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Security report for sewell-group.co.uk

Sewell Group · Real Estate · United Kingdom

Medium risk. 4 critical or high findings in SSL/TLS and Security headers.

Security score

70/100

Risk levelMedium

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

Sewell Group is a well-established UK-based business group operating primarily in the real estate and retail sectors. The company offers a diverse range of services including investments, consultancy, construction, facilities management, and retail operations through its subsidiaries. The group emphasizes employee ownership, which fosters a strong culture and engagement among its workforce. Their market position is that of a reputable regional player with a legacy focus and community impact. Technically, the website is built on WordPress with modern SEO and GDPR compliance features, including cookie consent and Google Analytics integration. Security posture is solid with HTTPS and reCAPTCHA protections, though there is room for improvement in security headers and incident response transparency. Overall, the site is professional, trustworthy, and well-optimized for its audience.

Scanned

NIS2 and GDPR posture

GDPR outside view
95/ 100 · Low
Checks completed
7of 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

4 findings rated critical or high. Fix these first.

  1. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

  2. 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 Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • 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';…

Need hands-on remediation? Email guard@offseq.com

Keep watching sewell-group.co.uk

This scan found 22 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

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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
57
Security headers
15
Email security
85
DNS health
70
Network security
100
GDPR outside view
95
Average
70

Not counted

  • 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

The Sewell Group operates multiple subsidiaries focused on estates and retail, serving communities in Hull and East Yorkshire. Their business model leverages employee ownership to align interests and enhance company culture. The group’s diversified services and retail presence provide multiple revenue streams and market touchpoints. Their digital presence is supported by a professional website with clear navigation and strong branding consistency. The group maintains active social media channels and displays accreditations that enhance trust. The presence of multiple related domains for subsidiaries indicates a structured corporate ecosystem. Growth indicators include recent employee ownership transition and ongoing recruitment efforts.

Security posture

The website enforces HTTPS and integrates Google reCAPTCHA to protect forms, indicating a baseline security maturity. GDPR compliance is evident through cookie consent mechanisms and privacy policies. However, the absence of explicit security policies, incident response contacts, and security.txt files suggests gaps in transparency and readiness. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. Security headers appear to be missing or not explicitly declared, which could be improved to harden the site against common web attacks. Overall, the security posture is good but could benefit from enhanced documentation and technical controls.

Recommendations

  1. Implement standard security headers such as Content-Security-Policy, X-Frame-Options, and X-XSS-Protection to improve site security.
  2. Publish a clear security policy and incident response contact information to enhance transparency and trust.
  3. Consider adding a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
  4. Regularly audit and update third-party plugins and scripts to mitigate potential vulnerabilities.
  5. Enhance accessibility features and conduct periodic security training to strengthen security culture.

Contact details published on the site

Addresses
Legal name
Sewell Group
Registration number
03914317
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Sewell Group
Description
Sewell Group is a diverse group of businesses united by culture and purpose, operating in Estates and Retail sectors. They provide investments, consultancy, construction, facilities management, and retail services primarily in Hull and East Yorkshire.
Key services
Investments & Partnerships, Estates Consultancy, Construction, Facilities Management, Retail (fuel stations and convenience stores)
Content quality
good
Branding
consistent

Technology

Stack
WordPress, Yoast SEO, jQuery, Google reCAPTCHA, GDPR Cookie Compliance plugin
Platforms
WordPress CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Google reCAPTCHA integration on forms
  • GDPR cookie consent mechanism

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Marketing tools
Yoast SEO
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and well-structured
  2. Clear business focus on estates and retail sectors
  3. Employee ownership trust is a key trust and culture indicator
  4. GDPR compliance is well implemented with cookie consent and privacy policy
  5. No security policy or incident response info publicly available
  6. No visible security headers detected in HTML content
  7. Use of modern web technologies and SEO best practices
  8. Multiple related domains for subsidiaries and partner businesses linked
  9. No suspicious or malicious content detected
Technical notes

Notes

The website is built on WordPress CMS with Yoast SEO for search optimization and jQuery for client-side scripting. Google reCAPTCHA is used for bot protection on forms. The site uses a GDPR Cookie Compliance plugin to manage user consent. Hosting and domain registration are managed via Cloudflare, providing CDN and security benefits. The site demonstrates good mobile responsiveness and moderate performance. There is an opportunity to improve accessibility and implement additional security headers. The technical stack is modern and well-maintained, supporting the business’s digital presence effectively.
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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