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· 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.

76

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.

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
www.chatfieldbraces.co.uk/assets/img/crossbite-img.webp604800.0 s15.9 MiB
www.chatfieldbraces.co.uk/assets/img/open-bite-img.webp604800.0 s15.9 MiB
www.chatfieldbraces.co.uk/assets/img/underbite-img.webp604800.0 s15.9 MiB
www.chatfieldbraces.co.uk/assets/img/crowded-teeth-img.webp604800.0 s15.9 MiB
www.chatfieldbraces.co.uk/assets/img/gapped-teeth-img.webp604800.0 s15.9 MiB
www.chatfieldbraces.co.uk/assets/img/overbite-img.webp604800.0 s15.9 MiB
connect.facebook.net/en_US/fbevents.js1200.0 s112.2 KiB
www.chatfieldbraces.co.uk/assets/js/jquery.min.js0.0 ms31.2 KiB
/assets/images/platinum-elite-invisalign-provider-2026.webp604800.0 s274.5 KiB
www.chatfieldbraces.co.uk/assets/js/bootstrap.bundle.min.js0.0 ms22.4 KiB
www.chatfieldbraces.co.uk/assets/js/jquery.fancybox.min.js0.0 ms20.6 KiB
/assets/images/orthodontics-invisalign-london-banner.webp604800.0 s159.0 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
www.chatfieldbraces.co.uk/assets/js/nav-tabs.js0.0 ms14.4 KiB
www.chatfieldbraces.co.uk/assets/js/bootstrap.min.js0.0 ms12.3 KiB
www.chatfieldbraces.co.uk/assets/js/scrollbar.js0.0 ms12.1 KiB
www.chatfieldbraces.co.uk/assets/js/owl.carousel.min.js0.0 ms10.9 KiB
www.chatfieldbraces.co.uk/assets/images/benefits-of-invisalign-braces.webp604800.0 s103.8 KiB
www.chatfieldbraces.co.uk/assets/images/invisalign-cost-in-london1.webp604800.0 s74.6 KiB
www.chatfieldbraces.co.uk/assets/images/bkan-thumb.webp604800.0 s72.4 KiB
www.chatfieldbraces.co.uk/assets/images/invisalign-in-uk.webp604800.0 s66.3 KiB
www.chatfieldbraces.co.uk/assets/js/popper.min.js0.0 ms6.5 KiB
www.chatfieldbraces.co.uk/assets/img/case1-before.webp604800.0 s61.2 KiB
/assets/images/our-invisalign-expert-dr-rhona-eskander.webp604800.0 s58.7 KiB
www.chatfieldbraces.co.uk/assets/images/invisalign-treatment-in-london.webp604800.0 s57.4 KiB
www.chatfieldbraces.co.uk/assets/images/invisalign-in-london-youtube-video.webp604800.0 s56.0 KiB
/signals/config/186146930173974?v=2.9.433&r=stable&domain...1200.0 s6.0 KiB
/assets/images/our-invisalign-expert-dr-babak-karimi.webp604800.0 s53.0 KiB
www.chatfieldbraces.co.uk/assets/img/case1-after.webp604800.0 s39.6 KiB
www.chatfieldbraces.co.uk/assets/css/bootstrap.min.css604800.0 s27.7 KiB
www.chatfieldbraces.co.uk/assets/images/platinum-elite-invisalign-provider.webp604800.0 s20.5 KiB
www.chatfieldbraces.co.uk/assets/popup/images/speak-icon.webp604800.0 s19.4 KiB
www.chatfieldbraces.co.uk/assets/popup/images/enquiry-icon.webp604800.0 s18.8 KiB
www.chatfieldbraces.co.uk/assets/popup/images/book-now-icon.webp604800.0 s15.9 KiB
www.chatfieldbraces.co.uk/assets/js/mobileMenu.js0.0 ms1.4 KiB
www.chatfieldbraces.co.uk/assets/images/book-an-appointment-bg.webp604800.0 s12.2 KiB
www.chatfieldbraces.co.uk/assets/js/jquery.twentytwenty.js0.0 ms1.1 KiB
www.chatfieldbraces.co.uk/assets/js/script-2.js0.0 ms918 B
www.chatfieldbraces.co.uk/assets/css/style.css?v=12.2604800.0 s8.8 KiB
www.chatfieldbraces.co.uk/assets/images/chatfield-dental-braces-logo.webp604800.0 s7.4 KiB
www.chatfieldbraces.co.uk/assets/images/general-dental-council-logo.webp604800.0 s6.7 KiB
www.chatfieldbraces.co.uk/assets/images/care-quality-commission-logo.webp604800.0 s5.0 KiB
www.chatfieldbraces.co.uk/assets/images/we-are-a-diamond-logo.webp604800.0 s4.5 KiB
www.chatfieldbraces.co.uk/assets/css/scrollbar.css604800.0 s3.8 KiB
www.chatfieldbraces.co.uk/assets/css/submenu.css604800.0 s3.6 KiB
www.chatfieldbraces.co.uk/assets/css/responsive.css?v=8.3604800.0 s3.2 KiB
www.chatfieldbraces.co.uk/assets/popup/script.js0.0 ms309 B
www.chatfieldbraces.co.uk/assets/css/jquery.fancybox.min.css604800.0 s2.9 KiB
www.chatfieldbraces.co.uk/assets/popup/style.css?v=8.0604800.0 s2.4 KiB
www.chatfieldbraces.co.uk/assets/images/play-youtube-button.webp604800.0 s2.2 KiB
www.gstatic.com/recaptcha/api2/logo_48.png604800.0 s2.2 KiB
www.chatfieldbraces.co.uk/assets/css/navbar.css?v=1.0604800.0 s2.1 KiB
www.chatfieldbraces.co.uk/assets/images/top-phone-icon.webp604800.0 s1.8 KiB
www.chatfieldbraces.co.uk/assets/images/top-clock-icon.webp604800.0 s1.5 KiB
www.chatfieldbraces.co.uk/assets/images/top-email-icon.webp604800.0 s1.3 KiB
www.chatfieldbraces.co.uk/assets/images/w-btn-arrow.webp604800.0 s1.2 KiB
www.chatfieldbraces.co.uk/assets/images/bottom-phone-icon.webp604800.0 s1.2 KiB
www.chatfieldbraces.co.uk/assets/images/right-arrow-icon.webp604800.0 s1.2 KiB
www.chatfieldbraces.co.uk/assets/images/bottom-location-icon.webp604800.0 s1.1 KiB
www.chatfieldbraces.co.uk/assets/images/b-arrow-icon.webp604800.0 s1.1 KiB
www.chatfieldbraces.co.uk/assets/images/bottom-email-icon.webp604800.0 s1.1 KiB
www.chatfieldbraces.co.uk/assets/css/owl.carousel.min.css604800.0 s970 B
www.chatfieldbraces.co.uk/assets/css/mobile-menu.css604800.0 s955 B
www.chatfieldbraces.co.uk/assets/css/twentytwenty.css604800.0 s925 B
www.chatfieldbraces.co.uk/assets/css/slideInUp-nav.css604800.0 s701 B
www.chatfieldbraces.co.uk/assets/css/nav-tabs.css604800.0 s594 B
www.chatfieldbraces.co.uk/assets/css/owl.theme.default.css604800.0 s519 B

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.12248849249737326] map[node:map[boundingRect:map[bottom:146 height:65 left:279 right:1037 top:81 width:758] lhId:page-14-NAV nodeLabel:Home About Us Cosmetic Dentistry General Dentistry Orthodontics Fees Smile … path:1,HTML,1,BODY,1,DIV,6,HEADER,1,DIV,0,DIV,1,NAV selector:header#header > div.container > div.topHeader > nav.main-nav snippet:<nav class="main-nav d-none d-lg-block"> type:node] score:0.05645394842833378 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:51 height:31 left:117 right:148 top:20 width:31] lhId:page-33-IMG nodeLabel:Top phone icon - Chatfield Dental Braces path:1,HTML,1,BODY,1,DIV,6,HEADER,0,DIV,0,DIV,1,DIV,0,DIV,0,A,0,IMG selector:div.d-flex > div.info-item > a > img.me-2 snippet:<img src="https://www.chatfieldbraces.co.uk/assets/images/top-phone-icon.webp" alt="Top phone icon - Chatfield Dental Braces" class="me-2"> type:node]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLCz7Z1xlFd2JQEk.woff2]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLEj6Z1xlFd2JQEk.woff2]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLGT9Z1xlFd2JQEk.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:146 height:65 left:279 right:1037 top:81 width:758] lhId:page-14-NAV nodeLabel:Home About Us Cosmetic Dentistry General Dentistry Orthodontics Fees Smile … path:1,HTML,1,BODY,1,DIV,6,HEADER,1,DIV,0,DIV,1,NAV selector:header#header > div.container > div.topHeader > nav.main-nav snippet:<nav class="main-nav d-none d-lg-block"> type:node] score:0.03817952670336806 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:51 height:31 left:117 right:148 top:20 width:31] lhId:page-33-IMG nodeLabel:Top phone icon - Chatfield Dental Braces path:1,HTML,1,BODY,1,DIV,6,HEADER,0,DIV,0,DIV,1,DIV,0,DIV,0,A,0,IMG selector:div.d-flex > div.info-item > a > img.me-2 snippet:<img src="https://www.chatfieldbraces.co.uk/assets/images/top-phone-icon.webp" alt="Top phone icon - Chatfield Dental Braces" class="me-2"> type:node]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/poppins/v24/pxiEyp8kv8JHgFVrJJfecnFHGPc.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:839 height:345 left:117 right:758 top:494 width:641] lhId:page-26-DIV nodeLabel:Free Fixed Retainer Upper & Lower [worth £450] Free Removable Retainer [worth £… path:1,HTML,1,BODY,2,SECTION,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,2,DIV selector:div.container > div.row > div.col-12 > div.saveup-listing-wrapper snippet:<div class="saveup-listing-wrapper"> type:node] score:0.02632127717946473 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:3658 height:332 left:782 right:1233 top:3325 width:451] lhId:page-5-IMG nodeLabel:Invisalign in London, UK at Chatfield Dental Braces path:1,HTML,1,BODY,7,SECTION,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,IMG selector:div.row > div.col-lg-5 > div.tth-whtng-cost-thumb > img.img-fluid snippet:<img src="https://www.chatfieldbraces.co.uk/assets/images/invisalign-treatment-in-lo…" alt="Invisalign in London, UK at Chatfield Dental Braces" class="img-fluid"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:146 height:65 left:279 right:1037 top:81 width:758] lhId:page-14-NAV nodeLabel:Home About Us Cosmetic Dentistry General Dentistry Orthodontics Fees Smile … path:1,HTML,1,BODY,1,DIV,6,HEADER,1,DIV,0,DIV,1,NAV selector:header#header > div.container > div.topHeader > nav.main-nav snippet:<nav class="main-nav d-none d-lg-block"> type:node] score:0.001312669643638911 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:134 height:40 left:1183 right:1223 top:94 width:40] lhId:page-32-IMG nodeLabel:Right Arrow icon - Chatfield Dental Braces path:1,HTML,1,BODY,1,DIV,6,HEADER,1,DIV,0,DIV,2,DIV,0,DIV,0,A,1,IMG selector:div.tp-pn-rw > div.secbtn > a.btn > img.ml-2 snippet:<img src="https://www.chatfieldbraces.co.uk/assets/images/right-arrow-icon.webp" alt="Right Arrow icon - Chatfield Dental Braces" class="ml-2"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:60 height:50 left:833 right:1038 top:10 width:205] lhId:page-11-A nodeLabel:MAKE AN APPOINTMENT path:1,HTML,1,BODY,1,DIV,6,HEADER,0,DIV,0,DIV,1,DIV,3,A selector:div.top-bar > div.container > div.d-flex > a.appointment-btn snippet:<a href="javascript:void(0);" class="appointment-btn open-popup"> type:node] score:0.0001967837025362636 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:49 height:26 left:287 right:325 top:23 width:38] lhId:page-31-IMG nodeLabel:Top email icon - Chatfield Dental Braces path:1,HTML,1,BODY,1,DIV,6,HEADER,0,DIV,0,DIV,1,DIV,1,DIV,0,A,0,IMG selector:div.d-flex > div.info-item > a > img.me-2 snippet:<img src="https://www.chatfieldbraces.co.uk/assets/images/top-email-icon.webp" alt="Top email icon - Chatfield Dental Braces" class="me-2"> type:node]]] type:subitems]]]

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
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/webfonts/fa-brands-400.woff275 ms
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/webfonts/fa-solid-900.woff270 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff260 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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:35.352 source:map[type:text value:[unattributed]]]]

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
Crowded Teeth Icon div.canhave-invslgn-wrapper > div.canhave-icon-invslgn > div.canhave-icon-invslgn-icon > img
www.chatfieldbraces.co.uk/assets/img/crowded-teeth-img.webp15.9 MiB15.9 MiB
Overbite Icon div.canhave-invslgn-wrapper > div.canhave-icon-invslgn > div.canhave-icon-invslgn-icon > img
www.chatfieldbraces.co.uk/assets/img/overbite-img.webp15.9 MiB15.9 MiB
Invisalign Case Before div.twentytwenty-wrapper > div.twentytwenty-wrapper > div.twentytwenty-container > img.img-fluid
www.chatfieldbraces.co.uk/assets/img/case1-before.webp61.2 KiB49.9 KiB
Book an Appointment Image - Chatfield Dental Braces div.row > div.col-lg-6 > div.bkan-thumb > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/bkan-thumb.webp72.4 KiB48.5 KiB
Invisalign deals in London at Chatfield Dental Braces div.row > div.col-lg-6 > div.hwlng-thumb > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/invisalign-in-uk.webp66.3 KiB38.4 KiB
Invisalign in London, UK at Chatfield Dental Braces div.row > div.col-lg-5 > div.tth-whtng-cost-thumb > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/invisalign-treatment-in-london.webp57.4 KiB33.0 KiB
Invisalign Case After div.twentytwenty-wrapper > div.twentytwenty-wrapper > div.twentytwenty-container > img.img-fluid
www.chatfieldbraces.co.uk/assets/img/case1-after.webp39.5 KiB31.1 KiB
Invisalign Treatment at Chatfield Dental Braces YouTube Video Thumbnail div.teamDtls__left > div.teamDtls__img-box > div.teamDtls__img > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/invisalign-in-london-youtube-video.webp55.9 KiB19.2 KiB
Platinum Elite Invisalign Provider Logo div.invisalign-clear-aligner-wrapper > div.invslgn-clralgnr-logo-wrapper > div.invslgn-clralgnr-logo > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/platinum-elite-invisalign-provider.webp20.4 KiB18.3 KiB
Chatfield Dental Braces logo div.container > div.topHeader > a.logo > img
www.chatfieldbraces.co.uk/assets/images/chatfield-dental-braces-logo.webp7.3 KiB5.9 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-10-IMG
nodeLabel: Invisalign in London Banner Image - Chatfield Dental Braces
path: 1,HTML,1,BODY,2,SECTION,0,DIV,0,IMG
selector: body > section.hero > div.hmp-banner > img.img-fluid
snippet: <img src="https://www.chatfieldbraces.co.uk/assets/images/orthodontics-invisalign-lo…" alt="Invisalign in London Banner Image - Chatfield Dental Braces" class="img-fluid">

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.

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
value: no origins were preconnected
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

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
www.chatfieldbraces.co.uk/assets/css/twentytwenty.css925 B
www.chatfieldbraces.co.uk/assets/css/navbar.css?v=1.02.1 KiB
/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,...1.0 KiB326 ms
www.chatfieldbraces.co.uk/assets/css/slideInUp-nav.css701 B
www.chatfieldbraces.co.uk/assets/css/scrollbar.css3.8 KiB
www.chatfieldbraces.co.uk/assets/css/bootstrap.min.css27.7 KiB120 ms
www.chatfieldbraces.co.uk/assets/css/responsive.css?v=8.33.2 KiB
www.chatfieldbraces.co.uk/assets/css/style.css?v=12.28.8 KiB
www.chatfieldbraces.co.uk/assets/popup/style.css?v=8.02.4 KiB
www.chatfieldbraces.co.uk/assets/css/submenu.css3.6 KiB
www.chatfieldbraces.co.uk/assets/css/mobile-menu.css955 B
www.chatfieldbraces.co.uk/assets/css/nav-tabs.css594 B
www.chatfieldbraces.co.uk/assets/css/owl.theme.default.css519 B
www.chatfieldbraces.co.uk/assets/css/owl.carousel.min.css970 B
www.chatfieldbraces.co.uk/assets/css/jquery.fancybox.min.css2.9 KiB
fonts.googleapis.com/css?family=Lato:400,700886 B74 ms
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/css/all.min.css22.5 KiB322 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
Home About Us Cosmetic Dentistry General Dentistry Orthodontics Fees Smile … header#header > div.container > div.topHeader > nav.main-nav
0.056
Home About Us Cosmetic Dentistry General Dentistry Orthodontics Fees Smile … header#header > div.container > div.topHeader > nav.main-nav
0.038
Free Fixed Retainer Upper & Lower [worth £450] Free Removable Retainer [worth £… div.container > div.row > div.col-12 > div.saveup-listing-wrapper
0.026
Home About Us Cosmetic Dentistry General Dentistry Orthodontics Fees Smile … header#header > div.container > div.topHeader > nav.main-nav
0.001
MAKE AN APPOINTMENT div.top-bar > div.container > div.d-flex > a.appointment-btn
0.000
Invisalign® & Clear Aligner div.col-12 > div.invisalign-clear-aligner-wrapper > div.invslgn-clralgnr-logo-content > h4
0.000

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

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 120 ms 47.8 KiB
URLTransfer SizeEst Savings
www.chatfieldbraces.co.uk/assets/css/bootstrap.min.css27.7 KiB26.2 KiB
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.1/css/all.min.css21.9 KiB21.6 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: 280 ms 380.9 KiB
URLTransfer SizeEst Savings
www.gstatic.com/recaptcha/releases/NhfdZHzre166o-vFZrWsq3yu/recaptcha__en.js350.4 KiB185.3 KiB
www.googletagmanager.com/gtag/js?id=G-5V49XZQLQF&cx=c&_slc=1190.6 KiB77.5 KiB
www.googletagmanager.com/gtm.js?id=GTM-K75ST3W132.9 KiB67.1 KiB
connect.facebook.net/en_US/fbevents.js112.1 KiB50.9 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
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not 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 2.0 KiB
URLTransfer SizeEst Savings
www.chatfieldbraces.co.uk/assets/css/style.css?v=12.28.8 KiB2.0 KiB

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: 0.0 ms 7.6 KiB
URLTransfer SizeEst Savings
www.chatfieldbraces.co.uk/assets/js/nav-tabs.js14.4 KiB7.6 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
www.chatfieldbraces.co.uk/assets/img/crossbite-img.webp15.9 MiB
www.chatfieldbraces.co.uk/assets/img/open-bite-img.webp15.9 MiB
www.chatfieldbraces.co.uk/assets/img/underbite-img.webp15.9 MiB
www.chatfieldbraces.co.uk/assets/img/crowded-teeth-img.webp15.9 MiB
www.chatfieldbraces.co.uk/assets/img/gapped-teeth-img.webp15.9 MiB
www.chatfieldbraces.co.uk/assets/img/overbite-img.webp15.9 MiB
www.gstatic.com/recaptcha/releases/NhfdZHzre166o-vFZrWsq3yu/recaptcha__en.js350.9 KiB
www.gstatic.com/recaptcha/releases/NhfdZHzre166o-vFZrWsq3yu/recaptcha__en.js350.3 KiB
/assets/images/platinum-elite-invisalign-provider-2026.webp274.5 KiB
www.googletagmanager.com/gtag/js?id=G-5V49XZQLQF&cx=c&_slc=1190.7 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.

URL
Benefits of Invisalign Braces YouTube Video Thumbnail div.container > div.lybs-iframe > div.lybs-iframe-img > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/benefits-of-invisalign-braces.webp
Platinum Elite Provider for Invisalign div.teamDtls__left > div.teamDtls__img-box > div.teamDtls__img > img.img-fluid
/assets/images/platinum-elite-invisalign-provider-2026.webp
Invisalign Treatment at Chatfield Dental Braces YouTube Video Thumbnail div.teamDtls__left > div.teamDtls__img-box > div.teamDtls__img > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/invisalign-in-london-youtube-video.webp
Dr. Rhona Eskander Image - Chatfield Dental Braces div.container > div.row > div.col-md-6 > img.img-fluid
/assets/images/our-invisalign-expert-dr-rhona-eskander.webp
Dr. Babak Karimi Image - Chatfield Dental Braces div.container > div.row > div.col-md-6 > img.img-fluid
/assets/images/our-invisalign-expert-dr-babak-karimi.webp
Book an Appointment Image - Chatfield Dental Braces div.row > div.col-lg-6 > div.bkan-thumb > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/bkan-thumb.webp
Book an Appointment Image - Chatfield Dental Braces div.row > div.col-lg-6 > div.bkan-thumb > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/bkan-thumb.webp
Invisalign deals in London at Chatfield Dental Braces div.row > div.col-lg-6 > div.hwlng-thumb > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/invisalign-in-uk.webp
Invisalign Cost in London, UK div.teamDtls__left > div.teamDtls__img-box > div.teamDtls__img > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/invisalign-cost-in-london1.webp
Invisalign in London, UK at Chatfield Dental Braces div.row > div.col-lg-5 > div.tth-whtng-cost-thumb > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/invisalign-treatment-in-london.webp
Chatfield Dental Braces logo div#mCSB_1_container > div.logo > a.logo > img.mCS_img_loaded
www.chatfieldbraces.co.uk/assets/images/chatfield-dental-braces-logo.webp
Chatfield Dental Braces logo div.container > div.topHeader > a.logo > img
www.chatfieldbraces.co.uk/assets/images/chatfield-dental-braces-logo.webp
General Dental Council logo div.footer-adrs-info > div.ftr-brand-logo > div.ftr-l-logo > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/general-dental-council-logo.webp
Care Quality Commission logo div.footer-adrs-info > div.ftr-brand-logo > div.ftr-l-logo > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/care-quality-commission-logo.webp
We are a diamond logo div.footer-adrs-info > div.ftr-brand-logo > div.ftr-l-logo > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/we-are-a-diamond-logo.webp
div.clearfix > div.cta__contact > i.icon-talk > img div.clearfix > div.cta__contact > i.icon-talk > img
www.chatfieldbraces.co.uk/assets/popup/images/speak-icon.webp
Platinum Elite Invisalign Provider Logo div.invisalign-clear-aligner-wrapper > div.invslgn-clralgnr-logo-wrapper > div.invslgn-clralgnr-logo > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/platinum-elite-invisalign-provider.webp
Overbite Icon div.canhave-invslgn-wrapper > div.canhave-icon-invslgn > div.canhave-icon-invslgn-icon > img
www.chatfieldbraces.co.uk/assets/img/overbite-img.webp
Crossbite Icon div.canhave-invslgn-wrapper > div.canhave-icon-invslgn > div.canhave-icon-invslgn-icon > img
www.chatfieldbraces.co.uk/assets/img/crossbite-img.webp
Open bite Icon div.canhave-invslgn-wrapper > div.canhave-icon-invslgn > div.canhave-icon-invslgn-icon > img
www.chatfieldbraces.co.uk/assets/img/open-bite-img.webp
Crowded Teeth Icon div.canhave-invslgn-wrapper > div.canhave-icon-invslgn > div.canhave-icon-invslgn-icon > img
www.chatfieldbraces.co.uk/assets/img/crowded-teeth-img.webp
Underbite Icon div.canhave-invslgn-wrapper > div.canhave-icon-invslgn > div.canhave-icon-invslgn-icon > img
www.chatfieldbraces.co.uk/assets/img/underbite-img.webp
Gapped teeth Icon div.canhave-invslgn-wrapper > div.canhave-icon-invslgn > div.canhave-icon-invslgn-icon > img
www.chatfieldbraces.co.uk/assets/img/gapped-teeth-img.webp
YouTube video play button - Chatfield Dental Braces div.teamDtls__img > div.play-youtube-button > a > img.w-auto
www.chatfieldbraces.co.uk/assets/images/play-youtube-button.webp
YouTube video play button - Chatfield Dental Braces div.lybs-iframe-img > div.play-youtube-button > a > img.w-auto
www.chatfieldbraces.co.uk/assets/images/play-youtube-button.webp
Bottom phone icon - Chatfield Dental Braces li > div.ftr-cnt-icon > div.ftrcnt-icon > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/bottom-phone-icon.webp
Bottom email icon - Chatfield Dental Braces li > div.ftr-cnt-icon > div.ftrcnt-icon > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/bottom-email-icon.webp
Bottom Location icon - Chatfield Dental Braces li > div.ftr-cnt-icon > div.ftrcnt-icon > img.img-fluid
www.chatfieldbraces.co.uk/assets/images/bottom-location-icon.webp
div.sidebar-mblsec > div.secbtn > a.btn > img.ml-2 div.sidebar-mblsec > div.secbtn > a.btn > img.ml-2
www.chatfieldbraces.co.uk/assets/images/w-btn-arrow.webp
Right Arrow icon - Chatfield Dental Braces div.tp-pn-rw > div.secbtn > a.btn > img.ml-2
www.chatfieldbraces.co.uk/assets/images/right-arrow-icon.webp
Top email icon - Chatfield Dental Braces div.d-flex > div.info-item > a > img.me-2
www.chatfieldbraces.co.uk/assets/images/top-email-icon.webp
Top phone icon - Chatfield Dental Braces div.d-flex > div.info-item > a > img.me-2
www.chatfieldbraces.co.uk/assets/images/top-phone-icon.webp
a > div.book-url > span.gm-icon > img a > div.book-url > span.gm-icon > img
www.chatfieldbraces.co.uk/assets/popup/images/book-now-icon.webp
Top clock icon - Chatfield Dental Braces div.container > div.d-flex > div.info-item > img.me-2
www.chatfieldbraces.co.uk/assets/images/top-clock-icon.webp
div#_cta1 > div.cta__item > span.gm-icon > img div#_cta1 > div.cta__item > span.gm-icon > img
www.chatfieldbraces.co.uk/assets/popup/images/enquiry-icon.webp

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

●Document request latency
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Max Potential First Input Delay 70 ms
●JavaScript execution time 0.5 s
●Minimizes main-thread work 1.6 s
●Avoid long main-thread tasks 2 long tasks found
●Avoid non-composited animations 1 animated element found
●Network Requests
●Network Round Trip Times 30 ms
●Server Backend Latencies 190 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Avoid multiple page redirects
●Initial server response time was short Root document took 150 ms
○INP breakdown
○User Timing marks and measures
77

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
MAKE AN APPOINTMENT div.top-bar > div.container > div.d-flex > a.appointment-btn
BOOK ONLINE div.topHeader > div.tp-pn-rw > div.secbtn > a.btn
Smile Gallery section.smile-gallery-ba > div.container > div.dfltHeader > p.smile-box
Who Can Have Invisalign? section.cab-have-invisalign > div.container > div.dfltHeader > h2
Step by step section.stepblock > div.container > div.dfltHeader > p.smile-box
Visit An Invisalign Provider At The Clinic div.container > div.step-bxrow > div.step-header > h4
Begin The Treatment With Braces div.container > div.step-bxrow > div.step-header > h4
A Routine Checkup From The Dentist div.container > div.step-bxrow > div.step-header > h4
Complete The Treatment By Fitting Retainers div.container > div.step-bxrow > div.step-header > h4
Time Of Treatment section.time-of-treatment > div.container > div.timeof-treatment-wrapper > h2
The treatment time is usually 6 to 22 months, a time that might be more or less… section.time-of-treatment > div.container > div.timeof-treatment-wrapper > p
Your check-up appointments with your Invisalign provider will usually be at 4-6… section.time-of-treatment > div.container > div.timeof-treatment-wrapper > p
Smile Gallery div.container > div.smileGallery-ba-2 > div.dfltHeader > p.smile-box

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Chatfield Braces div.col-md-6 > div.copyright > p.mb-0 > a.ftrcprLink

These are opportunities to improve the legibility of your content.

Names and labels

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.row > div.col-lg-12 > div.google-map > iframe div.row > div.col-lg-12 > div.google-map > iframe

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#mCSB_1 > div#mCSB_1_container > div.logo > a.navbar-brand div#mCSB_1 > div#mCSB_1_container > div.logo > a.navbar-brand
div.sidebar-mblsec > div.tp-phone-row > div.social-icons > a div.sidebar-mblsec > div.tp-phone-row > div.social-icons > a
div.sidebar-mblsec > div.tp-phone-row > div.social-icons > a div.sidebar-mblsec > div.tp-phone-row > div.social-icons > a
div.sidebar-mblsec > div.tp-phone-row > div.social-icons > a div.sidebar-mblsec > div.tp-phone-row > div.social-icons > a
div.sidebar-mblsec > div.tp-phone-row > div.social-icons > a div.sidebar-mblsec > div.tp-phone-row > div.social-icons > a
div.container > div.d-flex > div.social-icons > a div.container > div.d-flex > div.social-icons > a
div.container > div.d-flex > div.social-icons > a div.container > div.d-flex > div.social-icons > a
div.container > div.d-flex > div.social-icons > a div.container > div.d-flex > div.social-icons > a
div.container > div.d-flex > div.social-icons > a div.container > div.d-flex > div.social-icons > a
div.ftr-social > ul.ftrSocial > li > a.ftr-facebook div.ftr-social > ul.ftrSocial > li > a.ftr-facebook
div.ftr-social > ul.ftrSocial > li > a.ftr-twitter div.ftr-social > ul.ftrSocial > li > a.ftr-twitter
div.ftr-social > ul.ftrSocial > li > a.ftr-linkedin div.ftr-social > ul.ftrSocial > li > a.ftr-linkedin
div.ftr-social > ul.ftrSocial > li > a.ftr-linkedin div.ftr-social > ul.ftrSocial > li > a.ftr-linkedin

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.

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
Invisalign Braces Are Comfortable To Wear div.row > div.col-md-6 > div.bnfts-invslgn-braces > h4
Visit An Invisalign Provider At The Clinic div.container > div.step-bxrow > div.step-header > h4

These are opportunities to improve keyboard navigation in your application.

Best practices

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html html

These items highlight common accessibility best practices.

○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-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●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-hidden="true"]` elements do not contain focusable descendents
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`[aria-*]` attributes match their roles
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA attributes are used as specified for the element's role
○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 use only permitted ARIA attributes
○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
○`[aria-*]` attributes have valid values
○`[aria-*]` attributes are valid and not misspelled
○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.
○Skip links are focusable.
○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.
○Elements with visible text labels have matching accessible names.
○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.
73

Best Practices

Trust and Safety

All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being served over HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more about HTTPS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Insecure URLRequest Resolution
fontawesome.io/assets/font-awesome/css/font-awesome.cssBlocked

General

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
www.chatfieldbraces.co.uk/orthodontics/invisalign-london/
Mixed Content: The page at 'https://www.chatfieldbraces.co.uk/orthodontics/invisalign-london/' was loaded over HTTPS, but requested an insecure stylesheet 'http://fontawesome.io/assets/font-awesome/css/font-awesome.css'. This request has been blocked; the content must be served over HTTPS.

Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Issue type
Mixed content
●Avoids deprecated APIs
●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
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
92

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.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
BOOK ONLINE div#mCSB_1_container > div.sidebar-mblsec > div.secbtn > a.btn
MAKE AN APPOINTMENT div.top-bar > div.container > div.d-flex > a.appointment-btn
BOOK ONLINE div.topHeader > div.tp-pn-rw > div.secbtn > a.btn
BOOK NOW div.col-lg-6 > div.bkan-aptmt-cnt > div.look-y-btn > a.book-btn
BOOK NOW div.col-lg-6 > div.bkan-aptmt-cnt > div.look-y-btn > a.book-btn

To appear in search results, crawlers need access to your app.

○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
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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