A Trusted Source of Verified Certification
The NRTAUK Certified Business Register provides transparent, publicly accessible verification of organisations that have achieved NAS certification. Every entry represents a business that has passed our independent, evidence-based assessment process.
Whether you're a buyer verifying a supplier or a business proving your credentials, the register is the definitive source of truth.
What the Register Gives You
Three powerful reasons to use the NRTAUK certified register
Verified Status
Every listed organisation holds current, valid NAS certification — independently assessed and confirmed.
Tier Achievements
See which NAS tier (Basic, Silver, or Gold) each business has achieved and what that means.
Instant Verification
Search and filter the register by business name, sector, or location in seconds.
Verify Suppliers with Confidence
The register helps you verify supplier credentials instantly and identify certified organisations that meet your compliance requirements — at no cost.
NAS certification provides independent assurance that an organisation has demonstrated conformity with defined standards — not just self-declared compliance.