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Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

40

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

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

Why this matters

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.

Why this matters

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
static.files.bbci.co.uk/fonts/reith/2.512/BBCReithSans_W_Bd.woff230 ms
static.files.bbci.co.uk/fonts/reith/2.512/BBCReithSerif_W_Md.woff230 ms
s0.2mdn.net/sadbundle/1969024869070989257/fonts/hpe_graphik_300_normal.ttf30 ms
static.files.bbci.co.uk/fonts/reith/2.512/BBCReithSerif_W_Rg.woff225 ms
static.files.bbci.co.uk/fonts/reith/2.512/BBCReithSans_W_ExBd.woff225 ms
s0.2mdn.net/sadbundle/1969024869070989257/fonts/hpe_graphik_500_normal.ttf25 ms
/sadbundle/1969024869070989257/fonts/hpe_graphik_xxconden...25 ms
static.files.bbci.co.uk/fonts/reith/2.512/BBCReithSans_W_Rg.woff220 ms
static.files.bbci.co.uk/fonts/reith/2.512/BBCReithSans_W_Md.woff210 ms

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:7.977 source:map[column:126306 line:1 type:source-location url:https://cdn.tinypass.com/api/tinypass.min.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:1.162 source:map[column:33416 line:0 type:source-location url:https://cdn.tinypass.com/api/tinypass.min.js urlProvider:network]] map[reflowTime:6.166 source:map[column:326247 line:0 type:source-location url:https://cdn.tinypass.com/api/tinypass.min.js urlProvider:network]] map[reflowTime:16.265 source:map[type:text value:[unattributed]]] map[reflowTime:0.294 source:map[column:88249 line:1 type:source-location url:https://pub.doubleverify.com/dvtag/29028254/DV1298722/pub.js urlProvider:network]] map[reflowTime:0.213 source:map[column:57 line:24 type:source-location url:https://static.chartbeat.com/js/chartbeat.js urlProvider:network]] map[reflowTime:0.744 source:map[column:236656 line:18 type:source-location url:https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604100101/pubads_impl.js urlProvider:network]] map[reflowTime:0.443 source:map[column:48559 line:18 type:source-location url:https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604100101/pubads_impl.js urlProvider:network]] map[reflowTime:0.145 source:map[column:123 line:23 type:source-location url:https://static.chartbeat.com/js/chartbeat.js urlProvider:network]] map[reflowTime:6.205 source:map[column:33383 line:0 type:source-location url:https://cdn.tinypass.com/api/tinypass.min.js urlProvider:network]] map[reflowTime:8.696 source:map[column:296418 line:0 type:source-location url:https://cdn.tinypass.com/api/tinypass.min.js urlProvider:network]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Trump's rift with Pope is playing out in public - it's costing him valuable sup… div > a.sc-8a623a54-0 > div.sc-548b08f-1 > div.sc-548b08f-2
/ace/standard/960/cpsprodpb/d547/live/f5a971b0-34df-11f1-...102.9 KiB94.7 KiB
span#7198658129138543481580 > div#google_image_div > a#aw0 > img.img_ad span#7198658129138543481580 > div#google_image_div > a#aw0 > img.img_ad
tpc.googlesyndication.com/simgad/5622582283101038163128.9 KiB89.4 KiB
Iranian women walk past a police officer standing guard on a street, amid a cea… div.sc-225578b-0 > div.sc-d8331fdf-4 > div.sc-d8331fdf-2 > div.sc-d8331fdf-5
/ace/standard/960/cpsprodpb/c435/live/63c69cf0-38db-11f1-...88.6 KiB83.4 KiB
Cargo ships in the Gulf, near the Strait of Hormuz, as seen from northern Ras a… div.sc-329e5f2b-1 > div.sc-329e5f2b-3 > div.sc-329e5f2b-4 > div.sc-5340b511-1
/ace/standard/960/cpsprodpb/f80c/live/f5a34f20-2ea8-11f1-...81.2 KiB73.3 KiB
Business Daily, Business Daily, Iran’s economy: Counting the cost of war a.sc-8a623a54-0 > div.sc-d2483551-0 > div.sc-5340b511-1 > img.sc-5340b511-0
ichef.bbci.co.uk/images/ic/800x450/p0nd4cy4.jpg.webp76.8 KiB67.5 KiB
Photograph of a black macaques taking a selfie (Credit: David Slater/ Caters Ne… div.sc-8a86ca4a-1 > div.sc-8a86ca4a-2 > div.sc-5340b511-1 > img.sc-5340b511-0
ichef.bbci.co.uk/images/ic/800x450/p0ndd5q7.jpg.webp99.1 KiB64.4 KiB
The Documentary Podcast, Surviving my daughter's killing a.sc-8a623a54-0 > div.sc-d2483551-0 > div.sc-5340b511-1 > img.sc-5340b511-0
ichef.bbci.co.uk/images/ic/800x450/p0n1s8rb.jpg.webp68.2 KiB58.8 KiB
/ace/standard/960/cpsprodpb/205f/live/7e2f7c10-37dc-11f1-...50.8 KiB47.7 KiB
Cargo ships in the Gulf, near the Strait of Hormuz, as seen from northern Ras a… div > a.sc-8a623a54-0 > div.sc-329e5f2b-1 > div.sc-329e5f2b-3
/ace/standard/960/cpsprodpb/11ee/live/791b0060-379a-11f1-...49.6 KiB44.8 KiB
Analysis: Under fragile ceasefire, Iranians wonder if US deal can be done The … body > div#__next > div.app > main#bbc-main
/ace/standard/960/cpsprodpb/cfee/live/5a9a2560-3904-11f1-...60.1 KiB44.5 KiB
ichef.bbci.co.uk/images/ic/624xn/p09qmrlz.jpg.webp52.6 KiB44.4 KiB
Cargo ships in the Gulf, near the Strait of Hormuz, as seen from northern Ras a… a.sc-8a623a54-0 > div.sc-329e5f2b-1 > div.sc-329e5f2b-3 > div.sc-329e5f2b-4
/ace/standard/960/cpsprodpb/bcbb/live/83ece930-0db1-11f1-...46.5 KiB42.0 KiB
Analysis: Under fragile ceasefire, Iranians wonder if US deal can be done The … div.sc-82b3c53b-0 > div.sc-225578b-0 > div.sc-d8331fdf-4 > div.sc-d8331fdf-2
/ace/standard/960/cpsprodpb/3a2d/live/08e71260-38ea-11f1-...43.4 KiB40.7 KiB
head > link head > link
/ace/standard/960/cpsprodpb/495f/live/23e2cf10-3911-11f1-...40.5 KiB38.0 KiB
body > iframe body > iframe
/ace/standard/960/cpsprodpb/5066/live/b42183c0-3815-11f1-...40.4 KiB37.9 KiB
Is the US blockade of Iran working? BBC Verify has been looking into whether t… div.sc-225578b-0 > div > a.sc-8a623a54-0 > div.sc-329e5f2b-1
/ace/standard/960/cpsprodpb/f6d9/live/9a1e1650-37d9-11f1-...62.8 KiB36.9 KiB
Witness History, Witness History, The assassination of Thomas Sankara a.sc-8a623a54-0 > div.sc-d2483551-0 > div.sc-5340b511-1 > img.sc-5340b511-0
ichef.bbci.co.uk/images/ic/800x450/p0nb27h8.jpg.webp46.3 KiB36.9 KiB
Analysis: Under fragile ceasefire, Iranians wonder if US deal can be done div.sc-d8331fdf-6 > div > a.sc-8a623a54-0 > div.sc-feaf8701-1
/ace/standard/960/cpsprodpb/54df/live/20eda860-38b8-11f1-...36.0 KiB33.8 KiB
The Documentary Podcast, Pakistan: Hospitals putting children at risk of HIV a.sc-8a623a54-0 > div.sc-d2483551-0 > div.sc-5340b511-1 > img.sc-5340b511-0
ichef.bbci.co.uk/images/ic/800x450/p0nc7sb0.jpg.webp42.8 KiB33.4 KiB
div.sc-329e5f2b-1 > div.sc-329e5f2b-3 > div.sc-329e5f2b-4 > div.sc-3430e63c-0 div.sc-329e5f2b-1 > div.sc-329e5f2b-3 > div.sc-329e5f2b-4 > div.sc-3430e63c-0
/ace/standard/960/cpsprodpb/3e01/live/c67a01f0-bc8d-11ef-...36.9 KiB33.3 KiB
Analysis: Under fragile ceasefire, Iranians wonder if US deal can be done The … div.sc-cd6075cf-0 > div.sc-82b3c53b-0 > div.sc-225578b-0 > div.sc-d8331fdf-4
/ace/standard/960/cpsprodpb/a128/live/ee5bcf20-38e0-11f1-...27.1 KiB25.4 KiB
Trump's rift with Pope is playing out in public - it's costing him valuable sup… div.sc-225578b-0 > div > a.sc-8a623a54-0 > div.sc-548b08f-1
/ace/standard/960/cpsprodpb/36c5/live/6e6dbf30-34e4-11f1-...28.2 KiB25.4 KiB
Business Daily, Business Daily, Reinventing Kodak a.sc-8a623a54-0 > div.sc-d2483551-0 > div.sc-5340b511-1 > img.sc-5340b511-0
ichef.bbci.co.uk/images/ic/800x450/p0nd8blx.jpg.webp34.8 KiB25.4 KiB
Iranian women walk past a police officer standing guard on a street, amid a cea… div.sc-d8331fdf-2 > div.sc-d8331fdf-5 > div.sc-d8331fdf-1 > div.sc-5340b511-1
/ace/standard/960/cpsprodpb/61cb/live/e212bcd0-38de-11f1-...27.0 KiB25.4 KiB
Americast, Americast, Has Trump given up on the midterms? a.sc-8a623a54-0 > div.sc-d2483551-0 > div.sc-5340b511-1 > img.sc-5340b511-0
ichef.bbci.co.uk/images/ic/800x450/p0j72y80.jpg.webp29.5 KiB21.1 KiB
/ace/standard/624/cpsprodpb/69e0/live/33a283d0-390e-11f1-...24.2 KiB20.7 KiB
Witness History, Witness History, Roddy Doyle: Paddy Clarke Ha Ha Ha a.sc-8a623a54-0 > div.sc-d2483551-0 > div.sc-5340b511-1 > img.sc-5340b511-0
ichef.bbci.co.uk/images/ic/800x450/p0n7w1vm.jpg.webp28.7 KiB20.5 KiB
body > iframe#gptm-dotcom-slot-interstitial body > iframe#gptm-dotcom-slot-interstitial
/ace/standard/624/cpsprodpb/1386/live/a6d7ac90-38be-11f1-...26.3 KiB20.2 KiB
Subscribe Sign In header#bbc-header > div.sc-643c51a4-1 > div.sc-643c51a4-6 > div.sc-5248fb9c-8
/ace/standard/624/cpsprodpb/6abd/live/1a234b70-38db-11f1-...23.5 KiB20.1 KiB
Trump's rift with Pope is playing out in public - it's costing him valuable sup… section.sc-9cd5bb24-0 > div.sc-cd6075cf-0 > div.sc-82b3c53b-0 > div.sc-cd6075cf-0
/ace/standard/624/cpsprodpb/0d5b/live/aaed77c0-3912-11f1-...22.1 KiB18.9 KiB
Global News Podcast, Three years of war in Sudan a.sc-8a623a54-0 > div.sc-d2483551-0 > div.sc-5340b511-1 > img.sc-5340b511-0
ichef.bbci.co.uk/images/ic/800x450/p0lqdxrf.jpg.webp26.3 KiB18.8 KiB
body > iframe#google_ads_top_frame body > iframe#google_ads_top_frame
/ace/standard/624/cpsprodpb/21fa/live/c6b6d430-3645-11f1-...23.7 KiB18.2 KiB
/ace/standard/624/cpsprodpb/479e/live/e202db10-34bc-11f1-...21.2 KiB18.2 KiB
The Global Story, The Global Story, Trump v Pope a.sc-8a623a54-0 > div.sc-d2483551-0 > div.sc-5340b511-1 > img.sc-5340b511-0
ichef.bbci.co.uk/images/ic/800x450/p0ndgqd6.jpg.webp25.3 KiB18.1 KiB
Watch Live Subscribe Sign In div#__next > div.app > header#bbc-header > div.sc-643c51a4-1
/ace/standard/624/cpsprodpb/3fc1/live/44170b70-38d0-11f1-...19.0 KiB16.2 KiB
Advertisement div.dotcom-ad-inner > div#dotcom-slot-interstitial > div#google_ads_iframe_/4817/bbccom/home/home/index/interstitial_0__container__ > iframe#google_ads_iframe_/4817/bbccom/home/home/index/interstitial_0
/ace/standard/624/cpsprodpb/681c/live/8a8aa950-373a-11f1-...20.6 KiB15.9 KiB
/ace/standard/624/cpsprodpb/b80a/live/cc534330-38b9-11f1-...18.5 KiB15.9 KiB
/ace/standard/624/cpsprodpb/01fb/live/ad956180-38aa-11f1-...17.8 KiB15.2 KiB
/ace/standard/624/cpsprodpb/36cf/live/c77df520-3900-11f1-...16.5 KiB14.1 KiB
div.sc-329e5f2b-3 > div.sc-329e5f2b-4 > div.sc-3430e63c-0 > div.sc-3430e63c-1 div.sc-329e5f2b-3 > div.sc-329e5f2b-4 > div.sc-3430e63c-0 > div.sc-3430e63c-1
/ace/standard/960/cpsprodpb/949c/live/b5ed0e80-3500-11f1-...22.5 KiB13.2 KiB
/ace/standard/960/cpsprodpb/4341/live/39968530-f885-11f0-...13.9 KiB12.5 KiB
/ace/standard/624/cpsprodpb/5ede/live/afdd78f0-38fb-11f1-...14.6 KiB12.5 KiB
Sign In div > a.sc-8a623a54-0 > button.sc-d2a91acf-2 > span.sc-d2a91acf-1
/ace/standard/624/cpsprodpb/8f60/live/b48b39d0-390c-11f1-...14.6 KiB12.5 KiB

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.
description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
ichef.bbci.co.uk/images/ic/raw/p0m5nfwj.jpg86400.0 s783.7 KiB
cdn.permutive.com/e488cdb0-e7cb-4d91-9648-60d437d8e491-web.js900.0 s155.3 KiB
prebid.the-ozone-project.com/hw2/builds/ozwrap_pbjs.js14400.0 s187.4 KiB
/scripts/64ca3dfd44dd68a629e2e51a27e7ccd960974b5961e4ca28...3600.0 s123.5 KiB
cdn.optimizely.com/public/4621041136/s/bbcx_prod.js120.0 s98.9 KiB
/scripts/727d9b43a076aa925788e8b215b1d39a710cbe7ace5268ab...3600.0 s116.0 KiB
cdn.tinypass.com/api/tinypass.min.js14400.0 s132.3 KiB
buy-eu.piano.io/widget/dist/checkout/css/checkout.bundle.1.1.css14400.0 s101.9 KiB
browser.covatic.io/sdk/v1/latest.js0.0 ms66.0 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js3600.0 s73.1 KiB
ichef.bbci.co.uk/images/ic/800x450/p0ndd5q7.jpg.webp86400.0 s99.5 KiB
emp.bbci.co.uk/emp/bump-4/bump-4.js300.0 s40.3 KiB
cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js3600.0 s42.5 KiB
ichef.bbci.co.uk/images/ic/800x450/p0nd4cy4.jpg.webp86400.0 s77.2 KiB
cdn.cxense.com/cx.js3600.0 s38.1 KiB
cdn.cxense.com/cx.js3600.0 s38.1 KiB
pub.doubleverify.com/dvtag/29028254/DV1298722/pub.js900.0 s33.6 KiB
uk-script.dotmetrics.net/Scripts/script.js?v=3620.0 ms28.5 KiB
gn-web-assets.api.bbc.com/ngas/latest/dotcom-ads.js360.0 s29.9 KiB
ichef.bbci.co.uk/images/ic/800x450/p0n1s8rb.jpg.webp86400.0 s68.6 KiB
gn-web-assets.api.bbc.com/ngas/latest/dotcom-bootstrap.js360.0 s22.3 KiB
ichef.bbci.co.uk/images/ic/624xn/p09qmrlz.jpg.webp86400.0 s52.9 KiB
ichef.bbci.co.uk/images/ic/800x450/p0nb27h8.jpg.webp86400.0 s46.6 KiB
ichef.bbci.co.uk/images/ic/800x450/p0nc7sb0.jpg.webp86400.0 s43.1 KiB
s0.2mdn.net/879366/express_html_inpage_rendering_lib_200_287.js86400.0 s40.9 KiB
ichef.bbci.co.uk/images/ic/800x450/p0nd8blx.jpg.webp86400.0 s35.1 KiB
/_sam/H4sIAAAAAAAA_62YS4_bOAyA_1BnjGYve20zu9MCWyBo2l4XtEQ...603779.0 s127.0 KiB
gn-web-assets.api.bbc.com/ngas/latest/dotcom-analytics.js360.0 s13.0 KiB
ichef.bbci.co.uk/images/ic/800x450/p0j72y80.jpg.webp86400.0 s29.8 KiB
ichef.bbci.co.uk/images/ic/800x450/p0ndc93k.jpg.webp86400.0 s29.8 KiB
ep2.adtrafficquality.google/sodar/VFc2VJAc.js3000.0 s14.1 KiB
ichef.bbci.co.uk/images/ic/800x450/p0n7w1vm.jpg.webp86400.0 s29.0 KiB
ichef.bbci.co.uk/images/ic/800x450/p0lqdxrf.jpg.webp86400.0 s26.6 KiB
buy-eu.piano.io/widget/dist/checkout/css/img/Loader.gif14400.0 s15.2 KiB
ichef.bbci.co.uk/images/ic/800x450/p0ndgqd6.jpg.webp86400.0 s25.7 KiB
fw.adsafeprotected.com/rjss/st/2806022/92596160/skeleton.js?bidurl=604800.0 s92.0 KiB
cdn.undertone.com/js/ajs.js0.0 ms8.4 KiB
gn-web-assets.api.bbc.com/ngas/latest/dotcom-preroll.js360.0 s6.7 KiB
static.chartbeat.com/js/chartbeat.js86400.0 s15.9 KiB
prebid.the-ozone-project.com/hw2/OZONEBBC4784/1500000107/current/ozpb.min.js14400.0 s8.3 KiB
/ng/common/i18n/platform-translation-map_en_US.js?version...86400.0 s14.0 KiB
cdn.cxense.com/cx.cce.js3600.0 s6.8 KiB
ichef.bbci.co.uk/images/ic/800x450/p0ndc3vx.jpg.webp86400.0 s13.2 KiB
cdn.cxense.com/ari.js3600.0 s6.3 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...86400.0 s10.7 KiB
/checkout/general/loadTranslationMap?aid=7I7hmRshpe&versi...86400.0 s10.6 KiB
/dvtp_src.js900.0 s3.8 KiB
/jsconfig/rjss/st/2806022/92596160/skeleton.js?cbName=__I...0.0 ms3.0 KiB
nav.files.bbci.co.uk/orbit/2.0.0-502.c3ab836/js/require.min.js86400.0 s6.9 KiB
sb.scorecardresearch.com/beacon.js86400.0 s6.7 KiB
sb.scorecardresearch.com/internal-cs/default/beacon.js86400.0 s6.7 KiB
/hw2/OZONEBBC4784/1500000107/current/customized_plugin.js14400.0 s2.3 KiB
prebid.the-ozone-project.com/hw2/OZONEBBC4784/1500000107/current/adUnits.min.js14400.0 s871 B
buy-eu.piano.io/ng/common/pn-spinner/pn-spinner.css14400.0 s715 B
/hit.gif?id=13934&url=https%3A%2F%2Fwww.bbc.com%2F&dom=ww...86400.0 s1.2 KiB
/Repo/rep.gif?ver=3.3.0&typ=pgv&rnd=mo0o0vgu9q34rh84&sid=...0.0 ms413 B
/ul_cb/dsp_match/275?ssp=524&gdpr=%7Bgdpr%7D&gdpr_consent...0.0 ms198 B
/pagead/js/r20260414/r20110914/client/window_focus_fy2021.js1209600.0 s1.6 KiB
/_sam/H4sIAAAAAAAA_62YS4_bOAyA_1BnjGYve20zu9MCWyBo2l4XtEQ...603779.0 s0 B
buy-eu.piano.io/widget/dist/checkout/css/checkout.bundle.1.1.css14400.0 s0 B
/scripts/727d9b43a076aa925788e8b215b1d39a710cbe7ace5268ab...3600.0 s0 B
/pagead/managed/js/activeview/current/ufs_web_display.js3600.0 s0 B
/ng/common/i18n/platform-translation-map_en_US.js?version...86400.0 s0 B
/checkout/general/loadTranslationMap?aid=7I7hmRshpe&versi...86400.0 s0 B
buy-eu.piano.io/widget/dist/checkout/css/img/Loader.gif14400.0 s0 B
/dvtp_src.js900.0 s0 B
/dvtp_src.js900.0 s0 B
buy-eu.piano.io/ng/common/pn-spinner/pn-spinner.css14400.0 s0 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLProtocol
/dvtp_src.jshttp/1.1
/dvtp_src.jshttp/1.1
cdn.doubleverify.com/dv-measurements9748.jshttp/1.1
/dvtp_src.jshttp/1.1

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Collection of useful page vitals.

Why this matters

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 203 ms
URLTime Spent
bbc.co.uk/203 ms
www.bbc.co.uk/0.0 ms

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

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.

Why this matters

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.

Why this matters

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

Why this matters

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

Why this matters

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 130 ms 27.7 KiB
URLTransfer SizeEst Savings
static.files.bbci.co.uk/core/bundle-framework.cbe8d6b81f42de172efb.js45.7 KiB14.7 KiB
static.files.bbci.co.uk/core/bundle-pwa.b14a1b5daaff602fe366.js9.0 KiB9.0 KiB
cdn.undertone.com/js/ajs.js8.0 KiB4.0 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 680.5 KiB
URLTransfer SizeEst Savings
prebid.the-ozone-project.com/hw2/builds/ozwrap_pbjs.js187.3 KiB115.9 KiB
/pagead/managed/js/gpt/m202604100101/pubads_impl.js186.4 KiB85.8 KiB
mybbc-analytics.files.bbci.co.uk/echo-client-js/echo-2.6.0-avi.min.js110.1 KiB53.6 KiB
/core/bundle-component-collection-header.0ed2d2dda8ffe5e2...73.5 KiB52.7 KiB
fw.adsafeprotected.com/rjss/st/2806022/92596160/skeleton.js?bidurl=91.8 KiB37.2 KiB
static.files.bbci.co.uk/core/bundle-default-vendors.daaeb91fc3775b616777.js108.6 KiB36.7 KiB
cdn.doubleverify.com/dv-measurements9748.js94.2 KiB36.5 KiB
cdn.doubleverify.com/dv-measurements9748.js94.2 KiB36.3 KiB
cdn.doubleverify.com/dv-measurements9748.js94.2 KiB35.9 KiB
/core/bundle-component-media-player.f9856147b5cc876db0c3.js47.5 KiB34.7 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js73.1 KiB31.1 KiB
browser.covatic.io/sdk/v1/latest.js65.6 KiB30.5 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js73.1 KiB30.2 KiB
cdn.permutive.com/e488cdb0-e7cb-4d91-9648-60d437d8e491-web.js154.8 KiB21.6 KiB
cdn.cxense.com/cx.js37.5 KiB21.3 KiB
uk-script.dotmetrics.net/Scripts/script.js?v=36228.1 KiB20.5 KiB

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
The page has an unload handler in a sub frame.Actionable

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 2.1 KiB
URLTransfer SizeEst Savings
.gUePlo { width: 100%; object-fit: contain; position: absolute; } …15.0 KiB2.1 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
ichef.bbci.co.uk/images/ic/raw/p0m5nfwj.jpg783.7 KiB
/bbcdotcom/web/20260407-092955-f3cfe0ee04-web-3.0.0-2/_ne...326.7 KiB
prebid.the-ozone-project.com/hw2/builds/ozwrap_pbjs.js187.4 KiB
/pagead/managed/js/gpt/m202604100101/pubads_impl.js186.4 KiB
/mobile/api/v1.0/profile/get_definitions?client_id=646f65...169.7 KiB
cdn.permutive.com/e488cdb0-e7cb-4d91-9648-60d437d8e491-web.js155.3 KiB
cdn.tinypass.com/api/tinypass.min.js132.3 KiB
tpc.googlesyndication.com/simgad/5622582283101038163129.3 KiB
/_sam/H4sIAAAAAAAA_62YS4_bOAyA_1BnjGYve20zu9MCWyBo2l4XtEQ...127.0 KiB
/scripts/64ca3dfd44dd68a629e2e51a27e7ccd960974b5961e4ca28...123.5 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.
Trump and the Tech Titans a.sc-8a623a54-0 > div.sc-acc23e20-0 > div.sc-acc23e20-1 > img.sc-5340b511-0
Trump and the Tech Titans div.sc-acc23e20-2 > div.sc-acc23e20-3 > div.sc-acc23e20-4 > img.sc-5340b511-0

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●LCP request discovery
●Render blocking requests
●Optimize viewport for mobile
●Reduce unused CSS
●User Timing marks and measures 67 user timings
●Network Requests
●Network Round Trip Times 50 ms
●Server Backend Latencies 170 ms
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 20 ms
●Avoid large layout shifts 4 layout shifts found
○INP breakdown
○Avoid non-composited animations
95

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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
From friendship to friction: Inside the growing tensions between Trump and Star… div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3
BBC’s Sarah Smith examines how the Iran war has led to discrepancies between th… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4
Politics div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > div.sc-1907e52a-0 > span.sc-1907e52a-2
Winner of €1m Picasso 'thought it was a scam', organiser tells BBC div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3
One of the charity draw organisers tells BBC Radio 4's Front Row about calling … a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4
Europe div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > div.sc-1907e52a-0 > span.sc-1907e52a-2
Go on patrol with the Canadian Rangers across the frozen Arctic div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3
The BBC rode along with the Rangers on the last leg of a historic trek as they … 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
Dashcam captures meteor soaring through sky div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3
A meteor that experts say was travelling over the North Sea is spotted in North… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4
Northamptonshire div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > div.sc-1907e52a-0 > span.sc-1907e52a-2
Reporter told to pose as gay for asylum claim div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3
A BBC reporter goes undercover and speaks to an adviser encouraging migrants to… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4
Politics div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > div.sc-1907e52a-0 > span.sc-1907e52a-2
Moment gunman tackled by school principal div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3
CCTV footage shows a high school principal charging towards a former student wh… 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
'I can feel the difference' - Americans react to soaring gas prices div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3
President Donald Trump said over the weekend that oil and gas prices "could be … 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
New footage shows moment Orion capsule hatch is opened at sea div.sc-8a86ca4a-3 > div.sc-feaf8701-1 > div.sc-feaf8701-0 > h2.sc-feaf8701-3
Newly released video shows the moment the hatch of Artemis II's Orion capsule i… a.sc-8a623a54-0 > div.sc-8a86ca4a-0 > div.sc-8a86ca4a-3 > p.sc-8a86ca4a-4
Science & Environment 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

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Vote to stop Iran war fails in US Senate again as Democrats vow to keep trying 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
The Global Story Trump v Pope div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
Global News Podcast Three years of war in Sudan div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
Americast Has Trump given up on the midterms? div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
Witness History The assassination of Thomas Sankara div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
The Documentary Podcast Surviving my daughter's killing div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
The Interview John Healey, UK Defence Secretary: Russia’s covert operations div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
Business Daily Reinventing Kodak div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
Witness History Roddy Doyle: Paddy Clarke Ha Ha Ha div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
Business Daily Iran’s economy: Counting the cost of war div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
The Documentary Podcast Pakistan: Hospitals putting children at risk of HIV div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
2025 1 episode TV-G What do the heads of massive tech companies stand to gain … div.sc-3211a4f7-0 > div.sc-225578b-0 > div > a.sc-8a623a54-0
Football Daily UCL Debrief: Arsenal squeeze into the semis as Bayern blast past… div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
Rugby Union Weekly Women's Six Nations: Record crowds & programme gaffs div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
Football Daily 72+ EFL Pod: Fuchs fighting & Leicester’s ‘last chance’ div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
More than the Score Vaibhav Sooryavanshi: The teenager hitting the IPL for six div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
Test Match Special 'I should have died' - James Taylor 10 years on div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
FPL Podcast from BBC Sport Snooker Loopy div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
BBC Women's Football Weekly England beat world champions Spain on Walsh's miles… div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
Football Daily UCL Debrief: Liverpool knocked out & Atleti down Barcelona div.sc-225578b-0 > div.sc-d2483551-4 > div > a.sc-8a623a54-0
○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Document has a `<title>` element
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●Touch targets have sufficient size and spacing.
●Skip links are focusable.
●Document has a main landmark.
●Deprecated ARIA roles were not used
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○No element has a `[tabindex]` value greater than 0
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
77

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Topics
prebid.the-ozone-project.com/hw2/builds/ozwrap_pbjs.js line 94, col 1186
SharedStorage
/pagead/managed/js/activeview/current/ufs_web_display.js line 252, col 234

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
/artifacts/models/646f651b59194d51cf2576ac/ml-classificat...
Failed to load resource: the server responded with a status of 404 ()
www.bbc.com/
Refused to execute script from 'https://secure-us.imrworldwide.com/cgi-bin/m?ci=us-804789h&cg=0&cc=1&si=https://www.bbc.com/&rp=https://www.bbc.co.uk/&ts=compact&rnd=1776294738482&ja=1' because its MIME type ('image/gif') is not executable.
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
100

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.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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