🔝 Unchanged Top 3: Wikipedia, Indeed, and Gov remain the fastest websites in the UK, with excellent loading and interactivity metrics.
🚀 Biggest movers this month:
- Disney Plus climbs 4 spots with a -32 ms improvement on LCP.
- Tesco shaves off 393 ms on LCP and gains 4 positions.
- Pinterest drastically improves loading performance (LCP -1479 ms).
- SkyScanner improves INP by 25 ms and stabilizes CLS (-0.06).
📉 Challenges observed:
- Netflix & Vinted show slower loading and worse interactivity.
- Next, Rightmove, Gumtree: slight but impactful INP degradations.
📊 Sector insights:
- Travel remains the worst-performing vertical: only 7% of sites pass all Core Web Vitals — down from 16% in April.
In e-commerce, Aldi, Ikea, and John Lewis lead the pack, while Asos, H&M, and JD Sports show measurable progress.
It’s time to take a look at this month’s webperf rankings of the most visited sites in UK.
We are thrilled to launch our very first UK Speed Ranking. This ranking is divided into several categories: the 50 most visited sites, e-commerce sites, media sites, and travel sites. But before diving into the results, it’s crucial to remind why fast-loading websites are key to online success.
As a reminder, the score obtained for the sites presented in this article is calculated using a methodology based on CrUX (Chrome User Experience Report) data. In order to give the best evaluation of each site’s mobile web performance, we based our calculations on the weighting of the Lighthouse score :
- FCP represents 10% ;
- LCP represents 35% ;
- CLS represents 25% ;
- INP represents 30%.
CrUX provides an overall assessment of the Core Web Vitals metrics for each site analysed. This metric is calculated by taking the 28-day rolling average of the 75 percentile performance throughout the month. The overall performance score is determined by a weighted average of the scores for each metric. This score, rated out of 100, is used in the rankings below (so it is not the PageSpeed score that is used in the rankings below).
Why is speed crucial ?
Studies show that website performance directly impacts user experience, conversion rates, and revenue. According to Google, 53% of mobile site visitors leave a page that takes longer than three seconds to load. For UK e-commerce sites, this statistic is particularly concerning given the intense market competition.
A Deloitte study reveals that a 0.1-second improvement in mobile site speed can increase conversion rates by 8.4% for retail sites. These figures highlight the importance of prioritizing loading speed to stay competitive.
Top 50 : Webperf ranking of the top 50 most visited websites in the United Kingdom
Top 50 : Average of vital core web
🏆 TOP 3 HIGHLIGHTS :
- 🥇 Wikipedia keeps the #1 spot with flawless stability (CLS 0) and one of the fastest interaction times (INP 92 ms).
- 🥈 Indeed stays strong at #2, maintaining a green status across all metrics and an improved LCP of 1247 ms.
- 🥉 Gov.uk rounds out the top 3 with an exceptional loading time (LCP)- of just 681 ms.
📈 NOTABLE IMPROVEMENTS
Several shifts occurred within the top 15, driven by consistent performance gains:
- Disney Plus gains 4 positions with a smoother experience: –32 ms on LCP and –7 ms on INP.
- Tesco climbs 4 ranks after a major loading improvement — LCP drops by 393 ms and INP also improves slightly.
- Skyscanner moves up 3 places thanks to a reduction in INP (–25 ms) and a better page stability (CLS –0.06).
- Pinterest rises 2 ranks, significantly cutting its LCP by an impressive 1479 ms, showing real progress on loading performance.
These sites reflect ongoing efforts to improve web performance, which will likely continue to positively impact user experience and engagement. These improvements are the result of consistent efforts to optimize their systems, with particular attention paid to INP. It’s worth noting that having a good FID does not necessarily mean having a good INP! FID only measures the first interaction, whereas INP assesses interactivity throughout the entire browsing session. The efforts made by these players to improve their web performance metrics are not only beneficial for their rankings but are also crucial for providing a quality user experience, reducing bounce rates, and increasing engagement on their platforms.
📉 CHALLENGES IN THE RANKINGS
Some websites dropped in the ranking due to performance degradations or stronger competition:
- Mark & Spencer sees its CLS rise from 0.05 to 0.10 — still green, but edging toward the orange zone.
- Zoopla drops slightly with no significant change in performance metrics.
- Gumtree and Right Move both register a slower INP (+33 ms and +29 ms respectively), slightly hurting interactivity.
- Next also adds +11 ms to its INP, contributing to its 3-place drop.
- Vinted faces a clear performance hit: +158 ms on LCP and +21 ms on INP, resulting in a 4-rank fall.
- Netflix continues to struggle, with LCP up by +67 ms and INP deteriorating further to 58ms.
These declines highlight the ongoing challenge of maintaining web performance amidst evolving user expectations and technical demands.
| Website | Ranking | Ranking M-1 | Score | LCP (in ms) | INP (in ms) | CLS |
| Wikipedia | 1 (0) | 1 | 100 | 1061 | 92 | 0 |
| Indeed | 2 (0) | 2 | 99 | 1247 | 110 | 0 |
| Gov | 3 (0) | 3 | 99 | 681 | 126 | 0 |
| The guardian | 4 (0) | 4 | 99 | 910 | 120 | 0,06 |
| BBC | 5 (0) | 5 | 99 | 920 | 146 | 0 |
| Ikea | 6 (0) | 6 | 98 | 1319 | 160 | 0,02 |
| Mumsnet | 7 (1) | 8 | 97 | 1626 | 175 | 0,01 |
| Telegraph | 8 (-1) | 7 | 97 | 1706 | 141 | 0,07 |
| Office | 9 (15) | 24 | 97 | 2052 | 125 | 0 |
| Santander | 10 (-1) | 9 | 97 | 1774 | 163 | 0,01 |
| National Lottery | 11 (-1) | 10 | 97 | 1149 | 146 | 0,09 |
| Asos | 12 (3) | 15 | 97 | 1671 | 197 | 0,01 |
| Etsy | 13 (1) | 14 | 97 | 2133 | 139 | 0 |
| The Sun | 14 (2) | 16 | 96 | 1527 | 207 | 0,01 |
| Temu | 15 (-2) | 13 | 96 | 1727 | 189 | 0 |
| Amazon | 16 (-5) | 11 | 96 | 1528 | 163 | 0,09 |
| News.sky | 17 (-5) | 12 | 96 | 1417 | 116 | 0,11 |
| Ebay | 18 (-1) | 17 | 96 | 1443 | 222 | 0,01 |
| Independent | 19 (0) | 19 | 96 | 1299 | 220 | 0,06 |
| Daily Mail | 20 (1) | 21 | 95 | 1581 | 247 | 0,02 |
| Mark and Spencer | 21 (-3) | 18 | 94 | 1712 | 185 | 0,10 |
| Zoopla | 22 (-2) | 20 | 94 | 1712 | 246 | 0,04 |
| Ny Times | 23 (-1) | 22 | 94 | 2184 | 221 | 0,05 |
| Spotify | 24 (-1) | 23 | 93 | 2358 | 224 | 0,04 |
| Express | 25 (1) | 26 | 90 | 1887 | 339 | 0,03 |
| Disney Plus | 26 (4) | 30 | 89 | 2809 | 189 | 0,09 |
| Argos | 27 (1) | 28 | 89 | 1472 | 375 | 0,02 |
| Gumtree | 28 (-3) | 25 | 89 | 1682 | 377 | 0,05 |
| Diy | 29 (0) | 29 | 89 | 2138 | 324 | 0,06 |
| Right Move | 30 (-3) | 27 | 89 | 1577 | 337 | 0,1 |
| Paypal | 31 (0) | 31 | 88 | 2966 | 164 | 0,02 |
| Screwfix | 32 (0) | 32 | 86 | 2348 | 339 | 0,02 |
| Bt | 33 (0) | 33 | 83 | 2134 | 236 | 0,21 |
| Tesco | 34 (4) | 38 | 82 | 2508 | 395 | 0,06 |
| Ancestry | 35 (-1) | 34 | 81 | 2824 | 164 | 0,21 |
| Booking | 36 (0) | 36 | 81 | 2586 | 420 | 0 |
| Microsoft | 37 (0) | 37 | 81 | 2875 | 383 | 0 |
| Next | 38 (-3) | 35 | 80 | 2087 | 576 | 0,04 |
| Asda | 39 (0) | 39 | 72 | 1858 | 434 | 0,29 |
| Royal Mail | 40 (0) | 40 | 71 | 2296 | 185 | 0,88 |
| Just-eat | 41 (1) | 42 | 70 | 1797 | 280 | 0,71 |
| Sky scanner | 42 (3) | 45 | 68 | 2965 | 422 | 0,24 |
| Sky | 43 (1) | 44 | 68 | 3378 | 253 | 0,29 |
| Snapchat | 44 (-1) | 43 | 67 | 3466 | 532 | 0,01 |
| Vinted | 45 (-4) | 41 | 67 | 2799 | 269 | 0,48 |
| 46 (2) | 48 | 64 | 3746 | 494 | 0,07 | |
| Bet 365 | 47 (0) | 47 | 60 | 3153 | 372 | 0,52 |
| Netflix | 48 (-2) | 46 | 56 | 3499 | 1428 | 0 |
| Boots | 49 (1) | 50 | 43 | 3995 | 538 | 0,5 |
| Sainsburys | 50 (-1) | 49 | 42 | 4629 | 445 | 0,35 |
🔎 GENERAL OBSERVATIONS
- 26% of sites analyzed still have a poor CLS, a metric that significantly impacts user experience. A high CLS can lead to frustration, as page elements shift unexpectedly during loading.
- 60% of sites don’t have a green INP, the metric that replaced FID as of 12 March 2024. INP measures the latency of all interactions throughout a webpage’s lifecycle. The highest value—or near-highest for pages with many interactions—is recorded as the INP of the page. A low INP indicates that the page is reliably responsive at all times.
- Less than half of the top 50 sites have all three Core Web Vitals in the green, underscoring the challenge of maintaining optimal web performance consistently.
Here are the e-commerce rankings, for which web performance is a business and SEO issue.
E-commerce : Webperf ranking of the top 30 most visited sites in the United Kingdom
E-commerce: Average of vital core web:
This month’s web performance ranking shows that while many e-commerce platforms maintain good LCP and CLS scores, interaction latency (INP) remains a widespread issue. Only 19% of sites have all Core Web Vitals in the green, and some INP values exceed 1177ms — a real bottleneck for conversions.
✅ 65% of e-commerce websites now have a green CLS, minimizing layout shifts during browsing.
⚠️ But only 26% have a green INP, meaning that interactions — like clicking “Add to cart” or filling a form — are still sluggish on many platforms.
🏆 TOP 3 LEADERS
Aldi stays in 1st place with a solid INP of 135 ms and exceptional stability.
Ikea follows closely, with an INP of 160 ms and a highly optimized LCP of 1319 ms
John Lewis holds 3rd place, delivering consistent speed and a flawless CLS.
🌟 NOTABLE PROGRESSIONS
Aldi stays in 1st place with a solid INP of 135 ms and exceptional stability.
Ikea follows closely, with an INP of 160 ms and a highly optimized LCP of 1319 ms.
John Lewis holds 3rd place, delivering consistent speed and a flawless CLS.
📉 CHALLENGES OBSERVED
- Amazon slips 3 positions, with a modest +20 ms increase in LCP that nonetheless impacts the perception of speed.
- Nike drops 2 spots, with both loading (+78 ms) and interactivity (+21 ms) metrics worsening.
- Next also struggles slightly on INP (+11 ms), which pushes it down 2 positions.
| Website | Ranking | Ranking M-1 | Score | LCP (in ms) | INP (in ms) | CLS |
| Aldi | 1 (0) | 1 | 98 | 1665 | 135 | 0,01 |
| Ikea | 2 (0) | 2 | 98 | 1319 | 160 | 0,02 |
| John Lewis | 3 (0) | 3 | 98 | 1329 | 175 | 0 |
| Asos | 4 (3) | 7 | 97 | 1671 | 197 | 0,01 |
| Temu | 5 (0) | 5 | 96 | 1727 | 189 | 0 |
| Very | 6 (0) | 6 | 96 | 1747 | 204 | 0,02 |
| Amazon | 7 (-3) | 4 | 96 | 1528 | 163 | 0,09 |
| Ebay | 8 (0) | 8 | 96 | 1443 | 222 | 0,01 |
| Marks And Spencer | 9 (0) | 9 | 94 | 1712 | 185 | 0,1 |
| Sports Direct | 10 (0) | 10 | 93 | 1287 | 290 | 0 |
| Wickes | 11 (1) | 12 | 91 | 2147 | 279 | 0,07 |
| River Island | 12 (-1) | 11 | 91 | 1407 | 336 | 0 |
| Pretty Little Thing | 13 (1) | 14 | 89 | 2157 | 346 | 0,01 |
| DIY | 14 (-1) | 13 | 89 | 2138 | 324 | 0,06 |
| Matalan | 15 (0) | 15 | 89 | 1543 | 396 | 0 |
| Screwfix | 16 (0) | 16 | 86 | 2348 | 339 | 0,02 |
| JD Sports | 17 (2) | 19 | 86 | 1728 | 238 | 0,19 |
| Apple | 18 (-1) | 17 | 86 | 3208 | 181 | 0,03 |
| H&M | 19 (3) | 22 | 85 | 1383 | 368 | 0,13 |
| Nike | 20 (-2) | 18 | 84 | 2817 | 276 | 0,1 |
| Halfords | 21 (-1) | 20 | 83 | 2454 | 296 | 0,15 |
| Tesco | 22 (2) | 24 | 82 | 2508 | 395 | 0,06 |
| Next | 23 (-2) | 21 | 80 | 2087 | 576 | 0,04 |
| Shein | 24 (-1) | 23 | 79 | 2547 | 429 | 0,09 |
| Vinted | 25 (0) | 25 | 67 | 2799 | 269 | 0,48 |
| Samsung | 26 (0) | 26 | 59 | 3669 | 411 | 0,19 |
| EE | 27 (0) | 27 | 48 | 4656 | 245 | 0,41 |
| Uber eats | 28 (0) | 28 | 46 | 4524 | 1177 | 0,09 |
| Boots | 29 (0) | 29 | 43 | 3995 | 538 | 0,5 |
| Iceland | 30 (0) | 30 | 23 | 5227 | 838 | 1 |
Media : Webperf ranking of the top 20 most visited sites in the United Kingdom
Media : Average of vital core web
This month’s media rankings saw significant shifts, with changes at the podium and notable progressions across the board.
🏆 TOP 3 LEADERS
The Guardian remains 1st, with an INP of 120 ms and solid overall consistency.
BBC holds steady in 2nd with a fast and stable interface (INP 146 ms, perfect CLS).
- Sky Sports rounds out the podium, maintaining 3rd, thanks to an INP of 140 ms and a near-perfect CLS.
Several brands climbed the ranks this month through targeted performance gains:
The Times jumps 8 places to #8 after reducing LCP by 106 ms and INP by 36 ms, delivering a snappier experience.
Gb News gains 4 positions thanks to improvements across the board: –101 ms on LCP, –68 ms on INP.
Wales Online climbs 3 spots after shaving 102 ms off LCP and 62 ms off INP, now offering a smoother browsing experience.
📉 CHALLENGES OBSERVED :
Some sites faced small setbacks that impacted their user experience:
- Manchester Evening News slips 3 spots due to a +17 ms increase in INP, signaling slower interactions.
- London South East sees mild regressions across all metrics.
- Hello Magazine, NY Times, and Daily Star all experienced notable LCP increases, affecting the perceived speed of content loading.
| Website | Ranking | Ranking M-1 | Score | LCP (in ms) | INP (in ms) | CLS |
| The Guardian | 1 (0) | 1 | 99 | 910 | 120 | 0,06 |
| BBC | 2 (0) | 2 | 99 | 920 | 146 | 0 |
| Sky Sports | 3 (0) | 3 | 98 | 1736 | 140 | 0,01 |
| Metro | 4 (1) | 5 | 97 | 1517 | 180 | 0 |
| Telegraph | 5 (-1) | 4 | 97 | 1706 | 141 | 0,07 |
| The Sun | 6 (1) | 7 | 96 | 1527 | 207 | 0,01 |
| Yahoo | 7 (-1) | 6 | 96 | 1709 | 191 | 0,04 |
| The times | 8 (8) | 16 | 96 | 2188 | 161 | 0 |
| Financial Times | 9 (-1) | 8 | 96 | 2098 | 95 | 0,08 |
| Independent | 10 (0) | 10 | 96 | 1299 | 220 | 0,06 |
| London South East | 11 (-2) | 9 | 96 | 1821 | 197 | 0,07 |
| The Scottish Sun | 12 (0) | 12 | 95 | 1537 | 231 | 0,01 |
| Hello magazine | 13 (-2) | 11 | 95 | 1695 | 184 | 0,09 |
| Daily Mail | 14 (-1) | 13 | 95 | 1581 | 247 | 0,02 |
| Standard | 15 (0) | 15 | 94 | 1399 | 266 | 0,05 |
| Ny times | 16 (-2) | 14 | 94 | 2184 | 221 | 0,05 |
| Wales Online | 17 (3) | 20 | 94 | 1990 | 235 | 0,06 |
| Racing Post | 18 (-1) | 17 | 93 | 1920 | 224 | 0,09 |
| Birmingham Live | 19 (-1) | 18 | 91 | 2052 | 299 | 0,03 |
| Daily Record | 20 (1) | 21 | 91 | 2088 | 294 | 0,05 |
| Daily Star | 21 (-2) | 19 | 91 | 2122 | 289 | 0,05 |
| Express | 22 (0) | 22 | 90 | 1887 | 339 | 0,03 |
| Good Read | 23 (0) | 23 | 89 | 2432 | 158 | 0,12 |
| Gb News | 24 (4) | 28 | 88 | 2525 | 312 | 0,06 |
| Sporting Life | 25 (1) | 26 | 87 | 2831 | 279 | 0,03 |
| Echo | 26 (-1) | 25 | 87 | 2455 | 311 | 0,05 |
| Manchester evening News | 27 (-3) | 24 | 86 | 2356 | 329 | 0,07 |
| News Now | 28 (-1) | 27 | 84 | 2306 | 448 | 0,01 |
| Premier League | 29 (0) | 29 | 82 | 3049 | 178 | 0,16 |
| Live Score | 30 (0) | 30 | 47 | 4355 | 640 | 0,25 |
Media websites continue to perform well on loading (LCP) and stability (CLS) — with 87%- and 90% of the sector meeting the thresholds, respectively.
However, the real challenge remains interactions (INP), where only 40% of media sites are in the green. This means that while pages load quickly and remain visually stable, user interactions like clicks and taps are often delayed — a critical issue for high-engagement platforms.
Only 33% of the media websites analyzed achieved all three Core Web Vitals in the green, showing that even in mature sectors, continuous optimization is essential to meet the demands of today’s users.
Finally, here are the top travel websites.
Travel : Webperf ranking of the top 20 most visited sites in the United Kingdom
Travel : Average of vital core web
🏆 TOP 3 LEADERS
The best-performing travel websites this month have nailed the fundamentals of user experience: fast loading, responsive interaction, and visual stability.
Love Holidays holds the #1 spot with an impressive INP of 158 ms and perfect CLS (0).
Transport for London ranks #2 with excellent interactivity (INP 121 ms).
Pitchup maintains its position with a good LCP (1343 ms).
🌟 NOTABLE PROGRESSIONS
Several travel websites made clear progress this month:
- Trip gains 1 rank thanks to a –186 ms drop in LCP and –18 ms improvement in INP, speeding up both loading and interaction.
- Vrbo continues its improvements with –70 ms on LCP and –16 ms on INP.
- TUI stands out with –239 ms faster loading, –31 ms better INP, and a clear drop in CLS (–0.04).
- Agoda shows a –30 ms improvement in LCP, boosting its loading performance.
📉 CHALLENGES OBSERVED
A few sites saw a decline in experience metrics:
- Cottages drops 3 positions due to a +388 ms increase in LCP and +127 ms in INP, hurting both loading and interaction.
- Premier Inn also slips with a +44 ms rise in LCP, slowing down first impressions.
| Website | Ranking | Ranking M-1 | Score | LCP (in ms) | INP (in ms) | CLS |
| Love Holidays | 1 (0) | 1 | 98 | 1441 | 158 | 0 |
| Transport For London | 2 (0) | 2 | 97 | 1527 | 121 | 0,1 |
| Pitchup | 3 (0) | 3 | 96 | 1343 | 203 | 0,07 |
| Trip Advisor | 4 (0) | 4 | 93 | 1903 | 189 | 0,11 |
| Skyes Cottages | 5 (0) | 5 | 92 | 2376 | 201 | 0,02 |
| Rome 2 Rio | 6 (0) | 6 | 91 | 2736 | 204 | 0,02 |
| Ryanair | 7 (0) | 7 | 90 | 2716 | 185 | 0,09 |
| Trip | 8 (1) | 9 | 90 | 2469 | 221 | 0,09 |
| Agoda | 9 (1) | 10 | 87 | 1117 | 439 | 0,06 |
| Vrbo | 10 (1) | 11 | 86 | 2669 | 272 | 0,08 |
| Cottages | 11 (-3) | 8 | 83 | 1861 | 511 | 0,06 |
| National Express | 12 (0) | 12 | 82 | 1740 | 326 | 0,2 |
| Booking | 13 (0) | 13 | 81 | 2586 | 420 | 0 |
| Uber | 14 (0) | 14 | 79 | 2459 | 531 | 0 |
| Parkdean Resorts | 15 (0) | 15 | 78 | 3128 | 314 | 0,13 |
| Airbnb | 16 (0) | 16 | 74 | 3410 | 342 | 0,11 |
| Jet 2 | 17 (0) | 17 | 73 | 2583 | 676 | 0,07 |
| Hotels.com | 18 (0) | 18 | 72 | 3139 | 504 | 0,1 |
| Po Cruises | 19 (0) | 19 | 71 | 2643 | 248 | 0,41 |
| National Rail | 20 (0) | 20 | 70 | 1987 | 438 | 0,33 |
| Skyscanner | 21 (0) | 21 | 68 | 2965 | 422 | 0,24 |
| Easy Jet | 22 (0) | 22 | 63 | 2554 | 499 | 0,36 |
| Eurostar | 23 (0) | 23 | 61 | 2415 | 738 | 0,29 |
| TUI | 24 (1) | 25 | 60 | 3229 | 314 | 0,54 |
| Premier Inn | 25 (-1) | 24 | 59 | 4055 | 422 | 0,2 |
| The Trainline | 26 (0) | 26 | 55 | 3322 | 493 | 0,32 |
Global insights on Travel Web Performance – May 2025
The travel sector continues to face major challenges when it comes to web performance. While nearly half of the sites offer a visually stable experience, the rest of the Core Web Vitals still lag behind :
🧭 Interactivity (INP)
Only 15% of travel websites meet Google’s INP threshold.
That means most users experience delays when interacting — whether selecting dates, opening dropdowns, or submitting booking forms.
These lags can seriously hurt both user satisfaction and conversion rates.
⏱ Loading Speed (LCP)
Just 44% of travel sites meet the LCP threshold.
Key content still takes too long to load — a major blocker for users comparing destinations or searching for the best deal.
🔒 Page Stability (CLS)
Only 44% of sites deliver a stable layout with minimal visual shifts.
This instability distracts users and creates friction right before they act.
❌ The Verdict
Only 7% of travel websites currently pass all three Core Web Vitals.
This makes travel the lowest-performing vertical in our ranking.
💡 Takeaway: Speed and stability aren’t just nice to have in travel — they’re essential. A fast-loading, smooth, and interactive experience can mean the difference between a completed booking and a lost customer. It’s time for travel brands to put LCP and INP optimization at the top of their roadmap.
In such a competitive market, standing out through your website’s performance is essential. Fast loading times not only improve user experience but also increase conversion rates and generate more revenue. This monthly ranking is a valuable tool to measure and enhance your site’s performance, allowing you to position yourself against competitors and identify areas for improvement.
We encourage all UK e-commerce leaders to invest in optimizing their site speed and to use tools and services like those we offer at Fasterize to stay competitive. Stay tuned for our upcoming editions to see how your site compares and what improvements can be made. For more information and to know how to improve your webperformance, visit our website.
