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Security report for mainstreamplumbing.co.uk

Mainstream Plumbing & Heating Ltd · Real Estate · United Kingdom

Medium risk. 7 critical or high findings in SSL/TLS, Security headers and 1 other check.

Security score

56/100

Risk levelMedium

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

Mainstream Plumbing & Heating Ltd is a small UK-based company specializing in plumbing and heating services primarily for new build construction projects. The company has over twenty years of experience and serves regions including Yorkshire & Humberside, East Anglia, and The Midlands. Their client base includes notable developers such as Barratts, Lindens, Bovis, and Morris Homes. The website content is straightforward, providing a basic overview of their services and company values, but lacks detailed contact information and compliance documentation. Technically, the website is built using RapidWeaver CMS and incorporates older JavaScript libraries such as jQuery 1.11.0 and Modernizr. The site shows basic mobile optimization and accessibility but lacks modern security features such as HTTPS enforcement and security headers. There is no evidence of analytics or tracking tools, and no privacy or cookie policies are present, indicating low digital maturity. From a security perspective, the absence of HTTPS and security headers, combined with the failure to retrieve WHOIS data due to domain registration errors, raises concerns about the domain's legitimacy and security posture. No forms or data collection mechanisms are present, reducing exposure to input-based vulnerabilities but also limiting user engagement. The website does not demonstrate GDPR compliance or incident response readiness. Overall, while the business appears legitimate and established based on website content, the technical and security shortcomings, especially the domain registration issues, present risks. Strategic improvements in security, compliance, and digital presence are recommended to enhance trust and operational resilience.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
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

7 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 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';…

  3. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

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

Keep watching mainstreamplumbing.co.uk

This scan found 31 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
54
Security headers
25
Email security
55
DNS health
65
Network security
100
GDPR outside view
35
Average
56

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 company operates in the Real Estate sector, focusing on plumbing and heating services for new build developments. Their market positioning is that of a regional specialist with a long-standing reputation and NHBC awards, which serve as trust signals. The business model is service-oriented, targeting property developers and construction firms. The website content suggests a stable but small-sized company with no visible parent or subsidiary relationships. The lack of digital marketing tools and social media presence indicates limited online growth initiatives. Partnerships with known developers suggest a solid industry network, but the absence of detailed business credentials and contact information online may hinder broader market reach.

Security posture

The current security posture is weak due to missing HTTPS enforcement, lack of security headers, and no visible privacy or cookie policies. The website does not collect user data via forms, which reduces attack surface but also limits engagement. The failure to retrieve WHOIS data due to domain naming issues is a significant red flag, potentially indicating misconfiguration or registration problems. There is no evidence of incident response policies or security certifications. Overall, the site is vulnerable to basic web security risks and lacks compliance with GDPR and other data protection standards.

Recommendations

  1. Implement HTTPS across the entire website to secure data transmission and improve trust.
  2. Add comprehensive privacy and cookie policies to comply with GDPR and inform users.
  3. Resolve domain registration issues to ensure WHOIS data availability and domain legitimacy.
  4. Incorporate security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  5. Upgrade JavaScript libraries to current secure versions and consider adding secure contact forms with validation.

Contact details published on the site

Addresses
Legal name
Mainstream Plumbing & Heating Ltd
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Mainstream Plumbing & Heating Ltd
Description
Mainstream Plumbing & Heating Ltd is a company based in Lincoln, running for over twenty years, serving Yorkshire & Humberside, East Anglia and The Midlands. They provide complete plumbing and heating packages with first class customer service. They work with developers including Barratts, Lindens, Bovis and Morris homes on new build contracts.
Key services
plumbing, heating, new build contracts
Content quality
basic
Branding
moderate

Technology

Stack
jQuery 1.11.0, Modernizr
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
basic

Security

Observed score
30/100

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

Design
basic
User experience
basic
Content relevance
good
Navigation
basic
Professionalism
basic
Trustworthiness
moderate

Key observations

  1. Website uses RapidWeaver CMS with basic design and navigation.
  2. No privacy, cookie, or terms of service policies found.
  3. No contact emails or phone numbers explicitly provided on the site.
  4. Physical address is provided in footer.
  5. No forms or data collection mechanisms detected.
  6. No social media links found.
  7. No security headers or HTTPS status available from provided data.
  8. WHOIS data unavailable due to domain registration error.
Technical notes

Notes

The website uses RapidWeaver CMS with a simple tech stack including jQuery 1.11.0 and Modernizr. The design is basic with moderate performance and limited mobile optimization. No advanced frameworks or hosting provider information is available. The site lacks modern SEO and accessibility features and does not utilize analytics or marketing tools. The absence of HTTPS and security headers indicates technical debt and potential security risks. The domain registration error suggests a need for domain management review. Overall, the technical infrastructure is functional but outdated and requires modernization to meet current web standards.
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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