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Security report for marshalls.co.uk

Marshalls plc · Manufacturing · United Kingdom

Low risk. 1 critical or high finding in Security headers.

Security score

91/100

Risk levelLow

0–100, higher is better. How it is calculated

Marshalls plc is a well-established UK-based company specializing in the supply of hard landscaping, building, and roofing products. With a history dating back to the 1890s, the company positions itself as a leading supplier in the construction and landscaping sectors, targeting professional builders, landscapers, architects, and commercial clients. The website reflects a mature business with comprehensive sections on corporate governance, sustainability, and investor relations, indicating a transparent and structured corporate environment. Technically, the website employs modern web technologies including Umbraco CMS, Google Tag Manager for analytics, and OneTrust for consent management, demonstrating a commitment to digital maturity and privacy compliance. Security posture is solid with HTTPS enforced and consent mechanisms in place, though explicit security policies and incident response details are not publicly disclosed. The domain WHOIS data is unavailable due to a Nominet UK naming rules error, which is unusual and reduces domain registration trustworthiness, but the website content and branding strongly support legitimacy. Overall, the site is professional, well-structured, and compliant with privacy regulations, with recommendations to enhance transparency around security policies and domain registration details.

Scanned

NIS2 and GDPR posture

GDPR outside view
88/ 100 · Low
Checks completed
5of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

1 finding rated critical or high. Fix these first.

  1. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

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Keep watching marshalls.co.uk

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
100
Security headers
75
Network security
100
GDPR outside view
88
Average
91

Not counted

  • Email security: did not complete in this scan.
  • DNS health: did not complete in this scan.
  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Marshalls plc operates primarily in the manufacturing and construction materials sectors, offering a broad range of products such as aggregates, bricks, mortars, roofing, and water management solutions. The company targets B2B customers including construction professionals and commercial enterprises. Its market position as a leading UK supplier is supported by a long operational history and extensive product offerings. The website's investor relations and sustainability sections indicate a focus on corporate responsibility and stakeholder engagement. The business model relies on product manufacturing and supply chain distribution. The absence of direct contact emails or phone numbers on the site suggests a controlled communication channel, likely via contact forms. The company leverages digital tools for marketing and analytics, indicating a modern approach to customer engagement and data-driven decision making.

Security posture

The website demonstrates a good security posture with HTTPS enforced and the use of a reputable consent management platform (OneTrust) to comply with GDPR and other privacy regulations. Security headers are implied but not explicitly visible in the HTML, suggesting they may be configured at the server level. No exposed sensitive data or vulnerable libraries were detected in the provided content. However, the lack of publicly available security policies, incident response plans, or vulnerability disclosure mechanisms limits transparency and preparedness perception. The WHOIS data anomaly is a concern from a domain trust perspective but does not directly impact website security. Overall, the site is secure for users but could improve by publishing security governance documents and incident response contacts.

Recommendations

  1. Publish a dedicated security policy page detailing security practices and frameworks used.
  2. Provide clear incident response and vulnerability disclosure information, including contact channels.
  3. Verify and publicly display domain registration details or clarify the WHOIS anomaly to improve trust.
  4. Ensure all recommended security headers (CSP, X-Frame-Options, X-Content-Type-Options) are implemented and documented.
  5. Enhance contact information availability with verified company emails and phone numbers for customer and security inquiries.

Contact details published on the site

Legal name
Marshalls plc
Registration number
00509579
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Marshalls plc
Description
Marshalls plc: UK's leading supplier of hard landscaping, building, and roofing products since the 1890s, creating better places with innovative solutions
Key services
Hard landscaping products, Building materials, Roofing products, Aggregates, Mortars and screeds, Water management solutions
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, OneTrust Consent Management
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Consent management via OneTrust
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Marketing tools
OneTrust Consent Management
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with rich content and navigation
  2. No WAF or blocking mechanisms detected
  3. WHOIS data is unavailable and shows an error, limiting domain registration trust analysis
  4. Strong corporate presence with investor relations, sustainability, and governance information
  5. Comprehensive cookie consent and privacy mechanisms implemented
  6. No direct contact emails or phone numbers found in HTML; contact likely via forms
  7. No explicit security or incident response policies found on site
  8. Modern web technologies and consent management tools used
Technical notes

Notes

The website is built on the Umbraco CMS platform and uses modern JavaScript frameworks and modules. Google Tag Manager is integrated for analytics and marketing tracking, while OneTrust manages cookie consent and privacy compliance. The site is mobile-optimized with responsive design and accessibility features such as skip navigation links. Performance is moderate, with asynchronous loading of scripts and deferred JavaScript modules. Hosting appears to be on Microsoft Azure or a similar cloud provider based on CDN URLs. The site uses canonical URLs and Open Graph metadata for SEO and social media integration. No major technical debt or outdated technologies were detected, indicating a well-maintained infrastructure.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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