steps and the end-of-contract £4 bump. If you rent and might move in month 14, model early-termination maths before you chase the lower monthly.
Shop marketing elsewhere on the Community Fibre site has referenced a satisfaction-style leave window in past campaigns (for example leave within 60 days if issues cannot be fixed). That is a customer-service promise, not a substitute for reading the order summary. Screenshot the flash end date, the monthly pound, the April rise line and the out-of-contract +£4 line before you click pay.
Upload speeds, Wi-Fi and the “full fibre” label
Full fibre to the home is the product class — light, not magic. In a London converted warehouse with foil-backed insulation, a 1 Gbps terminate point can still deliver 80 Mbps to the back bedroom on Wi-Fi 5. Walk the flat with a speed-test app on the day of install. If the master socket lands in a hallway cupboard, budget for a wired backhaul mesh or a Premium WiFi card only after that test fails. Do not buy 2.5 Gbps to compensate for brick walls.
Upload matters for creators and VPN-heavy WFH. Community Fibre’s symmetric marketing is part of the altnet pitch versus classic Openreach packages that still advertise uneven up/down. Verify the upload figure on the exact plan at checkout — marketing pages blur tiers.
How to choose in Zone 2
If the checker says yes and the household is two people who stream: start at 150 Mbps flash (£17.10) unless you already know you need gig uploads. If you are four people on simultaneous 4K and cloud backups: 1 Gbps flash at £22.50 was the cash/lead speed sweet spot on the September lower gig card. If you are a single renter who mostly uses phones: 35 Mbps at £11.25 is the honest cash lead — ignore multi-gig envy. Then confirm today’s card price on communityfibre.co.uk (the September flash window has passed), and diary the first April rise so the bill does not “surprise” you.
Finally, keep one tab open on the SwitchSquid broadband deals page for Openreach and cable alternatives in the same postcode. Community Fibre often wins on price in London; it does not win every building.
Virgin Media M350 Fibre — £25.99/mo · 24 months
- M350 fibre broadband, no TV pack
- £25.99 a month on a 24-month contract — confirm the live price on virginmedia.com
- Check availability for your postcode before you leave another ISP
FAQ
What is the cheapest Community Fibre London deal on 16 September 2026?
On Community Fibre’s own flash sale cards when we checked, 35 Mbps Full Fibre at £11.25 a month (was £12.50) — £135 over 12 months of that monthly — with the 10% sale running to 16.09.2026 (that window has passed).
How much is Community Fibre 1 Gbps on the flash sale?
The lower 1 Gbps Full Fibre card prints £22.50 (was £25), which is £270 Year-1 monthly cash before April rise steps. An alt 1 Gbps card prints £27 (was £30).
Is the 10% flash still open?
No — own-shop copy gave 16.09.2026 as the last day, so that join window has passed. Re-check communityfibre.co.uk for current prices, or compare the live Full Fibre deals on this page.
Does Community Fibre raise prices mid-contract?
Current shop wording: £3 per month every April from April 2027 on the flash path, and £4 more at the end of the contract versus the last month.
Is Community Fibre available outside London?
Footprint is London / South East focused. Only the postcode checker decides — do not assume a deal from this page installs nationally.
Are there set-up fees?
Flash cards we checked in September showed £0 set-up and router included. Confirm at checkout.
Should I pick Premium WiFi?
Only if the standard router failed a real-world walk-round of your flat. Premium cards add monthly cash (for example 1 Gbps Premium WiFi flash £28.80).
How does this compare with Plusnet or Hyperoptic?
Use each retailer’s own shop on the day you buy. CF’s comparison table is a starting point; SwitchSquid’s broadband deals page lets you compare other providers too.
London fibre moves fast, so check communityfibre.co.uk before you sign, or use the BT and Virgin Media deals above if you would rather order one of those.
Community Fibre prices on this page come from Community Fibre’s own site, and there are no links to its site here. Confirm the £3 April and £4 end-of-contract rises at checkout.
