Sky Broadband Speed Test (UK) — Real Speeds & Fixes

Sky's Broadband Buddy and Wi-Fi Guarantee report speed at the router , which is why they can say everything is fine while your laptop is slow. Settle the question with one wired test into the Sky Hub: if that matches your plan, the gap is Wi-Fi coverage in your home.

Because Sky runs on Openreach, the line itself behaves like any other Openreach product — FTTC is distance-limited, FTTP is not.

Sky Broadband resells the Openreach fibre network with its own routers (Sky Hub / Sky Max). Performance is comparable to BT on the same line product; the differences are in router quality and customer service.

Sky sells whichever Openreach product exists at your exact address, so the same plan name can mean copper at one house and full fibre at the next. Full Fibre and Gigafast depend on Openreach's build reaching your property, and some flats are served by a shared internal cable that limits options. Check the specific address on Sky's checker before ordering an upgrade.

Plans and realistic speeds

Sky Broadband Essential 36 Mbps: 30-38 Mbps down, 8 Mbps up
Sky Superfast 67 Mbps: 55-67 Mbps down, 18 Mbps up
Sky Full Fibre 100 / 500 / 900: 95-110, 490-540 and 880-940 Mbps
Sky Gigafast 1 Gbps: 900-940 Mbps wired

Common issues and how to fix them

Wi-Fi Guarantee says you're getting full speed but tests disagree: Sky measures speed at the router, not at your device. Run a wired test to confirm; if wired matches the plan, the issue is Wi-Fi coverage.
Sky Hub overheating: The older Sky Q Hub throttles when warm. Move it off shelves enclosed on three sides.
Streaming on Sky Stream stutters: If your Sky Stream puck is wireless, it competes with everything else on 5 GHz. Hard-wire it via the included Ethernet adapter.
Speed fell after switching to Sky from another provider: A provider change on the same copper line resets Openreach DLM. Sync rates settle over roughly 10 days of continuous uptime, so avoid rebooting the Hub repeatedly during that window.

Typical latency

Within UK to London PoP: 5-14 ms
London to Amsterdam: 8-15 ms
London to New York: 75-90 ms
London to Tokyo: 220-250 ms

Wired vs Wi-Fi checks

Run three wired tests into the Sky Hub and take the median before changing anything.
Compare Broadband Buddy's reported figure with your wired result; they measure different points in the chain.
Test Wi-Fi next to the Hub and then in the room where the problem shows up — the difference is your coverage gap.
Hard-wire or move any Sky Stream puck before judging Wi-Fi results, since it competes for the same 5 GHz airtime.

Reading your result against your plan

Compare your wired result with the guaranteed minimum speed in your Sky contract, which is the figure Ofcom's speed code is enforced against.
On Superfast (FTTC) a steady result in the 55-67 Mbps band is the product working as sold; the cabinet distance sets the ceiling.
On Full Fibre plans, expect within about 10% of plan wired. A third of plan wired is a fault worth reporting, not a tuning problem.
Gigafast tops out near 940 Mbps through a single gigabit Ethernet port — that limit is your adapter, not Sky.