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Security report for britishgas.co.uk

British Gas · Energy · United Kingdom

Low risk. 4 critical or high findings in SSL/TLS, Security headers and 1 other check.

Security score

77/100

Risk levelLow

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

British Gas is the largest energy and home services company in the UK, providing gas and electricity supply, boilers, boiler cover, and other home services. The company holds a strong market position with a comprehensive service offering targeting residential and business customers across the UK. The website reflects a mature digital presence with professional design, mobile optimization, and clear navigation. The technical infrastructure leverages modern web technologies including Polymer web components, Adobe Experience Manager CMS, and integrates multiple analytics and marketing tools such as Google Tag Manager and Amazon Connect Chat. Security posture is robust with HTTPS enforcement, security headers, and cookie consent mechanisms, although explicit security policies and incident response contacts are not publicly disclosed. The WHOIS lookup for the www subdomain failed due to domain naming rules, but this is consistent with UK domain registration practices where the main domain britishgas.co.uk is valid and authoritative. Overall, the website and domain are legitimate and trustworthy, representing a large enterprise with strong brand recognition.

Scanned

NIS2 and GDPR posture

GDPR outside view
65/ 100 · Medium
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 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

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, Twitter, LinkedIn

      What to do: Document all third-party data sharing in your privacy policy

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

Keep watching britishgas.co.uk

This scan found 18 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.

Daily monitoring

Recommended

€25per month

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

Email alerts on material changes and an exportable JSON history of every change.

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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
74
Security headers
65
Email security
85
DNS health
70
Network security
100
GDPR outside view
65
Average
77

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

British Gas operates in the energy sector as a key player in the UK market, offering a broad range of energy and home services. Its business model focuses on energy supply combined with value-added home services such as boiler installation and maintenance. The company benefits from its parent company Centrica plc, which provides strategic support and resources. British Gas targets a wide customer base including residential consumers and businesses, leveraging digital channels for customer engagement and service delivery. The partnership ecosystem includes Centrica and various technology providers. The website content and structure indicate a focus on customer service, energy efficiency, and product offerings aligned with market demands. Growth indicators include digital transformation efforts and marketing investments in analytics and customer interaction platforms.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and multiple security headers implemented, including Content Security Policy and Strict-Transport-Security. Cookie consent mechanisms comply with GDPR requirements, enhancing privacy compliance. However, the absence of a publicly available security policy, incident response information, or vulnerability disclosure program limits transparency and may impact incident readiness perception. No vulnerabilities or exposed sensitive data were detected in the HTML content. The use of third-party scripts is extensive but appears managed. Overall, the security maturity is good but could be improved by publishing explicit security and incident response documentation and establishing a vulnerability disclosure channel.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and compliance frameworks.
  2. Provide clear incident response contact information and establish a vulnerability disclosure program or security.txt file.
  3. Include data protection officer contact details to enhance GDPR transparency.
  4. Regularly review and audit third-party scripts and libraries to mitigate potential vulnerabilities.
  5. Enhance user trust by displaying relevant certifications and compliance badges on the website.

Contact details published on the site

Addresses
Legal name
British Gas
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
British Gas
Description
British Gas is the largest UK energy and home services company. We supply gas and electricity, boilers and boiler cover as well as other home services.
Key services
Gas supply, Electricity supply, Boilers, Boiler cover, Home services
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, jQuery, Google Tag Manager, Amazon Connect Chat, Adobe Launch, Polymer, Web Components
Frameworks
Polymer
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Content Security Policy present
  • Secure cookie consent mechanism
  • No exposed sensitive data in HTML

Analytics and tracking

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

Advertising

Ad networks
Google Ads, Twitter Ads
Marketing tools
Adobe Launch, Amazon Connect Chat
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and fully accessible.
  2. No WAF or blocking mechanisms detected.
  3. Comprehensive privacy and cookie policies with consent mechanisms.
  4. No explicit security policy or incident response info published.
  5. WHOIS data unavailable for www subdomain but likely valid for main domain.
  6. Multiple trusted external scripts and analytics tools used.
  7. Strong branding and consistent content quality.
  8. No adult or questionable content detected.
Technical notes

Notes

The website is built on Adobe Experience Manager CMS and uses Polymer web components for modular UI. It integrates multiple analytics and marketing tools including Google Tag Manager, Adobe Launch, and Amazon Connect Chat. The site is mobile-optimized with responsive design and accessibility considerations. Performance is moderate, with room for optimization in loading speed. The technical stack is modern and well-maintained, supporting a large enterprise digital presence. Opportunities exist to improve technical SEO and accessibility further. Hosting provider details are not explicitly identified but likely managed by Centrica or a major UK hosting provider.
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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