Swish Fibre Speed Test Guide (2026)

Swish Fibre customers should receive average download speeds of 400Mbps or 900Mbps depending on their package, with symmetric upload speeds matching the download — a full fibre advantage. Swish Fibre is a Home Counties FTTP provider serving around 250,000 premises across Berkshire, Buckinghamshire, Essex, Hertfordshire, Kent, Surrey, Sussex, Oxfordshire, Northamptonshire, Hampshire, and Yorkshire towns, using its own XGS-PON network alongside CityFibre and Openreach in some areas.

Expected Swish Fibre Speeds by Package

Swish Fibre offers two main residential tiers. Swish 400 delivers 400Mbps symmetric (equal download and upload) for £35 per month on an 18-month contract. Swish 900 provides 900Mbps symmetric for £55 per month on the same 18-month term — a router is included with both packages. Swish also offers lower tiers via CityFibre in some areas: 150Mbps, 500Mbps, and 900Mbps at prices from £32–£38 per month on 24-month contracts. Speeds tested in real-world conditions have reportedly reached over 1,150Mbps on Swish's own XGS-PON network, and latency has been independently tested at as low as 2ms — among the best of any UK residential provider. For comparison, Gigaclear serves a similar rural demographic but focuses on different counties. Swish does not impose mid-contract price rises, which provides long-term cost predictability. Its XGS-PON technology is also future-proof, capable of multi-gigabit speeds as demand grows.

How to Run a Speed Test on Swish Fibre

To get the most accurate Swish Fibre speed test, connect your computer directly to the Swish-supplied eero Pro 6E router using an ethernet cable. The eero Pro 6E supports Wi-Fi 6E on the 6GHz band, which can deliver excellent wireless performance if your devices support it, but ethernet remains the gold standard for accuracy. On the Swish 400 plan, a standard Gigabit ethernet port is sufficient. On the Swish 900 plan, confirm your ethernet adapter supports at least 1Gbps — many laptop ethernet adapters are Gigabit, but older machines may have 100Mbps ports that will cap your result at around 94Mbps. Pause all background activity including cloud storage sync, app updates, and streaming on every device in the home. Run the test three or more times and average the results. Because Swish delivers symmetric speeds, your upload result should be very close to your download — this is a quick sanity check that your connection is provisioned correctly.

Understanding Your Swish Fibre Speed Test Results

Your Swish speed test displays four important figures. Download speed (Mbps) tells you how fast data arrives at your home — governing streaming quality, web speed, and download times. Upload speed on Swish should match or nearly match your download speed, thanks to the symmetric nature of Swish's XGS-PON full fibre. A large gap between download and upload (for example, 400Mbps down but only 10Mbps up) would indicate a provisioning error or a misconfigured ONT, and you should contact Swish support. Latency (ping) on Swish's FTTP network has been recorded as low as 2ms in test conditions, though typical residential results are around 5–15ms to UK servers. Jitter should be under 3ms on a stable full fibre connection. Swish's own XGS-PON network is independent of Openreach, so any performance issues are resolved by Swish's engineering team rather than Openreach. For households previously on BT FTTC (part-fibre) in the Home Counties, the improvement in both speed and latency when switching to Swish FTTP is typically dramatic.

How to Improve Your Swish Fibre Speeds

Swish includes an eero Pro 6E mesh router with its packages — one of the most capable routers available — so Wi-Fi performance should be excellent in most homes. If coverage is still inconsistent in a larger property, you can add extra eero nodes to extend the mesh. Position the primary eero unit centrally in your home with a clear sightline to frequently used devices. Avoid placing it inside cupboards or behind the television. Ethernet connections from the eero to gaming consoles, smart TVs, and desktops will always achieve the best speeds and lowest latency. Ensure the ethernet cable between your ONT (optical network terminal) and the eero is Cat5e or better — older Cat5 or patch cables can limit throughput at higher speeds. If you experience unexplained slowdowns, restart the eero from the app and check for firmware updates. Swish does not impose mid-contract price rises, unlike most Openreach ISPs such as Sky where prices can increase annually under CPI-linked rises.

Compare Broadband Deals at Your Address

Swish Fibre serves a growing footprint across the Home Counties and parts of Yorkshire. Use CompareFibre to check whether Swish Fibre is available at your address. Swish 400 starts from £35 per month on an 18-month contract with an eero Pro 6E router included.

Frequently Asked Questions

Are Swish Fibre speeds truly symmetric?

Yes. On Swish Fibre's own XGS-PON network, upload and download speeds are symmetric — meaning a 400Mbps plan delivers 400Mbps in both directions. This makes Swish particularly suited for home workers, content creators, and households with multiple people simultaneously uploading and downloading. Real-world tests have achieved over 8,500Mbps upload on Swish's fastest configurations in lab conditions.

What router does Swish Fibre provide?

Swish includes an eero Pro 6E mesh router free with its packages. The eero Pro 6E is a high-performance tri-band Wi-Fi 6E router worth around £250, capable of handling dozens of simultaneous devices. It is managed via the eero app, which also offers parental controls and basic network monitoring.

Where does Swish Fibre cover?

Swish Fibre covers approximately 250,000 premises across Berkshire, Buckinghamshire, Essex, Hertfordshire, Kent, Surrey, Sussex, Oxfordshire, Northamptonshire, Hampshire, and a number of Yorkshire towns. The network is expanding. Use Swish's postcode checker to confirm availability at your specific address.

Related Guides

Swish Fibre Broadband Reviews · Gigaclear Fibre Speed Test · Wessex Internet Speed Test · Broadband Speed Guide · Home Counties Fibre Broadband

Methodology

This guide is based on publicly available data from Ofcom, provider websites, and independent sources including ISPreview.co.uk, Thinkbroadband, and Point Topic. Pricing, speeds, and availability were verified in April 2026 and are subject to change. CompareFibre is editorially independent — providers do not pay for placement or influence our recommendations.