Cardiff West Broadband Coverage
Westminster parliamentary constituency · Wales · 49,632 premises
Full-fibre in Cardiff West runs ahead of the national curve, 88.0% against a 81% UK average.
The verdict
Cardiff West ranks #212 of 650 constituencies for full-fibre (88.0%) and #320 for the fixed/FWA availability gap (0.0%) - those two corpus maps diverge.
Broadband Coverage in Cardiff West
Cardiff West, part of Wales, has 49,632 premises. 99.5% of premises have superfast (30 Mbit/s or more) broadband and 95.7% reach ultrafast (300 Mbit/s or more); underpinning both is a full-fibre figure of 88.0%, above-average, and a gigabit-capable figure of 95.3% once cable upgrades are counted.
On connectivity for all households, Cardiff West has near-universal fixed and fixed-wireless broadband availability: fewer than 1% of premises cannot receive a decent service. Full-fibre sits in the top third of UK seats at 88.0%, and Ofcom's Spring 2026 measure shows every measured premise can receive decent fixed or fixed-wireless broadband.
Where these figures come from
Figures are drawn from Ofcom's Connected Nations Spring 2026 report (January 2026 snapshot, published May 2026 (r1)), which aggregates postcode-sector data to constituency level. They represent coverage availability from at least one network operator, not the proportion of households that have subscribed to a given speed tier, nor the typical or guaranteed speeds that customers actually receive. Nearby constituencies in Wales with comparable full-fibre coverage are listed below.
Coverage Metrics
Where Cardiff West Sits Nationally
Cardiff West vs every UK parliamentary constituency
Full-fibre coverage distribution across all 650 UK constituencies. Cardiff West's 88.0% places it in the highlighted band.
88% Top 33% higher than 67% of 650 UK constituencies
every UK parliamentary constituency, bucketed by value
Each bar is a band; taller bars hold more UK constituencies. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source Ofcom Connected Nations Spring 2026 · January 2026 snapshot, published May 2026 (r1)
Related
Source: Source: Ofcom Connected Nations Spring 2026 (January 2026 snapshot, published May 2026 (r1)).
Nationwide constituencies with similar full-fibre or gigabit coverage
Two Ofcom peer sets for Cardiff West (top-third full-fibre at 88.0%), both outside Wales so the neighborhoods are not the same-nation Nearby block above.
Similar full-fibre
Nearest other-nation constituencies by full-fibre coverage (88.0% here; floor ≥5,000 premises).
Similar gigabit
Nearest other-nation constituencies by gigabit-capable coverage (95.3% here).
What 88.0% full-fibre means for Cardiff West
Cardiff West is 7.0pp ahead of the 81% UK average, but coverage still varies street by street.
- Check your own address, a constituency average can hide big street-by-street differences in coverage. Check your postcode
- See how Cardiff West ranks against every other UK constituency, not just the national average. Full UK rankings
- Understand what full-fibre actually gets you before switching. How Ofcom Connected Nations works
Coverage figures are Ofcom Connected Nations availability data, not a guarantee of service at any single address; always check before switching.
Frequently Asked Questions
How does Cardiff West's full-fibre coverage compare with other UK constituencies?
Ofcom Connected Nations Spring 2026 puts full-fibre (FTTP) at 88.0% of premises in Cardiff West, ranked #212 of 650 UK constituencies (higher than 438 of them). The UK average is 81%.
Is the fixed/FWA availability gap closed in Cardiff West?
Ofcom's Spring 2026 measure shows every measured premise in Cardiff West can receive decent broadband from a fixed line or fixed-wireless network.
This constituency's figures are computed directly from Ofcom Connected Nations data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.