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  • Acoustics, Noise & Vibration Consultants
  • Air Quality
  • Archaeology & Heritage
  • Contaminated Land & Remediation
  • Ecology & Biodiversity
  • Environmental Impact Assessment
  • Construction Environmental Management
  • Environmental Permitting
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  • Soils & Peat
  • Waste

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  • Structural Engineering
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  • Asset Integrity

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  • Process Safety Consultants

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Third Party Verification & Assurance
Home | Services | Sustainability Strategy, Reporting and Verification | Third Party Verification & Assurance

Third Party Verification & Assurance

Independent Assurance for Credible Sustainability Reporting

View All Sustainability Strategy, Reporting and Verification Services
Sustainability Strategy Development

Why third party verification matters

As sustainability reporting becomes more visible and regulated, organisations face growing pressure to ensure their data is accurate and trustworthy. Arthian’s independent verification and assurance services help you validate your disclosures, meet stakeholder expectations, and reduce reputational risk.

What is third party verification?

Third party verification is the independent review of sustainability data, claims, or reports to confirm accuracy, completeness, and alignment with recognised standards. It’s increasingly expected by investors, regulators, customers, and ESG ratings providers—and essential for credible reporting.

Our verification & assurance services

We tailor every FRA to the unique characteristics of the site and the level of risk involved. Our assessments are prepared in accordance with the National Planning Policy Framework (NPPF), Planning Policy Wales, SEPA guidance, and other relevant statutory requirements.

Site Appraisal & Data Review
Carbon footprint verification
Sustainability report assurance
Net zero & ESG claims review
Audit readiness & pre-assurance support
Third Party Verification Assurance Consultancy Sustainability Report Assurance

Site Appraisal & Data Review

We offer impartial verification and assurance for carbon footprints, ESG disclosures, and sustainability reports, helping you build confidence in your data and demonstrate integrity in your sustainability performance.


     
    Our service includes:


       

    • Independent review of site-level data and documentation
    • Verification of carbon footprints and ESG disclosures
    • Assurance of sustainability reporting accuracy and credibility
Third Party Verification Assurance Consultancy Sustainability Report Assurance

Carbon footprint verification

We verify Scope 1, 2, and 3 emissions against GHG Protocol, ISO 14064-1, and PAS 2060. Our process includes reviewing data sources, emissions factors, methodologies, and supporting documentation to ensure accuracy and credibility.


     
    Our verification covers:


       

    • Scope 1, 2, and 3 emissions data
    • Methodologies and factor selection
    • Review of documentation and reporting standards
    • Alignment with GHG Protocol, ISO 14064-1, and PAS 2060
Third Party Verification Assurance Consultancy Sustainability Report Assurance

Sustainability report assurance

We provide limited or reasonable assurance of ESG reports, checking data accuracy, framework alignment, narrative claims, and supporting evidence. This helps strengthen the credibility of your disclosures and build trust with stakeholders.


     
    Our assurance process includes:


       

    • Review of ESG data and supporting documentation
    • Assessment of alignment with reporting frameworks
    • Evaluation of narrative claims and performance metrics
    • Delivery of limited or reasonable assurance statements
Third Party Verification Assurance Consultancy Sustainability Report Assurance

Net zero & ESG claims review

We assess the credibility of net zero targets, carbon neutrality statements, ESG KPIs, and supply chain claims, helping you avoid reputational risk and ensure transparency in your sustainability communications.


     
    Our review includes:


       

    • Evaluation of net zero and carbon neutrality claims
    • Assessment of ESG KPIs and supporting data
    • Review of supply chain disclosures and impact statements
    • Identification of gaps and risks in public-facing claims
Third Party Verification Assurance Consultancy Sustainability Report Assurance

Audit readiness & pre-assurance support

We help you prepare for external audits by reviewing controls, identifying gaps, gathering documentation, and training internal teams. Our support ensures your systems are well-documented, compliant, and ready for third-party review.


     
    Our service includes:


       

    • Review of controls and supporting documentation
    • Identification of gaps and improvement areas
    • Internal team training and audit preparation
Third Party Verification Assurance Consultancy Sustainability Report Assurance

Site Appraisal & Data Review

We offer impartial verification and assurance for carbon footprints, ESG disclosures, and sustainability reports, helping you build confidence in your data and demonstrate integrity in your sustainability performance.


     
    Our service includes:


       

    • Independent review of site-level data and documentation
    • Verification of carbon footprints and ESG disclosures
    • Assurance of sustainability reporting accuracy and credibility
Third Party Verification Assurance Consultancy Sustainability Report Assurance

Carbon footprint verification

We verify Scope 1, 2, and 3 emissions against GHG Protocol, ISO 14064-1, and PAS 2060. Our process includes reviewing data sources, emissions factors, methodologies, and supporting documentation to ensure accuracy and credibility.


     
    Our verification covers:


       

    • Scope 1, 2, and 3 emissions data
    • Methodologies and factor selection
    • Review of documentation and reporting standards
    • Alignment with GHG Protocol, ISO 14064-1, and PAS 2060
Third Party Verification Assurance Consultancy Sustainability Report Assurance

Sustainability report assurance

We provide limited or reasonable assurance of ESG reports, checking data accuracy, framework alignment, narrative claims, and supporting evidence. This helps strengthen the credibility of your disclosures and build trust with stakeholders.


     
    Our assurance process includes:


       

    • Review of ESG data and supporting documentation
    • Assessment of alignment with reporting frameworks
    • Evaluation of narrative claims and performance metrics
    • Delivery of limited or reasonable assurance statements
Third Party Verification Assurance Consultancy Sustainability Report Assurance

Net zero & ESG claims review

We assess the credibility of net zero targets, carbon neutrality statements, ESG KPIs, and supply chain claims, helping you avoid reputational risk and ensure transparency in your sustainability communications.


     
    Our review includes:


       

    • Evaluation of net zero and carbon neutrality claims
    • Assessment of ESG KPIs and supporting data
    • Review of supply chain disclosures and impact statements
    • Identification of gaps and risks in public-facing claims
Third Party Verification Assurance Consultancy Sustainability Report Assurance

Audit readiness & pre-assurance support

We help you prepare for external audits by reviewing controls, identifying gaps, gathering documentation, and training internal teams. Our support ensures your systems are well-documented, compliant, and ready for third-party review.


     
    Our service includes:


       

    • Review of controls and supporting documentation
    • Identification of gaps and improvement areas
    • Internal team training and audit preparation
Third Party Verification Assurance Consultancy Sustainability Report Assurance

Why Choose Arthian's Sustainability Consultants?

Independent, impartial consultants with technical and regulatory expertise

Integration

Fully integrated with geotechnical, hydrological, and ecological disciplines.

Our Experience

National experience with regional insight and regulatory familiarity.

Our Understanding

Deep understanding of planning, infrastructure, and environmental interfaces.

Results Driven

Commitment to technical rigour, clear communication, and long-term outcomes.

Frequently Asked Questions

What’s the difference between verification and assurance?

Verification reviews specific data sets (e.g. carbon footprints), while assurance evaluates broader reports or claims—including narrative and context.

Is third party verification mandatory?

It depends on the framework. CSRD requires assurance; SECR does not. Many organisations choose voluntary verification to enhance credibility.

How long does the verification process take?

Carbon footprint verification typically takes 2–6 weeks. Full report assurance may take longer depending on scope and complexity.

Can you verify data collected by another consultancy?

Yes. We provide independent verification regardless of who prepared the original data or report—and offer pre-assurance support.

Do you provide a formal assurance statement?

Yes. We issue verification or assurance statements outlining scope, methodology, and findings—suitable for inclusion in reports or disclosures.

Get in Touch

We’d love to hear from you – whether you have a question, a project in mind, want to explore job opportunities, or just want to say hello.

Contact Us
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