Catalog / centrium.co.uk
70

SEO audit for centrium.co.uk

CENTRIUM  |  HOME

other

Health 70/100 (fair) · 14 pages crawled · generated 2026-08-26

Download Markdown report (feed to ChatGPT / Claude / Cursor)
Screenshot of centrium.co.uk
14
pages crawled
12
indexable pages
0
errors
108
warnings
122
notices
0
orphan pages
0
broken links
Category breakdown
CategoryScoreErrorsWarningsNotices
Duplicate 64 0 17 0
Canonical 74 0 12 0
Headings 74 0 12 0
Meta Description 74 0 12 0
Mobile 74 0 12 0
Performance 74 0 12 36
Security 74 0 12 6
Agent Readiness 79 0 10 7
Content 81 0 9 6
Images 100 0 0 6
Links 100 0 0 11
Robots 100 0 0 1
Sitemap 100 0 0 6
Social 100 0 0 24
Structured Data 100 0 0 12
Titles 100 0 0 6
URL 100 0 0 1
Findings

Warnings (12 rules)

warning Control has no accessible name

Rule agent.control_no_name · Agent Readiness · 10 occurrence(s)

warning Missing canonical tag

Rule canonical.missing · Canonical · 12 occurrence(s)

warning Lorem-ipsum placeholder text in a live page

Rule content.lorem_ipsum · Content · 1 occurrence(s)

warning Thin content (low word count)

Rule content.thin · Content · 8 occurrence(s)

warning Duplicate page content

Rule duplicate.content · Duplicate · 3 occurrence(s)

warning Homepage duplicated across protocol/host variants (no redirect)

Rule duplicate.protocol_host · Duplicate · 3 occurrence(s)

  • https://centrium.co.uk/ — http://centrium.co.uk/ serves the same homepage content with a 200 and no redirect — Google sees a duplicate. Pick one canonical host/scheme and 301-redirect the others.
  • https://centrium.co.uk/ — http://www.centrium.co.uk/ serves the same homepage content with a 200 and no redirect — Google sees a duplicate. Pick one canonical host/scheme and 301-redirect the others.
  • https://centrium.co.uk/ — https://www.centrium.co.uk/ serves the same homepage content with a 200 and no redirect — Google sees a duplicate. Pick one canonical host/scheme and 301-redirect the others.

warning Duplicate <title> across pages

Rule duplicate.title · Duplicate · 11 occurrence(s)

warning Missing <h1>

Rule h1.missing · Headings · 12 occurrence(s)

warning Content-Type header doesn't match the actual content

Rule headers.content_type_mismatch · Security · 12 occurrence(s)

  • http://www.centrium.co.uk/cr.01.html — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".
  • http://www.centrium.co.uk/home_onepage-copy.html — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".
  • http://www.centrium.co.uk/index.html — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".
  • http://www.centrium.co.uk/ls.01.html — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".
  • http://www.centrium.co.uk/projects.html — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".
  • http://www.centrium.co.uk/sw.01.html — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".
  • https://centrium.co.uk/ — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".
  • https://centrium.co.uk/cr.01.html — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".
  • https://centrium.co.uk/index.html — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".
  • https://centrium.co.uk/ls.01.html — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".
  • https://centrium.co.uk/projects.html — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".
  • https://centrium.co.uk/sw.01.html — the Content-Type is "text/html" with no charset — the HTTP charset is authoritative and browsers otherwise guess the encoding, which can garble non-ASCII text (mojibake). Declare it explicitly: "text/html; charset=utf-8".

warning Missing meta description

Rule meta_desc.missing · Meta Description · 12 occurrence(s)

warning Missing viewport meta tag

Rule mobile.viewport_missing · Mobile · 12 occurrence(s)

warning Render-blocking script in <head> (no defer/async)

Rule perf.render_blocking · Performance · 12 occurrence(s)

Notices (18 rules)

notice No llms.txt for AI agents

Rule agent.llms_txt_missing · Agent Readiness · 1 occurrence(s)

  • https://centrium.co.uk/ — no llms.txt found at the site root — add one so AI agents get a curated site summary

notice No main landmark for AI agents

Rule agent.no_main_landmark · Agent Readiness · 6 occurrence(s)

notice Low text-to-HTML ratio

Rule content.low_ratio · Content · 2 occurrence(s)

notice Main text is hard to read (low Flesch Reading Ease)

Rule content.readability_poor · Content · 4 occurrence(s)

  • http://www.centrium.co.uk/home_onepage-copy.html — this page reads as very difficult (Flesch Reading Ease 27, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • http://www.centrium.co.uk/index.html — this page reads as very difficult (Flesch Reading Ease 26, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://centrium.co.uk/ — this page reads as very difficult (Flesch Reading Ease 26, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://centrium.co.uk/index.html — this page reads as very difficult (Flesch Reading Ease 26, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.

notice Likely hero image lacks fetchpriority=high

Rule images.hero_no_fetchpriority · Performance · 12 occurrence(s)

  • http://www.centrium.co.uk/cr.01.html — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • http://www.centrium.co.uk/home_onepage-copy.html — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • http://www.centrium.co.uk/index.html — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • http://www.centrium.co.uk/ls.01.html — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • http://www.centrium.co.uk/projects.html — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • http://www.centrium.co.uk/sw.01.html — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://centrium.co.uk/ — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://centrium.co.uk/cr.01.html — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://centrium.co.uk/index.html — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://centrium.co.uk/ls.01.html — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://centrium.co.uk/projects.html — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://centrium.co.uk/sw.01.html — the likely hero/LCP image (centrium_signage_logo.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.

notice Images without width/height (layout shift / CLS)

Rule images.missing_dimensions · Images · 6 occurrence(s)

notice Internal link has no anchor text / accessible name

Rule links.no_anchor_text · Links · 10 occurrence(s)

  • http://www.centrium.co.uk/cr.01.html — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
  • http://www.centrium.co.uk/home_onepage-copy.html — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
  • http://www.centrium.co.uk/index.html — 3 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
  • http://www.centrium.co.uk/ls.01.html — 2 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
  • http://www.centrium.co.uk/sw.01.html — 2 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
  • https://centrium.co.uk/ — 3 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
  • https://centrium.co.uk/cr.01.html — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
  • https://centrium.co.uk/index.html — 3 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
  • https://centrium.co.uk/ls.01.html — 2 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
  • https://centrium.co.uk/sw.01.html — 2 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.

notice Page has only one internal inlink (fragile crawl path)

Rule links.single_inlink · Links · 1 occurrence(s)

notice Missing Open Graph tags

Rule og.missing · Social · 12 occurrence(s)

notice Legacy image format (jpg/png/gif) with no next-gen fallback

Rule perf.images_legacy_format · Performance · 12 occurrence(s)

  • http://www.centrium.co.uk/cr.01.html — 3 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • http://www.centrium.co.uk/home_onepage-copy.html — 122 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • http://www.centrium.co.uk/index.html — 7 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • http://www.centrium.co.uk/ls.01.html — 3 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • http://www.centrium.co.uk/projects.html — 169 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • http://www.centrium.co.uk/sw.01.html — 3 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://centrium.co.uk/ — 7 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://centrium.co.uk/cr.01.html — 3 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://centrium.co.uk/index.html — 7 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://centrium.co.uk/ls.01.html — 3 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://centrium.co.uk/projects.html — 169 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
  • https://centrium.co.uk/sw.01.html — 3 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.

notice No ETag header (no conditional GET for unchanged pages)

Rule perf.no_etag · Performance · 12 occurrence(s)

  • http://www.centrium.co.uk/cr.01.html — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • http://www.centrium.co.uk/home_onepage-copy.html — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • http://www.centrium.co.uk/index.html — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • http://www.centrium.co.uk/ls.01.html — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • http://www.centrium.co.uk/projects.html — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • http://www.centrium.co.uk/sw.01.html — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://centrium.co.uk/ — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://centrium.co.uk/cr.01.html — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://centrium.co.uk/index.html — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://centrium.co.uk/ls.01.html — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://centrium.co.uk/projects.html — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
  • https://centrium.co.uk/sw.01.html — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.

notice robots.txt missing (root returns 404/none)

Rule robots.txt_missing · Robots · 1 occurrence(s)

  • https://centrium.co.uk/ — robots.txt did not return a 200 at the site root — a healthy site should serve one (declare your sitemap and confirm the host serves root files)

notice No structured data detected

Rule schema.none · Structured Data · 12 occurrence(s)

notice Missing recommended security headers

Rule security.missing_headers · Security · 6 occurrence(s)

notice Indexable page not listed in sitemap

Rule sitemap.orphan_not_listed · Sitemap · 6 occurrence(s)

notice Title is very short

Rule title.too_short · Titles · 6 occurrence(s)

notice Missing Twitter Card tag

Rule twitter.missing · Social · 12 occurrence(s)

notice Underscores in URL path (prefer hyphens)

Rule url.underscores · URL · 1 occurrence(s)

Pages (showing 14 of 14)
URLStatusIndexableWordsIn-links
https://centrium.co.uk/index.html
CENTRIUM  |  HOME		 200 yes 301 6
https://centrium.co.uk/projects.html
CENTRIUM  |  PROJECTS		 200 yes 22 6
http://www.centrium.co.uk/index.html
CENTRIUM  |  HOME		 200 yes 301 6
http://www.centrium.co.uk/projects.html
CENTRIUM  |  PROJECTS		 200 yes 22 6
http://www.centrium.co.uk/ls.01.html
LS.01		 200 yes 48 3
http://www.centrium.co.uk/sw.01.html
SW.01		 200 yes 45 3
https://centrium.co.uk/cr.01.html
CR.01		 200 yes 61 3
https://centrium.co.uk/ls.01.html
LS.01		 200 yes 48 3
https://centrium.co.uk/sw.01.html
SW.01		 200 yes 45 3
http://www.centrium.co.uk/cr.01.html
CR.01		 200 yes 61 2
http://www.centrium.co.uk/home_onepage-copy.html
Home_OnePage copy		 200 yes 282 1
https://centrium.co.uk/
CENTRIUM  |  HOME		 200 yes 301 0
http://www.centrium.co.uk/assets/environmental-policy-2019.pdf 200 no 0 1
https://centrium.co.uk/assets/environmental-policy-2019.pdf 200 no 0 2

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