Lighthouse Mobile
· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.Detailed Report
Audit breakdown by category with detailed findings.
Performance
Insights
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
Performance issues directly impact user engagement and conversion rates.
Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling
Performance issues directly impact user engagement and conversion rates.
3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.
Performance issues directly impact user engagement and conversion rates.
A long cache lifetime can speed up repeat visits to your page. Learn more about caching.
Performance issues directly impact user engagement and conversion rates.
| Request | Cache TTL | Transfer Size |
|---|---|---|
| cdn.optimizely.com/public/4621041136/s/bbcx_prod.js | 120.0 s | 97.3 KiB |
| cdn.tinypass.com/api/tinypass.min.js | 14400.0 s | 131.9 KiB |
| cdn.privacy-mgmt.com/Notice.8f529.js | 3600.0 s | 91.2 KiB |
| ichef.bbc.co.uk/images/ic/raw/p0nc0nkl.jpg?v=4&desktop-default.webp | 86400.0 s | 124.0 KiB |
| emp.bbci.co.uk/emp/bump-4/bump-4.js | 300.0 s | 40.3 KiB |
| cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js | 3600.0 s | 41.9 KiB |
| gn-web-assets.api.bbc.com/ngas/latest/dotcom-bootstrap.js | 360.0 s | 22.3 KiB |
| static.chartbeat.com/js/chartbeat.js | 86400.0 s | 15.9 KiB |
| cdn.privacy-mgmt.com/Notice.30929.css | 3600.0 s | 6.7 KiB |
| uk-script.dotmetrics.net/Scripts/ncs-script.js?v=362 | 0.0 ms | 2.9 KiB |
| nav.files.bbci.co.uk/orbit/2.0.0-502.c3ab836/js/require.min.js | 86400.0 s | 6.9 KiB |
| cdn.privacy-mgmt.com/polyfills.01516.js | 3600.0 s | 2.3 KiB |
| gn-web-assets.api.bbc.com/assets/imgs/BBC_Logo_Black_RGB_64px.png | 0.0 ms | 1.8 KiB |
| /hit.gif?id=13934&url=https%3A%2F%2Fwww.bbc.com%2F&dom=ww... | 86400.0 s | 1.2 KiB |
Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.
Performance issues directly impact user engagement and conversion rates.
Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.
Performance issues directly impact user engagement and conversion rates.
A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.
Performance issues directly impact user engagement and conversion rates.
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
In pictures: Artemis II crew witness 'Earthset' and a solar eclipse div.sc-329e5f2b-3 > div.sc-329e5f2b-4 > div.sc-5340b511-1 > img.sc-5340b511-0 | ichef.bbc.co.uk/images/ic/raw/p0nc0nkl.jpg?v=4&desktop-default.webp | 123.6 KiB | 121.4 KiB |
Iranian workers cleans at the site of Israeli-American strikes that according t… div.sc-d8331fdf-5 > div.sc-d8331fdf-1 > div.sc-5340b511-1 > img.sc-5340b511-0 | /ace/standard/800/cpsprodpb/1fc5/live/f8900750-32a4-11f1-... | 69.7 KiB | 22.1 KiB |
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
Performance issues directly impact user engagement and conversion rates.
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Lists the toplevel main thread tasks that executed during page load.
Performance issues directly impact user engagement and conversion rates.
Collection of useful page vitals.
Performance issues directly impact user engagement and conversion rates.
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| www.bbc.co.uk/ | 7.0 s |
| www.bbc.com/ | 0.0 ms |
These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS
Performance issues directly impact user engagement and conversion rates.
| Element | Layout shift score |
|---|---|
Download the BBC app
Click here to download the BBC app for Apple and Android … div.sc-137e23a3-2 > div.sc-c64a065b-0 > div.sc-c64a065b-1 > div.sc-c64a065b-2 | 0.710 |
Download the BBC app
Click here to download the BBC app for Apple and Android … div.sc-137e23a3-2 > div.sc-c64a065b-0 > div.sc-c64a065b-1 > div.sc-c64a065b-2 | 0.054 |
Download the BBC app
Click here to download the BBC app for Apple and Android … div.sc-137e23a3-2 > div.sc-c64a065b-0 > div.sc-c64a065b-1 > div.sc-c64a065b-2 | 0.038 |
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.
Performance issues directly impact user engagement and conversion rates.
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.
Performance issues directly impact user engagement and conversion rates.
Diagnostics
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.
Performance issues directly impact user engagement and conversion rates.
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work
Performance issues directly impact user engagement and conversion rates.
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay. Learn how to avoid long main-thread tasks
Performance issues directly impact user engagement and conversion rates.
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| static.files.bbci.co.uk/core/bundle-vendor-optimizely.59247a9d8bfc766bfe78.js | 48.1 KiB | 4.9 KiB |
| static.files.bbci.co.uk/core/bundle-component-promo.2eef2925e862b0780cae.js | 4.7 KiB | 4.7 KiB |
| /core/website/assets/static/scripts/riddle/riddle.b586b30... | 6.2 KiB | 3.7 KiB |
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| static.files.bbci.co.uk/core/bundle-component-tabs.58a9622d709c78b1f52d.js | 398.1 KiB | 200.6 KiB |
| static.files.bbci.co.uk/core/bundle-product-navigation.f477a218b62f9ed3ad34.js | 224.5 KiB | 172.6 KiB |
| static.files.bbci.co.uk/core/bundle-component-rich-text.ded60a5a321c891c93b7.js | 165.1 KiB | 80.4 KiB |
| /core/bundle-component-portrait-video-modal.2cdc2909097fd... | 135.9 KiB | 73.8 KiB |
| static.files.bbci.co.uk/core/bundle-pwa.90632e97690d8337170a.js | 64.0 KiB | 57.3 KiB |
| static.files.bbci.co.uk/core/bundle-component-image.b932d7ef5f215dc3f07c.js | 68.6 KiB | 49.8 KiB |
| static.files.bbci.co.uk/core/bundle-framework.fa8250dbab749ab46b0a.js | 75.3 KiB | 30.6 KiB |
| /core/bundle-portrait-video-experience.d545d11237dca3a928... | 55.9 KiB | 25.1 KiB |
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| .gUePlo { width: 100%; object-fit: contain; position: absolute; } … | 14.5 KiB | 2.1 KiB |
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
Performance issues directly impact user engagement and conversion rates.
More information about the performance of your application. These numbers don't directly affect the Performance score.
Accessibility
These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.
Names and labels
When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.sc-643c51a4-1 > div.sc-643c51a4-6 > div.sc-5248fb9c-9 > button.sc-5248fb9c-0 div.sc-643c51a4-1 > div.sc-643c51a4-6 > div.sc-5248fb9c-9 > button.sc-5248fb9c-0 |
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Contrast
Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Artemis II's historic lunar flyby... in 90 seconds div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
The four astronauts in the Orion spacecraft set a new record for distance trave… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
US & Canada div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > div.sc-1907e52a-0 > span.sc-1907e52a-2 |
What do people think of Kanye West being blocked from entering the UK? div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
This summer's Wireless Festival has been cancelled after headliner Kanye West w… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
The mysterious origins of the temple older than Stonehenge div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
Göbekli Tepe, an 11,500‑year‑old temple, offers clues to humanity's first steps… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
Humans div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > div.sc-1907e52a-0 > span.sc-1907e52a-2 |
Artemis II mission loses contact with Earth for 40 minutes div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
Once contact was regained, astronaut Christina Koch said: "It is so great to he… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
US & Canada div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > div.sc-1907e52a-0 > span.sc-1907e52a-2 |
Emotional crew names Moon crater after commander's late wife div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
Artemis II Commander Reid Wiseman's wife died from cancer in 2020 at age 46. a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
US & Canada div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > div.sc-1907e52a-0 > span.sc-1907e52a-2 |
Moment Artemis II sets record for distance humans have travelled from Earth div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
The crew broke a previous record of 248,655 miles (400,171km) set by the Apollo… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
US & Canada div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > div.sc-1907e52a-0 > span.sc-1907e52a-2 |
Inside the hotel where Agatha Christie wrote a classic div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
The BBC visits the luxury hotel in Istanbul where Agatha Christie wrote Murder … a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
The Travel Show div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > div.sc-1907e52a-0 > span.sc-1907e52a-2 |
'We are at the edge of a battlefield': BBC reports near Strait of Hormuz div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
The BBC's Orla Guerin travels to the edge of the critical waterway that Iran ha… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
Middle East div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > div.sc-1907e52a-0 > span.sc-1907e52a-2 |
US Politics Unspun div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
No noise. No agenda. Just expert analysis of the issues that matter most from A… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
Download the BBC app div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
Click here to download the BBC app for Apple and Android devices. a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
Sign up to World of Business div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
Gain the leading edge with global insights for the boardroom and beyond, in you… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
Register for a BBC account div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
Don't have time to read everything right now? Your BBC account lets you save ar… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
Sign up for the Essential List div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3 |
The week's best stories, handpicked by BBC editors, in your inbox every Tuesday… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4 |
Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
cookies div#bbccookies-prompt > div.orb-banner-content > p > a |
These are opportunities to improve the legibility of your content.
Navigation
Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Iranians form human chains at bridges and power plants div > a.sc-8a623a54-0 > div.sc-47f19540-0 > h4.sc-47f19540-1 |
Why Real Madrid tie could make or break Kane's Ballon d'Or hopes div > a.sc-8a623a54-0 > div.sc-47f19540-0 > h4.sc-47f19540-1 |
These are opportunities to improve keyboard navigation in your application.
Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
The Global Story
The medications that can trigger sex and gambling addictions div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
Global News Podcast
Artemis II astronauts fly around the Moon div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
Global News Podcast
Trump warns Iran 'whole civilisation will die tonight' div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
Outlook
I found the singer the world forgot div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
Business Daily
Headspace CEO on the use of AI in tackling burnout div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
Witness History
Marcel Duchamp and the urinal that changed art div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
The Documentary Podcast
Albania: Land, money and the sea div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
Global News Podcast
Intelligence chief of Iranian Revolutionary Guard killed div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
Outlook
The addict turned priest who fought the 'war on drugs' div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
The Global Story
Why Hungary’s chaotic election matters to Trump div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
BBC Women's Football Weekly
Extra: Scotland head coach Mel Andreatta with Jen! div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
More than the Score
Paris-Roubaix: cycling’s ‘hell of the north’ div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
Football Daily
MNC: Arsenal's slump and can Slot turn Liverpool around? div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
Rugby Union Weekly
Quarter-finals, TMO controversy & rugby's GOAT div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
BBC Women's Football Weekly
Extra: The WSL 2 & race for promotion div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
More than the Score
How do you teach the World's Strongest Man to dance? div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
The Wayne Rooney Show
Wayne Rooney Reveals His Top 5 Greatest Sports Stars Ever div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
Football Daily
FA Cup Review: Shocks, thrillers and hammerings div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0 |
Best Practices
SEO
These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.