Website performance
Is Your Trade Website Too Slow on Mobile? Benchmark It Against 30,399 UK Sites
A 2026 UK trades study measured mobile loading across more than 30,000 websites. The gap between desktop and mobile was striking, and it gives trades businesses a useful benchmark for their own site.
A website can feel fast on the office computer and still be painfully slow for the customer standing outside with a phone. That is not a theoretical edge case for trades businesses. Mobile is often the device used when somebody is checking a company from a van, a recommendation, a Google result or a job seen nearby.
The State of UK Trades Websites 2026 gives us an unusually large benchmark. The researchers attempted Lighthouse audits on 43,738 UK trades business websites and received at least one usable automated result from 31,030. For mobile Largest Contentful Paint, or LCP, 30,399 websites returned a measurement.
The mobile benchmark is poor
The median mobile LCP in the study was 6.7 seconds. 72.5% of the 30,399 sites with a mobile LCP measurement were over 4 seconds in the lab test. By comparison, the median desktop LCP reported by the study was 1.4 seconds across 30,483 websites.
That gap matters more than the headline score. It suggests many trades websites can appear acceptable on desktop while delivering a much weaker mobile experience.
Benchmark your own site
Run your homepage through Google PageSpeed Insights using the mobile test. Look for Largest Contentful Paint. One run is not a perfect representation of every real visitor, but it gives you a comparable lab measurement.
Under 2.5 seconds: you are in the range Google describes as good for LCP. Between 2.5 and 4 seconds: improvement is worthwhile. Over 4 seconds: the test is in the poor band, and you are also in the range occupied by 72.5% of the measured trade websites in the 2026 study.
Do not turn the number into a vanity score. The practical question is whether the delay is stopping customers seeing the main information quickly enough.
Why mobile speed becomes a trust issue
A slow site does not merely annoy people. It changes the first impression. If the page hesitates, jumps or keeps a blank hero area on screen while somebody is trying to find a phone number, the business feels less immediate and less organised than it probably is in real life.
Good design is not just what a page looks like once everything has loaded. Pretty does not always mean good design if the customer has to wait for the design to become usable.
Do not blame the platform too quickly
The same study reported differences between platforms. Among sites where a platform could be identified, median mobile Performance was 61 for WordPress across 9,869 websites and 69 for Wix across 5,031. But the researchers explicitly warn that this is observational data, not evidence that the platform caused the difference.
That distinction is important. A slow WordPress site may be slow because of its theme, hosting, plugins, images or years of accumulated changes. A fast site on another platform may have a much simpler build. The useful action is to diagnose the actual page, not choose a winner from one table.
A simple four part mobile check
1. Measure. Record mobile LCP, Performance and whether the audit completes reliably.
2. Observe. Open the site on a real phone over mobile data. Note when the business name, main message and contact action become usable.
3. Remove. Check for oversized images, unnecessary scripts, video backgrounds, plugin clutter and anything else that adds weight without helping the customer.
4. Recheck. Improvements should be verified after changes rather than assumed.
The study has limits
The researchers are unusually clear about them. The tests were laboratory measurements, not records of what every visitor experienced. The two collection waves covered different towns and trade mixes. Some automated audits failed, and platform identification was only possible for part of the sample.
Those limitations are precisely why the study is useful. It tells us what was measured and what was not. The safest conclusion is not that every trades website is slow. It is that poor mobile performance is common enough that checking your own site is worthwhile.
The business test matters more than the score
If your website loads quickly enough for a customer to understand what you do, see proof and contact you without friction, the performance work is doing its job. If the site scores well but still makes those things hard, a better score has not solved the customer problem.
Sources and method
These sources support the factual claims and benchmarks used above. Where a study is vendor produced, its sample and stated limitations are treated as part of the finding rather than as a national estimate.
The State of UK Trades Websites 2026, Websites for Tradespeople