19 providers offer 278 broadband deals in St Margaret and South Marston, from £13.50 a month and up to 5,000 Mbps. Typical measured speed is 147 Mbps down and 24 Mbps up, 46% above the UK download average.
Best value broadband deal in St Margaret and South Marston, Swindon (SN3)
The best value in St Margaret and South Marston, Swindon (SN3) on full first-year cost is Plusnet's Full Fibre 145: £292 across year one, about £24 a month. A £155 reward card is bundled in. 145 Mbps covers streaming, video calls and working from home.
Best value in St Margaret and South Marston, Swindon (SN3)
£22.99/mo
rises to £26.99 in March 2027 (+£4)
Avg £26.32/mo over contract · £632 total over 24 months
Fastest broadband deal in St Margaret and South Marston, Swindon (SN3)
The fastest deal available in St Margaret and South Marston, Swindon (SN3) is Full Fibre 5 Gigafast+ from Sky at 5,000 Mbps.
Fastest in St Margaret and South Marston, Swindon (SN3)
Full Fibre 5 Gigafast+
3000 Mbps upload · Full Fibre
Best for power users & big households
£80/mo
No rises, no surprises.
£1925 total over 24 months
Cheapest broadband deal in St Margaret and South Marston, Swindon (SN3)
The cheapest deal in St Margaret and South Marston, Swindon (SN3) is 150Mb Full Fibre CityFibre (24 Months) from 4th Utility at £13.50 a month for 150 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £13.50 is an intro price that rises to £18.00 a month after the intro window, making the real first-year cost £162. Above the UK average on download.
Cheapest in St Margaret and South Marston, Swindon (SN3)
150Mb Full Fibre CityFibre (24 Months)
150 Mbps upload · Full Fibre
Best for 2–3 person homes, 4K streaming
£13.50/mo
for 12 months, then £18/mo
Avg £15.75/mo over contract · £378 total over 24 months
Compare broadband deals in St Margaret and South Marston, Swindon (SN3)
250Mb Full Fibre CityFibre (24 Months)
250 Mbps upload · Full Fibre
Best for 2–3 person homes, 4K streaming
£16.50/mo
for 12 months, then £22/mo
Avg £19.25/mo over contract · £462 total over 24 months
£29/mo
rises to £31 in April 2027 (+£2)
Avg £30.50/mo over contract · £732 total over 24 months
Sky Full Fibre Gigafast
100 Mbps upload · Full Fibre
Best for power users & big households
£31/mo
No rises, no surprises.
£749 total over 24 months
150Mb Full Fibre CityFibre (24 Months)
150 Mbps upload · Full Fibre
Best for 2–3 person homes, 4K streaming
£18.50/mo
for 12 months, then £23.50/mo
Avg £21/mo over contract · £504 total over 24 months
Broadband providers in St Margaret and South Marston, Swindon (SN3)
19 providers serve St Margaret and South Marston, Swindon (SN3), with Sky the fastest at 5,000 Mbps.
Ranked by Ofcom complaints per 100,000 customers, fewest first. A down arrow is below the industry average, up is above, and a dash means Ofcom publishes no figure for that provider (usually because it is below Ofcom's 1.5% market-share reporting threshold). A small diagonal arrow shows the past-year trend (↘ improving, ↗ getting worse).
Ofcom records the typical St Margaret and South Marston, Swindon (SN3) download speed at 147 Mbps.
Upgrade nudge
Room to upgrade in St Margaret and South Marston, Swindon (SN3)
Only 22% of the 17,000 connections here are on 300Mbps or faster, even though 96% can get gigabit.
The faster line is already there. For most of these homes it is the contract holding them back, not the infrastructure.
Is your broadband good enough?
The typical St Margaret and South Marston, Swindon (SN3) line runs 147 Mbps.
Working from home
OKStreaming and family use
GoodWhat speeds are people actually getting?
Gigabit reaches 96% of St Margaret and South Marston, Swindon (SN3), and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach St Margaret and South Marston, Swindon (SN3)?
The wholesale networks carrying St Margaret and South Marston, Swindon (SN3) broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
Independent altnets reaching St Margaret and South Marston, Swindon (SN3), listed below. The companies that build their own fibre rather than reselling someone else's, which is often the cheapest gigabit on the street.
- CityFibre: Sky, TalkTalk, The One Broadband, Vodafone, Zen Internet
- 4th Utility: 4th Utility, Rise Fibre
- Hyperoptic
Behind the altnets, Openreach and Virgin Media O2 run as the major-network options (Openreach is the default network, in case the rest haven't reached your street).
19 providers are live with broadband deals in St Margaret and South Marston, Swindon (SN3).
What broadband coverage does St Margaret and South Marston, Swindon (SN3) have?
Superfast broadband reaches 98% of St Margaret and South Marston, Swindon (SN3) premises and gigabit 96%, on Ofcom's premise-level data.
Can I rely on mobile broadband in St Margaret and South Marston, Swindon (SN3)?
Outdoor 5G reaches 100% of St Margaret and South Marston, Swindon (SN3) homes. Here is how mobile holds up if the line drops.
5G & 4G home broadband
Outdoor 5G covers 100% of St Margaret and South Marston, Swindon (SN3), enough for a 5G home-broadband hub to stand in for a fixed line.
How St Margaret and South Marston, Swindon (SN3) compares within Swindon
Across 7 postcode districts in Swindon, by premises count, typical speed and gigabit coverage.
Nearby areas
Frequently asked questions
Ready to switch
See what's actually live in St Margaret and South Marston, Swindon (SN3).
Enter your address and we'll show every deal you can genuinely order on your line, ranked by what you'll pay across the whole contract, not by who pays us.
* Based on Go.Compare research estimating that 28% of UK broadband users pay for faster broadband speeds than they need (which we interpret as overpaying), equivalent to around 7.5m UK households.
Speed and coverage figures for St Margaret and South Marston, Swindon (SN3)come from Ofcom's Connected Nations data, current to January 2026. Deal prices are pulled live from providers. Compiled by the FindBroadband team. See how we rank and source our data.