C — https://www.trainline.com

Site Health

Score: 72 / 100

Based on 8 categories, 0 sections

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

Top Priorities (5)

Content-Security-Policy header is missing

Security › Security Headers

No Content-Security-Policy header found

Security › Content Security Policy

15 button(s) with no accessible text

Accessibility › Link & Button Quality

2 link(s) with no accessible text

Accessibility › Link & Button Quality

Cross-Origin-Embedder-Policy header is missing

Security › Security Headers

Embed this badge

Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fwww.trainline.com)](https://beavercheck.com/results/3c7e00f0-679b-7f0d-b16a-a60ecee6058f)

HTML

<a href="https://beavercheck.com/results/3c7e00f0-679b-7f0d-b16a-a60ecee6058f"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fwww.trainline.com" alt="BeaverCheck Score"></a>

Image URL

https://beavercheck.com/badge?url=https%3A%2F%2Fwww.trainline.com

This badge auto-updates with your latest scan result.

Was this report useful?

Thanks for your feedback!

Press ? for shortcuts

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

Accessibility

Best Practices

SEO

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.89 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

18.04 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

3.86 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.001

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

8.95 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

19.96 s

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.

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

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

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

Request	Cache TTL	Transfer Size
cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js	86400.0 s	128.4 KiB
dd.thetrainline.com/tags.js	3600.0 s	42.7 KiB
cdn.branch.io/branch-latest.min.js	300.0 s	23.5 KiB
widget.trustpilot.com/trustboxes/54ad5defc6454f065c28af8b/main.js	86400.0 s	17.9 KiB
cdn.cookielaw.org/scripttemplates/202601.2.0/otTCF.js	86400.0 s	17.8 KiB
/logos/a2a84c2b-cf30-4041-8d10-5515bb72a9d0/b8cef7dd-2ca6...	86400.0 s	14.6 KiB
cdn.cookielaw.org/scripttemplates/otSDKStub.js	86400.0 s	9.1 KiB
widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js	86400.0 s	8.1 KiB
cdn.cookielaw.org/logos/static/powered_by_logo.svg	86400.0 s	2.6 KiB
widget.trustpilot.com/trustboxes/54ad5defc6454f065c28af8b/main.js	86400.0 s	0 B

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

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.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:0.761 source:map[type:text value:[unattributed]]]]

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]

items: [map[duration:973.8359999961853 label:Time to first byte subpart:timeToFirstByte] map[duration:2407.674000003815 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-DIV

nodeLabel: We and our 119 partners store and/or access information on a device, such as un…

path: 1,HTML,1,BODY,26,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,3,DIV

selector: div.ot-sdk-row > div#onetrust-group-container > div#onetrust-policy > div#onetrust-policy-text

snippet: <div id="onetrust-policy-text">

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.

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

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

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.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Estimated savings: 1.5 s

URL	Time Spent
www.trainline.com/	775 ms
www.thetrainline.com/	761 ms
www.thetrainline.com/en-us	0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Estimated savings: 776 ms

URL	Time Spent
www.thetrainline.com/en-us	876 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.

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.

Estimated savings: 150 ms 70.5 KiB

URL	Transfer Size	Est Savings
www.thetrainline.com/public/hweb/css/Home.316c52549f1b86827c33.css	33.1 KiB	28.2 KiB
	25.7 KiB	21.4 KiB
www.thetrainline.com/public/hweb/css/vendors.4b534df22c53362b537c.css	24.8 KiB	20.9 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.

Estimated savings: 5.0 s 962.2 KiB

URL	Transfer Size	Est Savings
www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs	610.9 KiB	350.3 KiB
www.thetrainline.com/public/hweb/js/vendors.9ac2e1b9cc95010cc332.mjs	645.7 KiB	335.5 KiB
/pagead/managed/js/gpt/m202604060101/pubads_impl.js?cb=31...	182.9 KiB	139.4 KiB
www.googletagmanager.com/gtm.js?id=GTM-NJRBF7N	192.5 KiB	76.0 KiB
cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js	128.2 KiB	61.0 KiB

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.

URL	Total CPU Time	Script Evaluation	Script Parse
www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs	3.6 s	2.2 s	257 ms
www.thetrainline.com/en-us	1.7 s	315 ms	72 ms
Unattributable	922 ms	90 ms	0.0 ms
www.thetrainline.com/public/hweb/js/vendors.9ac2e1b9cc95010cc332.mjs	877 ms	500 ms	311 ms
www.thetrainline.com/public/hweb/js/app.89b9a0d98d3ad67146be.mjs	810 ms	791 ms	18 ms
cdn.cookielaw.org/scripttemplates/202601.2.0/otTCF.js	714 ms	664 ms	8.9 ms
www.googletagmanager.com/gtm.js?id=GTM-NJRBF7N	484 ms	358 ms	95 ms
cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js	483 ms	301 ms	67 ms
dd.thetrainline.com/tags.js	370 ms	314 ms	18 ms
/pagead/managed/js/gpt/m202604060101/pubads_impl.js?cb=31...	249 ms	169 ms	76 ms
js-agent.newrelic.com/nr-spa-1.312.1.min.js	241 ms	193 ms	13 ms
/public/hweb/js/intl-Leisure-locales-en-US-asyncMessages-...	219 ms	202 ms	0.8 ms
securepubads.g.doubleclick.net/tag/js/gpt.js	159 ms	142 ms	16 ms
cdn.cookielaw.org/scripttemplates/otSDKStub.js	149 ms	134 ms	3.8 ms
cdn.branch.io/branch-latest.min.js	65 ms	48 ms	10 ms

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

Category	Time Spent
Script Evaluation	6.6 s
Other	1.8 s
Script Parsing & Compilation	1.0 s
Style & Layout	959 ms
Rendering	527 ms
Parse HTML & CSS	236 ms
Garbage Collection	202 ms

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

Failure reason	Failure 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

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

	URL
ticket `li.vGVGl4mXM1bLiES9JH5x > div.Tz7k7EVAOzoILcOnqgqb > div.J1CXK5Y_oDYlhPWTxkeO > img.ktByu183QUy0kUte53Dw`	static.trainlinecontent.com/content/WEB/images/partnerships/train.svg
bookingDotCom `li.vGVGl4mXM1bLiES9JH5x > a.Tz7k7EVAOzoILcOnqgqb > div.J1CXK5Y_oDYlhPWTxkeO > img.ktByu183QUy0kUte53Dw`	static.trainlinecontent.com/content/WEB/images/partnerships/bed.svg
getYourGuide `li.vGVGl4mXM1bLiES9JH5x > a.Tz7k7EVAOzoILcOnqgqb > div.J1CXK5Y_oDYlhPWTxkeO > img.ktByu183QUy0kUte53Dw`	static.trainlinecontent.com/content/WEB/images/partnerships/castle.svg

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

●Layout shift culprits

●Optimize DOM size

●Font display

●Improve image delivery

●Modern HTTP

●Render blocking requests

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 2,580 KiB

●User Timing marks and measures 15 user timings

●Avoid long main-thread tasks 20 long tasks found

●Avoid non-composited animations 2 animated elements found

●Network Requests

●Network Round Trip Times 70 ms

●Server Backend Latencies 330 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid large layout shifts 15 layout shifts found

○INP breakdown

○LCP request discovery

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.

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.

Failing Elements
Tickets `div.Tz7k7EVAOzoILcOnqgqb > div.PXHplFjoHiTbACoAwlEH > div > h4.K45yGYbSC7MyiA6M9a3V`

These are opportunities to improve keyboard navigation in your application.

Names and labels

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.

Failing Elements
div.vrf33QMko7ORTI93hIAz > div.scoped-app-store-icons > div.app-store-icons > a.app-store-icon `div.vrf33QMko7ORTI93hIAz > div.scoped-app-store-icons > div.app-store-icons > a.app-store-icon`
div.vrf33QMko7ORTI93hIAz > div.scoped-app-store-icons > div.app-store-icons > a.app-store-icon `div.vrf33QMko7ORTI93hIAz > div.scoped-app-store-icons > div.app-store-icons > a.app-store-icon`

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.

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.

Failing Elements
Stays Booking.com `div.LFHk7aeRbwREGGIzsZy6 > div.EYvcisANXjYMsH4CuUY8 > li.vGVGl4mXM1bLiES9JH5x > a.Tz7k7EVAOzoILcOnqgqb`
Attractions GetYourGuide `div.LFHk7aeRbwREGGIzsZy6 > div.EYvcisANXjYMsH4CuUY8 > li.vGVGl4mXM1bLiES9JH5x > a.Tz7k7EVAOzoILcOnqgqb`

○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

●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

●`[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

●Form elements have associated labels

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●`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-hidden="true"]` elements do not contain focusable descendents

●ARIA input fields have accessible names

●Elements use only permitted ARIA attributes

●ARIA toggle fields have accessible names

●Background and foreground colors have a sufficient contrast ratio

●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

●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.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●ARIA IDs are unique

●All heading elements contain content.

●Uses ARIA roles only on compatible elements

○`[accesskey]` values are unique

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with the `role=text` attribute do not have focusable descendents.

○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

○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

○Links are distinguishable without relying on color.

○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>`.

○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.

Best Practices

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

Source	Description
www.thetrainline.com/api/basket?nocreate=1	`Failed to load resource: the server responded with a status of 404 ()`

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

URL	Map URL
www.thetrainline.com/public/hweb/js/vendors.9ac2e1b9cc95010cc332.mjs
www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs
widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js	widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js.map

●Uses HTTPS

●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

●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

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

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.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Link destination	Link Text
www.thetrainline.com/terms/cookies	More information

Format your HTML in a way that enables crawlers to better understand your app’s content.

○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 are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

Best Practices

SEO

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

627 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.08 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

595 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.042

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

3.34 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

4.64 s

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.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

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

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:10.853 source:map[column:181232 line:2 type:source-location url:https://www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs 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:1.358 source:map[column:204502 line:1 type:source-location url:https://www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs urlProvider:network]] map[reflowTime:2.523 source:map[column:106383 line:1 type:source-location url:https://www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs urlProvider:network]] map[reflowTime:4.542 source:map[column:130163 line:1 type:source-location url:https://www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs urlProvider:network]] map[reflowTime:1.623 source:map[column:136168 line:1 type:source-location url:https://www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs urlProvider:network]] map[reflowTime:0.873 source:map[column:204986 line:1 type:source-location url:https://www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs urlProvider:network]] map[reflowTime:3.281 source:map[column:1.218661e+06 line:1 type:source-location url:https://www.thetrainline.com/public/hweb/js/vendors.9ac2e1b9cc95010cc332.mjs urlProvider:network]] map[reflowTime:3.949 source:map[column:1.181959e+06 line:1 type:source-location url:https://www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs urlProvider:network]] map[reflowTime:1.622 source:map[column:61379 line:1 type:source-location url:https://www.thetrainline.com/public/hweb/js/vendors.9ac2e1b9cc95010cc332.mjs urlProvider:network]] map[reflowTime:10.853 source:map[column:162344 line:1 type:source-location url:https://www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs urlProvider:network]] map[reflowTime:1.522 source:map[type:text value:[unattributed]]] map[reflowTime:2.07 source:map[column:2.099194e+06 line:1 type:source-location url:https://www.thetrainline.com/public/hweb/js/vendors.9ac2e1b9cc95010cc332.mjs urlProvider:network]] map[reflowTime:0.292 source:map[column:44658 line:10 type:source-location url:https://securepubads.g.doubleclick.net/tag/js/gpt.js urlProvider:network]]]

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.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.

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

value: No additional origins are good candidates for preconnecting

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

Request	Cache TTL	Transfer Size
cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js	86400.0 s	128.4 KiB
dd.thetrainline.com/tags.js	3600.0 s	42.7 KiB
cdn.branch.io/branch-latest.min.js	300.0 s	23.5 KiB
widget.trustpilot.com/trustboxes/54ad5defc6454f065c28af8b/main.js	86400.0 s	17.9 KiB
cdn.cookielaw.org/scripttemplates/202601.2.0/otTCF.js	86400.0 s	17.8 KiB
/logos/a2a84c2b-cf30-4041-8d10-5515bb72a9d0/b8cef7dd-2ca6...	86400.0 s	14.6 KiB
cdn.cookielaw.org/scripttemplates/otSDKStub.js	86400.0 s	9.1 KiB
widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js	86400.0 s	8.1 KiB
www.thetrainline.com/carrier-content/carriers/thalys/colour/web	86400.0 s	4.8 KiB
www.thetrainline.com/carrier-content/carriers/eurostar/colour/web	86400.0 s	4.1 KiB
cdn.cookielaw.org/logos/static/powered_by_logo.svg	86400.0 s	2.6 KiB
www.thetrainline.com/carrier-content/carriers/tgv_lyria/colour/web	86400.0 s	2.4 KiB
www.thetrainline.com/carrier-content/carriers/renfe/colour/web	86400.0 s	2.1 KiB
www.thetrainline.com/carrier-content/carriers/ntv/colour/web	86400.0 s	1.9 KiB
www.thetrainline.com/carrier-content/carriers/sncf/colour/web	86400.0 s	1.9 KiB
www.thetrainline.com/carrier-content/carriers/ouigo/colour/web	86400.0 s	1.6 KiB
www.thetrainline.com/carrier-content/carriers/trenitalia/colour/web	86400.0 s	1.3 KiB
www.thetrainline.com/carrier-content/carriers/db/colour/web	86400.0 s	1.2 KiB
widget.trustpilot.com/trustboxes/54ad5defc6454f065c28af8b/main.js	86400.0 s	0 B

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

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Estimated savings: 423 ms

URL	Time Spent
www.trainline.com/	209 ms
www.thetrainline.com/	214 ms
www.thetrainline.com/en-us	0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Estimated savings: 648 ms

URL	Time Spent
www.thetrainline.com/en-us	748 ms

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.

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.

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.

Estimated savings: 40 ms 69.6 KiB

URL	Transfer Size	Est Savings
www.thetrainline.com/public/hweb/css/Home.316c52549f1b86827c33.css	33.1 KiB	26.8 KiB
	25.7 KiB	21.6 KiB
www.thetrainline.com/public/hweb/css/vendors.4b534df22c53362b537c.css	24.8 KiB	21.2 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.

Estimated savings: 80 ms 1.0 MiB

URL	Transfer Size	Est Savings
www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs	610.9 KiB	346.2 KiB
www.thetrainline.com/public/hweb/js/vendors.9ac2e1b9cc95010cc332.mjs	645.7 KiB	335.2 KiB
/pagead/managed/js/gpt/m202604020101/pubads_impl.js	182.6 KiB	137.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-NJRBF7N	192.5 KiB	76.0 KiB
accounts.google.com/gsi/client	92.6 KiB	70.0 KiB
cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js	128.2 KiB	61.0 KiB
www.thetrainline.com/public/hweb/js/google-one-tap.f6f095296acd8a81230d.mjs	29.6 KiB	25.0 KiB

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.

URL	Total CPU Time	Script Evaluation	Script Parse
www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs	922 ms	570 ms	67 ms
www.thetrainline.com/en-us	477 ms	97 ms	18 ms
Unattributable	341 ms	20 ms	0.0 ms
www.thetrainline.com/public/hweb/js/vendors.9ac2e1b9cc95010cc332.mjs	225 ms	130 ms	74 ms
www.thetrainline.com/public/hweb/js/app.89b9a0d98d3ad67146be.mjs	200 ms	195 ms	4.7 ms
cdn.cookielaw.org/scripttemplates/202601.2.0/otTCF.js	178 ms	160 ms	2.7 ms
cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js	142 ms	93 ms	18 ms
www.googletagmanager.com/gtm.js?id=GTM-NJRBF7N	132 ms	92 ms	30 ms
dd.thetrainline.com/tags.js	117 ms	101 ms	4.1 ms
/pagead/managed/js/gpt/m202604020101/pubads_impl.js	85 ms	58 ms	20 ms
js-agent.newrelic.com/nr-spa-1.312.1.min.js	67 ms	53 ms	3.3 ms
securepubads.g.doubleclick.net/tag/js/gpt.js	65 ms	45 ms	6.2 ms

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

Category	Time Spent
Script Evaluation	1.8 s
Other	534 ms
Script Parsing & Compilation	273 ms
Style & Layout	264 ms
Rendering	161 ms
Garbage Collection	97 ms
Parse HTML & CSS	59 ms

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

Failure reason	Failure 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

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

URL	Transfer Size
www.thetrainline.com/public/hweb/js/vendors.9ac2e1b9cc95010cc332.mjs	646.7 KiB
www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs	611.4 KiB
www.googletagmanager.com/gtm.js?id=GTM-NJRBF7N	192.8 KiB
/pagead/managed/js/gpt/m202604020101/pubads_impl.js	182.6 KiB
cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js	128.4 KiB
www.thetrainline.com/en-us	117.3 KiB
accounts.google.com/gsi/client	93.3 KiB
cdn.cookielaw.org/vendorlist/iab2V2Data.json	86.4 KiB
/consent/af9905cb-5054-4f35-8eac-90611a62f404/0196ed2b-90...	55.2 KiB
www.thetrainline.com/public/hweb/js/app.89b9a0d98d3ad67146be.mjs	48.1 KiB

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

	URL
Trainline logo `div._1xuxjwvc > a > picture > img`	static.trainlinecontent.com/content/vul/logos/trainline-mint.svg

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

●Layout shift culprits

●Optimize DOM size

●Font display

●Improve image delivery

●LCP breakdown

●Modern HTTP

●Render blocking requests

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●User Timing marks and measures 15 user timings

●Avoid long main-thread tasks 8 long tasks found

●Avoid non-composited animations 4 animated elements found

●Network Requests

●Network Round Trip Times 70 ms

●Server Backend Latencies 400 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid large layout shifts 15 layout shifts found

○INP breakdown

○LCP request discovery

Accessibility

Contrast

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

Failing Elements
Get started `div > p > a > span`
Book. `div._1ghxwjps > div._g1393h > h2.eZMJ2m2yI86EeiadNmqo > span._ryhnfd`

These are opportunities to improve the legibility of your content.

Names and labels

Failing Elements
div.vrf33QMko7ORTI93hIAz > div.scoped-app-store-icons > div.app-store-icons > a.app-store-icon `div.vrf33QMko7ORTI93hIAz > div.scoped-app-store-icons > div.app-store-icons > a.app-store-icon`
div.vrf33QMko7ORTI93hIAz > div.scoped-app-store-icons > div.app-store-icons > a.app-store-icon `div.vrf33QMko7ORTI93hIAz > div.scoped-app-store-icons > div.app-store-icons > a.app-store-icon`

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.

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.

Failing Elements
Cart `div > header.KgN0RfzCJxNXGBsSs1gh > div.keJyFmqmFV8KMC4qK666 > button#bubble-interactive-basket-info`

○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

●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

●`[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

●Form elements have associated labels

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●`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-hidden="true"]` elements do not contain focusable descendents

●ARIA input fields have accessible names

●Elements use only permitted ARIA attributes

●ARIA toggle fields have accessible names

●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

●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.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●All heading elements contain content.

●Uses ARIA roles only on compatible elements

○`[accesskey]` values are unique

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with the `role=text` attribute do not have focusable descendents.

○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

○Links are distinguishable without relying on color.

○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>`.

○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.

Best Practices

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

	URL	Aspect Ratio (Displayed)	Aspect Ratio (Actual)
carrier logo `ul.Y57r7Yh5OCM_qr3cKsIL > li > span.Op12vEqAIiSa6brOdja6 > img`	www.thetrainline.com/carrier-content/carriers/eurostar/colour/web	68 x 38 (1.79)	67 x 19 (3.53)
carrier logo `ul.Y57r7Yh5OCM_qr3cKsIL > li > span.Op12vEqAIiSa6brOdja6 > img`	www.thetrainline.com/carrier-content/carriers/thalys/colour/web	68 x 38 (1.79)	68 x 18 (3.78)
carrier logo `ul.Y57r7Yh5OCM_qr3cKsIL > li > span.Op12vEqAIiSa6brOdja6 > img`	www.thetrainline.com/carrier-content/carriers/ntv/colour/web	68 x 38 (1.79)	64 x 18 (3.56)
carrier logo `ul.Y57r7Yh5OCM_qr3cKsIL > li > span.Op12vEqAIiSa6brOdja6 > img`	www.thetrainline.com/carrier-content/carriers/tgv_lyria/colour/web	68 x 38 (1.79)	50 x 18 (2.78)
carrier logo `ul.Y57r7Yh5OCM_qr3cKsIL > li > span.Op12vEqAIiSa6brOdja6 > img`	www.thetrainline.com/carrier-content/carriers/renfe/colour/web	68 x 38 (1.79)	36 x 18 (2.00)
carrier logo `ul.Y57r7Yh5OCM_qr3cKsIL > li > span.Op12vEqAIiSa6brOdja6 > img`	www.thetrainline.com/carrier-content/carriers/ouigo/colour/web	68 x 38 (1.79)	36 x 18 (2.00)
carrier logo `ul.Y57r7Yh5OCM_qr3cKsIL > li > span.Op12vEqAIiSa6brOdja6 > img`	www.thetrainline.com/carrier-content/carriers/trenitalia/colour/web	68 x 38 (1.79)	24 x 18 (1.33)
carrier logo `ul.Y57r7Yh5OCM_qr3cKsIL > li > span.Op12vEqAIiSa6brOdja6 > img`	www.thetrainline.com/carrier-content/carriers/db/colour/web	68 x 38 (1.79)	22 x 18 (1.22)

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

Source	Description
www.thetrainline.com/en-us line 120, col 9631	`[GSI_LOGGER]: FedCM get() rejects with NetworkError: Error retrieving a token.`
www.thetrainline.com/api/basket?nocreate=1	`Failed to load resource: the server responded with a status of 404 ()`
www.thetrainline.com/en-us	`Not signed in with the identity provider.`

URL	Map URL
www.thetrainline.com/public/hweb/js/vendors.9ac2e1b9cc95010cc332.mjs
www.thetrainline.com/public/hweb/js/Home.15c2810c2fc56a12ed5a.mjs
widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js	widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js.map

●Uses HTTPS

●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

●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

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

SEO

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Link destination	Link Text
www.thetrainline.com/terms/cookies	More information

Format your HTML in a way that enables crawlers to better understand your app’s content.

○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 are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

Browse & Analyze

Learn

Results for https://www.trainline.com

Site Health

Top Priorities (5)

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Navigation

Names and labels

Best Practices

General

SEO

Content Best Practices

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Contrast

Names and labels

Best Practices

User Experience

General

SEO

Content Best Practices

Keyboard Shortcuts