BroadbandSwitch.uk relaunches Pulse speed test to measure lag under load

BroadbandSwitch.uk has relaunched its free Pulse speed test with a new focus on latency under load, aiming to show why broadband can feel slow in the evening even when headline download speeds look fine. The browser-based tool runs in about 30 seconds, stores nothing and adds a router check so users can tell whether the problem is Wi-Fi, the line or the package they buy.

Why it matters: - Broadband users often judge service by a headline speed number, but lag under load is what can break video calls, gaming and live TV when the home network is busy. - Ofcom’s figures show peak-time download speed barely moves versus the daily average, while latency and queueing are what affect real-time performance. - The relaunch is designed to give households a clearer fix: adjust Wi-Fi, challenge the provider, or switch package.

What happened: - BroadbandSwitch.uk relaunched Pulse, its free broadband speed test, on its website. - The test runs in a browser in about 30 seconds. - Pulse requires no sign-up and no app. - Nothing is stored and nothing is sent to BroadbandSwitch.uk. - The test ends with three questions: whether the problem is Wi-Fi or the line, whether the household is getting what it pays for, and whether it could do better at its postcode. - The relaunch replaces the old composite Pulse Score with a single result screen.

The details: - Pulse measures download speed, lag when the line is quiet, lag when the line is full, and how steady that lag is. - Pulse does not measure upload. - Download speed is the highest sustained five seconds of a ten-second download over six streams. - Quiet-line lag is the middle value of 12 timed requests while the line is idle. - Busy-line lag is measured while timed requests run every 450 milliseconds during a full download. - The increase from quiet lag to busy lag is graded from A+ to F. - Steadiness, or jitter, tracks how much lag varies from one request to the next. - The result screen shows the download number, one verdict sentence and three traffic lights for download, lag and lag under load. - A “More detail” area shows the grades, the lag bars, the share of advertised speed delivered and the cost per megabit on the bill. - Every result includes a reference the household can keep. - The router check runs a short second download a metre from the router, by cable or on the 5 GHz band, and compares it with the first result. - A big jump points to Wi-Fi as the bottleneck. - A similar result points to the broadband line as the limit. - Ofcom’s guidance says a slow Wi-Fi test does not always mean the broadband line is faulty. - Ofcom recommends a network cable instead of Wi-Fi where possible. - Ofcom also advises placing the router out in the open, off the floor and roughly central in the home. - Ofcom’s peak-time window is 8pm to 10pm. - Ofcom’s last home broadband performance report put average peak-time download speed at 67.7 Mbps against an average maximum of 71.0 Mbps, or 95%. - Full fibre lines measured by Ofcom had the lowest lag of any technology, between 4.9 and 7.3 milliseconds, versus around 24 milliseconds for ADSL. - Ofcom says most online activities need a response in under 100 milliseconds, and some online games in under 50. - The average UK home broadband connection used 583 GB of data a month in July 2025, up 10% in a year. - Ofcom says if a line drops below its minimum guaranteed download speed and the provider cannot fix it within 30 calendar days, the customer may be able to leave without penalty. - Ofcom’s automatic compensation rates in force since 1 April 2026 are £6.46 a day for a delayed start, £32.31 for a missed engineer appointment and £10.34 a day for a total loss of service not fixed after two working days. - Ofcom’s Broadband Speeds Code of Practice includes BT, EE, NOW Broadband, Plusnet, Sky, TalkTalk, Utility Warehouse, Virgin Media and Zen Internet as residential signatories. - If a household keeps three evening results with date and time, those results can support a complaint. - If a provider is in Ofcom’s compensation scheme, unpaid or unresolved issues can go to the Communications Ombudsman or CISAS after six weeks. - The waiting period for escalation was cut from eight weeks to six on 8 April 2026.

Between the lines: - The product is less about raw speed and more about exposing the queue that builds up when several people in a home use the connection at once. - The focus on latency under load matters because a line can look fine on a quiet test and still fail when the household is active. - The new one-screen layout is meant to make the result easier to understand and act on. - BroadbandSwitch.uk is also pushing users toward a practical next step, including switching, rather than leaving them with a number alone.

What’s next: - BroadbandSwitch.uk says users should run the test more than once, including a quiet morning run and an evening run between 8pm and 10pm. - The site also offers a live broadband quality monitor that tracks lag, steadiness and bufferbloat over time. - Users who are limited by the line can compare postcode-level deals and let a new provider manage the switch under One Touch Switch. - BroadbandSwitch.uk says the switch process has been used for 3,431,195 switches by 3 September 2026. - The company’s postcode comparison tools show providers that reach an exact address, with the lowest monthly price first.

The bottom line: - Pulse is a browser-only speed test built to answer the question most broadband tests leave out: why a connection slows down when the home is busy.