Website readiness profile · Snapshot 23 October 2026
thetrainline.com
thetrainline.com's public homepage, certificate and DNS checked against 31 practices and compared with 203 Trains & Public Transport sites.
- Readiness index
- 76/100
- Ahead of
- 86%
- Practices observed
- 20/30
- Popularity band
- Top 5K
Trains & Public Transport median 60
of measured Trains & Public Transport sites
1 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: thetrainline.com. Thin bar: Trains & Public Transport peer median.
Enable
85/100
Peers 73
Harden
80/100
Peers 57
Accelerate
65/100
Peers 53
Recover
0/100
Peers 15
Priority fixes for thetrainline.com
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
Modern image formats in use
Observed: The homepage had 15 images and none used WebP or AVIF.
Why it matters: WebP and AVIF are typically much smaller than JPEG or PNG at similar quality, and images are often the heaviest part of a page.
What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
On Cloudflare: Cloudflare Polish can convert images to WebP.
28% of Trains & Public Transport peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 2 · Accelerate
Offscreen images lazy-loaded
Observed: The homepage had 15 images and none used loading="lazy".
What to do: Add loading="lazy" to images below the fold. Do not lazy-load the main hero image, because that delays the largest visible element.
43% of Trains & Public Transport peers do this.
Priority 3 · Enable
Social preview image set
Observed: The homepage had no og:image, so shared links may show without a preview image.
What to do: Add Open Graph tags, including og:image with a 1200 x 630 image.
54% of Trains & Public Transport peers do this.
Priority 4 · Accelerate
HTTP/3 advertised
Observed: The homepage did not advertise HTTP/3 through an Alt-Svc header.
What to do: Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.
On Amazon CloudFront: Select HTTP/3 in the distribution's supported HTTP versions.
28% of Trains & Public Transport peers do this.
What thetrainline.com already does well
Practices fewer than half of Trains & Public Transport peers use.
- DNSSEC signedDNSSEC delegation (DS record) present.13% of peers
- Structured data presentJSON-LD structured data found.33% of peers
- Content Security Policy presentContent-Security-Policy present.34% of peers
What we saw
- Homepage checked
- https://www.thetrainline.com/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Amazon, 197-day validity, expiring 2027-02-20
- CDN or edge
- Amazon CloudFront
- DNS operators
- Cloudflare
- HSTS
- max-age 365 days
- DMARC policy
- p=reject
- Homepage HTML
- 455 KB, gzip
- Images on homepage
- 15 (svg 15)
Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.
Stack and providers
Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.
All 31 checks
Select a gap for the method and fix. How each check works
Not observed 10
Observed 20
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- DNSSEC signed
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- HTTP/2 negotiated
- HTML compressed
- Static files cached for 30 days or more
- No render-blocking scripts in <head>
- XML sitemap discoverable
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Structured data present
- Page language declared
- At most one redirect to the homepage
Not measured 1
- robots.txt published
Own thetrainline.com?
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Live status for this site: Status Is Down: thetrainline.com. This profile covers configuration only.