
14 October 2025
Simply Certification welcomes the publication of the National Audit Office’s (NAO) independent review into energy efficiency installations delivered under the Energy Company Obligation (ECO) scheme.
We are pleased to see that a thorough and impartial assessment has been carried out, highlighting areas where failings have occurred across External Wall Insulation (EWI) and Internal Wall Insulation (IWI) installations.
While Simply Certification does not act as a guardian of ECO contract compliance, our role as an independent Certification Body is to certify installers for PAS 2030 through the application of PAS 2031 — the standard that defines how certification bodies must operate to ensure competence and compliance.
Since October 2024, we have worked closely with industry stakeholders to support ongoing investigations into the high number of installation failings identified under ECO and GBIS.
The NAO report acknowledged that:
“Certification bodies conducted the amount of audits they were asked to by the relevant standard and based on the information that they had, they did not have visibility of the full level of projects completed. The level expected by the standard was not based on a clear understanding of the risk and risk appetite, and it was possible for installers to game the system to reduce the level of audit they experienced.”
— National Audit Office
Importantly, the measures Simply Certification has implemented to strengthen assurance, transparency, and consumer protection were introduced prior to the publication of the NAO findings.
Key Improvements Implemented by Simply Certification
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Enhanced Data Transparency: Installation data is now captured directly through Simply Certification’s own systems, with TrustMark data used as a secondary validation check.
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Investment in Infrastructure: Over £70,000 has been invested in a new operational platform to improve visibility, communication, and efficiency throughout the certification process.
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Launch of the SurePath Scheme: A pioneering initiative that ensures home remediation where an installer fails to respond or resolve an identified issue.
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Expanded Inspection Capacity: Increased resourcing now enables Simply Certification to complete up to 10,000 technical inspections per year across the UK — a figure that will continue to grow as more certification holders join our scheme.
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Cross-Certification Collaboration: Working closely with other Certification Bodies to prevent dual certification and “cert-hopping,” ensuring greater accountability and consistency across the sector.
Statement from Alexandra Stobbs, Managing Director of Simply Certification
“We welcome the findings of the National Audit Office and recognise the importance of this review in strengthening the industry’s approach to quality assurance.
Certification Bodies like Simply Certification have always audited against recognised standards, not contractual frameworks — and well before this report, we had already implemented stronger systems, data controls, and risk-based auditing to improve visibility and outcomes.
By working collaboratively with other Certification Bodies, we’re closing long-standing gaps in the system and helping to ensure that consumer protection and installer accountability sit at the heart of the certification process.”
Simply Certification remains fully committed to driving higher standards, transparency, and confidence across the energy efficiency and construction sectors.
For further information, please contact hello@simplycertification.co.uk.










