# BeaverCheck Audit Report — https://nhm.ac.uk **Date:** April 21, 2026 **URL:** https://nhm.ac.uk **Overall Grade:** C (75/100) **Report:** https://beavercheck.com/results/0decd923-c00e-4b98-8085-955a03bbae78 ## Top Findings 1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers 2. **[CRITICAL]** HSTS header is missing — Security > Security Headers 3. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy 4. **[CRITICAL]** 1 link(s) with no accessible text — Accessibility > Link & Button Quality 5. **[WARNING]** /server-status is publicly accessible — Security > Information Leakage --- ## Lighthouse Scores | Category | Score | |----------|-------| | Performance | 49 | | Accessibility | 100 | | Best Practices | 81 | | SEO | 100 | --- ## Security ### Security Headers (F — 10/100) *2 of 10 headers properly configured* - **[CRITICAL]** HSTS header is missing — Strict-Transport-Security forces browsers to use HTTPS, preventing downgrade attacks. Add the header with a max-age of at least 1 year. - **[WARNING]** X-Content-Type-Options header is missing — This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'. - **[WARNING]** X-Frame-Options header is missing — This header prevents clickjacking by controlling who can embed your page in a frame. Set it to DENY or SAMEORIGIN. - **[WARNING]** Referrer-Policy header is missing — Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter. - **[WARNING]** Permissions-Policy header is missing — Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features. - **[CRITICAL]** Content-Security-Policy header is missing — CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis. - **[WARNING]** Cross-Origin-Opener-Policy header is missing — COOP isolates your browsing context, preventing cross-origin side-channel attacks. Set to 'same-origin'. - **[WARNING]** Cross-Origin-Embedder-Policy header is missing — COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers. - **[PASS]** X-Powered-By header is not present - **[PASS]** Server header is present without version info ### Content Security Policy (F — 0/100) *No enforcing CSP policy found* - **[CRITICAL]** No Content-Security-Policy header found — CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading. ### TLS & Certificates (A+ — 100/100) *TLS 1.3, 7 checks passed* - **[PASS]** TLS 1.3 is used - **[PASS]** Strong cipher suite is used - **[INFO]** HTTP/2 is not negotiated — HTTP/2 provides multiplexing and header compression for better performance. - **[PASS]** Certificate is valid (expires in 39 days) - **[PASS]** Certificate chain has 3 certificates - **[PASS]** Certificate uses modern signature algorithm - **[PASS]** Certificate covers 2 domain(s) - **[PASS]** Certificate is issued by a trusted CA ### Cookie Security (A+ — 100/100) *No cookies set — no cookie security risks* - **[PASS]** No cookies set — no cookie security risks --- ## Advanced Security ### Subresource Integrity (D — 40/100) *1 of 7 external resources have SRI* - **[WARNING]** External script from www.googletagmanager.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from assets.adobedtm.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from assets.adobedtm.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from assets.adobedtm.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from assets.adobedtm.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[WARNING]** External script from assets.adobedtm.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. - **[PASS]** script from static.cloudflareinsights.com has SRI protection ### JS Library Vulnerabilities (A+ — 100/100) *No known vulnerabilities* - **[PASS]** No known JavaScript library vulnerabilities detected ### Information Leakage (A — 85/100) *Potential exposures found* - **[WARNING]** /server-status is publicly accessible — Debug or admin endpoint is accessible. This may expose server internals or provide attack vectors. - **[PASS]** security.txt is present — good practice ### Email Security (A — 85/100) *DMARC: quarantine* - **[PASS]** DMARC policy is quarantine — good protection ### Permissions-Policy (D — 40/100) *No header set* - **[WARNING]** No Permissions-Policy header — Consider adding a Permissions-Policy header to restrict browser feature access from embedded content. ### CORS Configuration (B — 80/100) *No CORS headers* - **[PASS]** No CORS headers present — secure default --- ## Performance ### Page Weight Budget (C — 64/100) *1.7 MB transferred, 50 requests* - **[INFO]** Page weighs 4.2 MB (1.7 MB transferred) - **[WARNING]** JavaScript is 879 KB — consider code splitting or lazy loading — Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts. - **[PASS]** 50 HTTP requests - **[INFO]** Estimated 0.36 g CO2 per page load ### Third-Party Impact (D — 50/100) *100% third-party, 0 ms blocking* - **[WARNING]** Third-party code accounts for 100% of page weight (1.7 MiB of 1.7 MiB) - **[PASS]** Third-party blocking time is low (0 ms) ### Text Compression (A+ — 100/100) *All text resources are compressed* - **[PASS]** All text resources are compressed ### Image Optimization (B — 75/100) *12 images, 0 KB saveable* - **[PASS]** All images are well-optimized ### JS Execution Cost (F — 20/100) *3659ms total JS execution* - **[WARNING]** https://www.nhm.ac.uk/: 999ms CPU time - **[WARNING]** https://www.nhm.ac.uk/_next/static/chunks/framewor...: 950ms CPU time - **[WARNING]** https://www.nhm.ac.uk/_next/static/chunks/pages/_a...: 450ms CPU time - **[WARNING]** https://www.googletagmanager.com/gtm.js?id=GTM-5TD...: 327ms CPU time - **[WARNING]** Unattributable: 301ms CPU time - **[WARNING]** Third-party scripts: 3659ms (100% of total) ### Font Loading (A+ — 100/100) *2 fonts (179 KB)* - **[INFO]** 2 font(s) use font-display: swap (FOUT risk but functional) ### JS Bundles (D — 40/100) *20 scripts, 487 KB unused* - **[WARNING]** https://www.nhm.ac.uk/_next/static/chunks/pages/_a...: 363 KB unused (75%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://www.googletagmanager.com/gtm.js?id=GTM-5TD...: 91 KB unused (51%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://assets.adobedtm.com/c2b29812570b/d7d2d2aae...: 34 KB unused (47%) — Consider code splitting or tree shaking to reduce unused code. - **[INFO]** Total unused JavaScript: 487 KB ### Resource Caching (A+ — 100/100) *All resources properly cached* - **[PASS]** No caching issues found ### Critical Rendering Path (A+ — 100/100) *No render-blocking resources* - **[PASS]** No render-blocking resources detected ### Resource Hints (A+ — 100/100) *3 hints, 0 missing preconnects* - **[PASS]** Page uses 3 resource hint(s) ### Page Weight Inventory (F — 35/100) *50 resources · 1.7 MB · 487 KB savings available* - **[WARNING]** Page weight 745 KB over 1MB target - **[INFO]** ~487 KB of savings available - **[WARNING]** 49 third-party resources (100% of weight) - **[INFO]** 1 resources over 200KB ### Render-Blocking Resources (A+ — 100/100) *No render-blocking resources detected* - **[PASS]** No render-blocking resources detected in ### Third-Party Resources (A+ — 100/100) *No third-party resources detected* --- ## Content Quality ### Links (F — 40/100) *136 links checked, 114 healthy, 22 broken* - **[CRITICAL]** 114 of 136 links are healthy - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/cdn-cgi/content?id=y_7Sp3tn_XLRHL2v... — Found in . Returns HTTP 404. - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/whats-on.html — Found in . Get "https://www.nhm.ac.uk/whats-on.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/schools.html — Found in . Get "https://www.nhm.ac.uk/schools.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/visit/access-at-south-kensington.html — Found in . Get "https://www.nhm.ac.uk/visit/access-at-south-kensington.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/visit/tring/getting-here.html — Found in . Get "https://www.nhm.ac.uk/visit/tring/getting-here.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/visit/tring/whats-on-tring.html — Found in . Get "https://www.nhm.ac.uk/visit/tring/whats-on-tring.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/take-part/identify-nature.html — Found in . Get "https://www.nhm.ac.uk/take-part/identify-nature.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/take-part/find-your-climate-action.... — Found in . Get "https://www.nhm.ac.uk/take-part/find-your-climate-action.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/visit/exhibitions/wildlife-photogra... — Found in . Get "https://www.nhm.ac.uk/visit/exhibitions/wildlife-photographer-of-the-year.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/visit/london.html — Found in . Get "https://www.nhm.ac.uk/visit/london.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/connect-with-nature/explore-uk-natu... — Found in . Get "https://www.nhm.ac.uk/connect-with-nature/explore-uk-nature.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/connect-with-nature/actions-for-nat... — Found in . Get "https://www.nhm.ac.uk/connect-with-nature/actions-for-nature.html": context deadline exceeded - **[CRITICAL]** Broken link: https://staging.nhm.ac.uk/about-us/privacy-notice.html — Found in . Get "https://staging.nhm.ac.uk/about-us/privacy-notice.html": resolve staging.nhm.ac.uk: lookup staging.nhm.ac.uk on 1.1.1.1:53: no such host - **[CRITICAL]** Broken link: https://instagram.com/natural_history_museum — Found in . Returns HTTP 429. - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/discover/oceans.html — Found in . Get "https://www.nhm.ac.uk/discover/oceans.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/take-part/volunteer.html — Found in . Get "https://www.nhm.ac.uk/take-part/volunteer.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/our-science/services/facilities.html — Found in . Get "https://www.nhm.ac.uk/our-science/services/facilities.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/our-science/study.html — Found in . Get "https://www.nhm.ac.uk/our-science/study.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/business-services.html — Found in . Get "https://www.nhm.ac.uk/business-services.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/business-services/consulting.html — Found in . Get "https://www.nhm.ac.uk/business-services/consulting.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/business-services/publishing.html — Found in . Get "https://www.nhm.ac.uk/business-services/publishing.html": context deadline exceeded - **[CRITICAL]** Broken link: https://www.nhm.ac.uk/business-services/venue-hire.html — Found in . Get "https://www.nhm.ac.uk/business-services/venue-hire.html": context deadline exceeded ### Mixed Content (A+ — 100/100) *No mixed content detected — all resources use HTTPS.* - **[PASS]** No mixed content detected — all resources use HTTPS ### Open Graph (C — 70/100) *Open Graph tags are partially configured — some improvements recommended.* - **[WARNING]** Missing og:image — The og:image tag provides a preview image for social sharing. - **[INFO]** Missing og:type — The og:type tag helps social platforms categorize the content. - **[INFO]** Missing og:site_name — The og:site_name tag displays the website name in social previews. - **[INFO]** Missing twitter:card — Without twitter:card, Twitter falls back to Open Graph tags. Adding it gives you more control. ### Structured Data (C — 40/100) *No structured data (JSON-LD) found.* - **[INFO]** No structured data (JSON-LD) found — Adding structured data helps search engines understand your content and can enable rich results. --- ## Infrastructure ### DNS Records (A — 90/100) *2 A records, 682 ms lookup* - **[PASS]** Resolves to 2 IPv4 address(es) - **[PASS]** Has 2 IPv6 (AAAA) record(s) - **[PASS]** 2 nameserver(s) configured - **[PASS]** 1 mail exchanger(s) configured - **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update. - **[PASS]** SPF record present in TXT - **[WARNING]** DNS resolution is slow (682 ms) — Slow DNS adds latency to every page load. Consider a faster DNS provider. ### Redirect Chain (A — 90/100) *1 redirect(s), 57 ms total* - **[PASS]** Single redirect - **[INFO]** WWW normalization redirect ### IPv6 Readiness (A+ — 100/100) *IPv6 reachable (2 ms)* - **[PASS]** IPv6 is configured and reachable at 2606:4700::6812:1174, 2606:4700::6812:1074 ### Crawlability (A+ — 95/100) *robots.txt present, sitemap with 3325 URLs* - **[PASS]** robots.txt is present - **[PASS]** sitemap.xml is present - **[PASS]** sitemap.xml is valid XML - **[PASS]** sitemap.xml contains 3325 entries - **[INFO]** robots.txt does not reference a sitemap — Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap. ### URL Variants (B — 75/100) *www/non-www, trailing slash, HTTP→HTTPS* - **[CRITICAL]** Both www and non-www versions serve content - **[PASS]** HTTP correctly 301-redirects to HTTPS ### Domain Intelligence (A+ — 100/100) *nhm.ac.uk — via No registrar listed. This domain is directly registered with Nominet.* - **[PASS]** Registrar: No registrar listed. This domain is directly registered with Nominet. - **[WARNING]** Registrar lock is NOT enabled — The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers. --- ## Compliance ### WCAG Compliance (A+ — 100/100) *No testable criteria* ### Cookie Consent & Privacy (A+ — 95/100) *privacy policy found* - **[PASS]** Privacy policy link found - **[INFO]** No terms of service link detected - **[INFO]** No cookie consent banner detected - **[INFO]** This is an automated check, not legal advice — BeaverCheck detects technical indicators of consent management. This does not constitute a legal compliance assessment. Consult a privacy professional for GDPR/CCPA compliance. ### Language & i18n (A — 90/100) *Lang attribute present* - **[PASS]** attribute is present - **[PASS]** value is valid - **[INFO]** No Content-Language HTTP header - **[INFO]** Language signals are inconsistent — The attribute and Content-Language header should agree. ### Readability & Typography (A+ — 100/100) *Font sizes and tap targets checked* ### Viewport Configuration (A+ — 100/100) *Viewport properly configured* - **[PASS]** Viewport meta tag is present - **[PASS]** width=device-width is set - **[PASS]** User zooming is allowed ### Third-Party Trackers (A+ — 95/100) *4 trackers detected* - **[INFO]** 4 third-party trackers detected — Found 2 analytics, 0 advertising, 0 marketing, 2 tag manager trackers. ### Cookie & Tracker Inventory (A+ — 100/100) *0 cookies · 4 trackers · 0 pre-consent* - **[INFO]** 4 third-party tracker(s) detected on page --- ## Legal ### Legal Page Ecosystem (C — 55/100) *3 of 7 expected legal pages detected* - **[WARNING]** Privacy Policy not detected — No link matching common Privacy Policy URL patterns or link text was found. Most websites are expected to have a Privacy Policy, especially those collecting user data. - **[PASS]** Terms of Service detected — Found at https://www.nhm.ac.uk/about-us/website-terms-conditions.html, linked from footer. - **[PASS]** Cookie Policy detected — Found at https://www.nhm.ac.uk/about-us/cookies-on-the-museums-website.html, linked from footer. - **[PASS]** Accessibility Statement detected — Found at https://www.nhm.ac.uk/visit/access-at-south-kensington.html. - **[INFO]** DMCA / Copyright Notice not detected — No link matching common DMCA / Copyright Notice URL patterns or link text was found. Most websites are expected to have a DMCA / Copyright Notice, especially those collecting user data. - **[INFO]** Refund / Returns Policy not detected — No link matching common Refund / Returns Policy URL patterns or link text was found. Most websites are expected to have a Refund / Returns Policy, especially those collecting user data. - **[INFO]** Acceptable Use Policy not detected — No link matching common Acceptable Use Policy URL patterns or link text was found. Most websites are expected to have a Acceptable Use Policy, especially those collecting user data. ### Copyright Notice (C — 55/100) *No copyright notice detected* - **[INFO]** No copyright notice detected — No copyright notice detected in the page content. While not legally required in most jurisdictions (copyright exists automatically), a notice is standard practice and signals site ownership. ### Regulatory Indicators *3 regulatory indicator(s) detected* - **[INFO]** This is a technical scan, not a legal assessment — BeaverCheck detects technical indicators that may suggest regulatory relevance. This is not a compliance audit and should not be relied upon for legal decisions. Consult qualified legal counsel for compliance assessments. - **[INFO]** GDPR indicators detected (moderate confidence) — Indicators suggesting GDPR may be relevant: Privacy policy page found. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents. - **[INFO]** ADA indicators detected (moderate confidence) — Indicators suggesting ADA may be relevant: Accessibility link found: Accessibility. Americans with Disabilities Act / Section 508 — requires digital accessibility for people with disabilities. - **[INFO]** HIPAA indicators detected (weak confidence) — Indicators suggesting HIPAA may be relevant: Text mentions: phi. Health Insurance Portability and Accountability Act — protects sensitive patient health information. ### Third-Party Data Sharing *1 third-party service(s) detected* - **[INFO]** Data inventory for transparency purposes — This inventory identifies third-party services that receive data from your site visitors. Under regulations like GDPR (Article 30), maintaining records of data processing activities is commonly considered a best practice. This automated scan provides a starting point — it may not capture all data flows. - **[INFO]** 1 third-party services across 1 categories — 1 third-party services detected across 1 categories: Tag Management (1). Each of these services receives some user data from your site visitors. - **[INFO]** Google Tag Manager (Tag Management) — Detected via script URL. Typically collects: Orchestrates other tracking scripts, Page views. Privacy policy: https://policies.google.com/privacy. Data Processing Agreement available. ### Compliance Badges (B — 70/100) *1 compliance badge(s) detected* - **[PASS]** TRUSTe / TrustArc badge detected — Found via body text: 'truste'. Note: the presence of a badge does not verify the certification is current or valid. --- ## Availability ### CDN & Delivery (B — 80/100) *Cloudflare* - **[PASS]** Site is served via Cloudflare CDN (edge: GRU) ### HTTP Caching (F — 30/100) *No cache headers* - **[WARNING]** No Cache-Control header found — Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers. ### Transport Security (B — 75/100) *HTTP/3, HSTS, and TLS version analysis* - **[INFO]** HTTP/3 (QUIC) not advertised — HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it. - **[WARNING]** Missing Strict-Transport-Security header — HSTS tells browsers to only use HTTPS, preventing SSL stripping attacks. - **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT) --- ## Accessibility ### Landmark Structure (A — 85/100) *7 landmarks* - **[PASS]**
landmark present - **[PASS]** 2