SSEN Transmission · Energy · United Kingdom
Medium risk. 3 critical or high findings in Email security and SSL/TLS.
SSEN Transmission is a key electricity transmission network operator in the United Kingdom, focused on delivering a reliable, resilient, and innovative energy transmission infrastructure. The company operates under the parent organization Scottish and Southern Electricity Networks (SSEN) and targets stakeholders in the energy sector including regulators and customers. Their website reflects a professional and consistent brand image, emphasizing network safety, smart technology, and environmental sustainability. Technically, the website employs modern tools such as Google Tag Manager, Microsoft Azure Application Insights, and OneTrust for cookie consent, indicating a mature digital infrastructure. The site is built on a CMS platform likely Episerver, hosted on Microsoft Azure, and demonstrates good performance, mobile optimization, and accessibility features. From a security perspective, the site enforces HTTPS, implements multiple security headers, and integrates cookie consent mechanisms, reflecting a strong security posture. However, explicit security policies and incident response information are not prominently available, suggesting room for improvement in transparency and preparedness. Overall, the website is trustworthy and professional with no signs of blocking or WAF interference. The WHOIS data is unavailable due to the domain being a subdomain, which is consistent with the organizational structure. Strategic recommendations include publishing detailed security policies, vulnerability disclosure information, and enhancing visibility of data protection contacts to further strengthen trust and compliance.
Scanned
NIS2 Art. 21(2)
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.
3 findings rated critical or high. Fix these first.
SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.
SPF helps prevent email spoofing
What to do: Add SPF record: "v=spf1 include:_spf.yourmailprovider.com ~all"
TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.
Server supports weak protocols: TLSv1.1
What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions
SSL certificate uses 256-bit key, which is considered weak
What to do: Use at least 2048-bit RSA or 256-bit ECC key
Need hands-on remediation? Email guard@offseq.com
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.
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Each check with its score, findings and the evidence it collected.
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
Not counted
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.
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
Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.
Leaked records that mention ssen-transmission.co.uk, from OffSeq Breach.
No leaked records found
Breach holds no records for ssen-transmission.co.uk right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.
Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.
Automated reading of the public site. Ratings are indicative.
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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