Skip to main content

Security report for llewellynandco.co.uk

Llewellyn & Co · Real Estate · United Kingdom

Medium risk. 6 critical or high findings in SSL/TLS, Security headers and 1 other check.

Security score

60/100

Risk levelMedium

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

Llewellyn & Co is a small, family-owned independent estate and lettings agency specializing in the West London housing market. The company offers a range of services including property lettings, sales, valuations, and landlord support, targeting landlords and tenants in areas such as Hammersmith, Shepherds Bush, and Chiswick. The website reflects a local market focus with a professional but basic online presence, emphasizing personal service and local expertise. Technically, the website is built on ASP.NET WebForms and uses older JavaScript libraries such as jQuery 1.4.2 and Colorbox for UI elements. While functional, the technology stack is outdated, which may pose security and performance challenges. The site includes basic SEO and accessibility features but lacks modern optimizations and mobile responsiveness is limited. From a security perspective, the site shows some positive indicators such as a cookie consent banner and use of HTTPS (implied but not confirmed). However, it lacks important security headers and uses outdated libraries with known vulnerabilities. The WHOIS data is unavailable or invalid, which raises concerns about domain registration legitimacy. No incident response or security policy information is provided. Overall, the website is moderately trustworthy and functional for its business purpose but requires technical and security improvements. The lack of valid WHOIS data and outdated technology stack are key risk factors. Strategic recommendations include updating the technology stack, enhancing security headers, verifying domain registration, and improving privacy compliance to strengthen trust and security posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 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

6 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
    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

  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 llewellynandco.co.uk

This scan found 26 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.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
32
Security headers
15
Email security
85
DNS health
60
Network security
100
GDPR outside view
68
Average
60

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

Llewellyn & Co operates as a niche real estate agency focused on residential lettings and sales in West London. Their business model centers on personalized service to landlords and tenants, leveraging local market knowledge. The company appears to maintain a small operational size with no evidence of subsidiaries or parent companies. Their partnership ecosystem includes recognized industry bodies such as The Property Ombudsman and Trading Standards, enhancing credibility. Revenue streams likely derive from lettings commissions, sales fees, and valuation services. The website content and featured properties indicate active engagement in the local market. Growth indicators are limited but the presence of certifications suggests a commitment to industry standards. The absence of social media and modern digital marketing tools may limit broader market reach.

Security posture

The current security posture of the website is basic with several areas of concern. The use of an outdated jQuery version (1.4.2) exposes the site to known vulnerabilities that could be exploited. The absence of key security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security reduces protection against common web attacks. While HTTPS usage is implied, it is not explicitly confirmed in the HTML content. No dedicated security policy, incident response contacts, or vulnerability disclosure mechanisms are present, indicating limited security governance. The cookie consent banner is a positive privacy compliance indicator but GDPR compliance is not fully evident. Overall, the site requires significant security enhancements to mitigate risks and align with best practices.

Recommendations

  1. Upgrade all JavaScript libraries, especially jQuery, to the latest secure versions to eliminate known vulnerabilities.
  2. Implement comprehensive security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to enhance protection.
  3. Verify domain registration details and ensure WHOIS information is accurate and publicly available to improve legitimacy and trust.
  4. Enhance privacy compliance by updating the privacy policy to explicitly address GDPR requirements and improve cookie consent mechanisms.
  5. Develop and publish a security policy and incident response plan with clear contact channels to demonstrate security governance and readiness.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Llewellyn & Co
Description
Llewellyn & Co is an independently owned and operated lettings agency with a vast wealth of knowledge in the West London housing market, whom supply a friendly and professional approach in property sourcing.
Key services
Property lettings, Sales, Valuations, Landlord services
Content quality
good
Branding
moderate

Technology

Stack
jQuery 1.4.2, Colorbox jQuery plugin, ASP.NET WebForms
Frameworks
ASP.NET
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
basic

Security

Observed score
45/100
Good practices seen
  • Cookie consent banner implemented
  • Use of HTTPS implied but not confirmed in HTML

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is a small independent real estate lettings agency focused on West London.
  2. WHOIS data is unavailable or invalid, indicating possible domain registration issues.
  3. Website uses outdated JavaScript libraries with potential security risks.
  4. Cookie consent banner is implemented, indicating some privacy awareness.
  5. No visible advanced security headers or incident response information.
  6. Contact information is clearly provided with company email and phone number.
  7. Certifications from Money Shield and Trading Standards are displayed.
  8. No social media links found in the HTML content.
  9. Website design and technical implementation are basic but functional.
Technical notes

Notes

The website is built on an ASP.NET WebForms platform using legacy JavaScript libraries such as jQuery 1.4.2 and Colorbox for UI effects. The HTML structure is functional but dated, with limited mobile optimization and basic accessibility features. Performance is moderate, with no evidence of modern front-end frameworks or content delivery networks. SEO is basic with meta description and keywords present but no Open Graph or JSON-LD structured data detected. The site uses server-side form validation and client-side JavaScript for UI interactions. Hosting provider and SSL certificate details are not discernible from the HTML content. Overall, the technical infrastructure supports the business needs but would benefit from modernization and performance optimization.
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

Reviews of this site

Share your experience with llewellynandco.co.uk. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review llewellynandco.co.uk.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.