NAS Certification for
Public Sector Contractors
Independent, evidence-based compliance certification for contractors working with central government, public bodies, and CCS framework supply chains.
Show government procurement teams independently reviewed evidence on the issues the Procurement Act 2023 asks them to check — misconduct, insolvency, tax, modern slavery — along with GDPR and health and safety.
Why It Matters
Public Sector Procurement Has the Highest Compliance Bar
Since 24 February 2025, central government and public body procurement teams in England, Wales and Northern Ireland buy under the Procurement Act 2023. They must check suppliers against mandatory and discretionary exclusion grounds and the central debarment list, and they remain subject to audit by the National Audit Office and parliamentary scrutiny. Their supply chains must meet the highest standards of legal compliance and ethical conduct.
NAS Gold certification provides independently assessed evidence across exclusion-ground disclosures, financial standing, Modern Slavery Act, Anti-Bribery Act and GDPR — the areas public sector buyers check at selection stage.
- Independent, evidence-based NAS certification
- Demonstrates compliance to central government and public body procurement teams
- Evidence public buyers check under the Procurement Act 2023, assessed at Gold
- Modern Slavery Act and Anti-Bribery Act compliance reviewed
- Crown Commercial Service (CCS) framework-aligned compliance evidence
- GDPR compliance for contractors accessing government data and systems
- Live digital profile shared with public sector procurement teams
- Free certificate verification on the NAS public register
What Gets Assessed
NAS reviews real evidence across core compliance areas for public sector contractors.
Health & Safety Policy
A current, signed H&S policy covering the specific risks and responsibilities of public sector building and service environments.
Procurement Act 2023
Gold reviews the evidence behind the Act's exclusion grounds — convictions, insolvency, tax, misconduct and modern slavery disclosures — plus financial standing.
Modern Slavery Act
Section 54 statement, required by the Modern Slavery Act 2015 where annual turnover is £36m or more (checked from Bronze), and a modern slavery risk policy at Gold.
Anti-Bribery Act
Anti-bribery policy, relevant to contractors paid by public bodies and government agencies (Gold).
GDPR / Data Protection
Data Protection Act 2018 and UK GDPR compliance for contractors accessing government premises, systems, or sensitive public sector data.
Insurance Evidence
Valid Employer's Liability and Public Liability insurance at appropriate levels for public sector contract work.
Choose the Right NAS Tier
Gold is recommended for public sector framework work. Silver covers environmental, quality and governance management systems.
Health and safety policy and arrangements, risk assessments and method statements, COSHH, CDM duties, training, insurance and subcontractor checks — the SSIP core criteria.
- Health & safety policy
- Risk assessments & method statements
- Training & insurance
- Public register listing
Everything in Basic plus legal identity and licences, employers’ liability insurance, data protection, equality, complaints handling, employment terms and right-to-work checks.
- Everything in Basic
- Data protection & equality
- Employers’ liability & employment checks
- Public register listing
Everything in Bronze plus environmental and waste management, quality and corrective action, governance and conflicts of interest, competition law, pensions, working time and subcontractor approval.
- Everything in Bronze
- Environmental & waste management
- Quality & governance
- Public register listing
Everything in Silver plus 13 procurement modules: financial standing, anti-bribery and integrity disclosures, tax status, cyber security, ethical supply chain, sustainability and Building Safety Act readiness.
- Everything in Silver
- 13 procurement modules
- Anti-bribery & financial standing
- Building Safety Act readiness
Frequently Asked Questions