PORTSMOUTH SOUTH Broadband Coverage
Westminster parliamentary constituency · England · 50,831 premises
At 81.3%, full-fibre coverage here outpaces the 81% UK national average.
The verdict
PORTSMOUTH SOUTH ranks #359 of 650 constituencies for full-fibre (81.3%) and #543 for the fixed/FWA availability gap (0.0%) - those two corpus maps diverge.
Broadband Coverage in PORTSMOUTH SOUTH
50,831 premises make up the PORTSMOUTH SOUTH constituency in England. Its full-fibre availability of 81.3% is above-average; add in gigabit-capable cable upgrades and that figure rises to 95.8%. Superfast broadband (30 Mbit/s or more) is available to 99.2% of premises, with 96.5% able to reach ultrafast (300 Mbit/s or more) speeds.
On connectivity for all households, PORTSMOUTH SOUTH has near-universal fixed and fixed-wireless broadband availability: fewer than 1% of premises cannot receive a decent service. Mid-pack full-fibre at 81.3% is 0.3pp above the 81% UK average; gigabit-capable coverage is 95.8% and ultrafast 96.5%.
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 England with comparable full-fibre coverage are listed below.
Coverage Metrics
Where PORTSMOUTH SOUTH Sits Nationally
PORTSMOUTH SOUTH vs every UK parliamentary constituency
Full-fibre coverage distribution across all 650 UK constituencies. PORTSMOUTH SOUTH's 81.3% places it in the highlighted band.
81.3% 359th of 650 higher than 291 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 PORTSMOUTH SOUTH (mid-pack full-fibre at 81.3%), both outside England so the neighborhoods are not the same-nation Nearby block above.
Similar full-fibre
Nearest other-nation constituencies by full-fibre coverage (81.3% here; floor ≥5,000 premises).
Similar gigabit
Nearest other-nation constituencies by gigabit-capable coverage (95.8% here).
Frequently Asked Questions
Where does PORTSMOUTH SOUTH sit in the national full-fibre distribution?
PORTSMOUTH SOUTH has 81.3% full-fibre coverage, 0.3pp above the 81% UK average (rank #359 of 650), higher than 291 of 650 UK constituencies. Gigabit-capable coverage is 95.8%.
What share of PORTSMOUTH SOUTH premises still lack decent fixed/FWA broadband?
Ofcom's Spring 2026 measure shows all measured premises in PORTSMOUTH SOUTH can receive decent fixed or fixed-wireless broadband. Ultrafast (≥300 Mbit/s) coverage is 96.5%.
What 81.3% full-fibre means for PORTSMOUTH SOUTH
PORTSMOUTH SOUTH is 0.3pp 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 PORTSMOUTH SOUTH 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.
Source: Ofcom Connected Nations Spring 2026, January 2026 release (r1). Published under the Open Government Licence v3.0. Figures represent premises-level coverage availability, not actual subscriptions or speeds experienced.
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.