# CPT\_26\_39 Specialist model assurance support

> A sourced UK public sector contract award published by National Audit Office.

## Key facts

- Buyer: [National Audit Office](/buyers/national-audit-office/contract-awards)
- Supplier: HARTLEY MCMASTER LIMITED
- Award value: £336,000
- Tender value: £336,000
- Award date: 1 August 2026
- Published: 26 August 2026
- Contract start: 4 January 2027
- Contract end: 3 January 2031
- Stage: awarded
- Procurement category: services
- Notice ID: ac06dc1e-2908-4a2f-8b6b-286917e5d412-912158
- OCID: ocds-b5fd17-6bc5942d-7e5a-4ed2-900c-ae594f9e9562

## Description

The National Audit Office awarded a contract to Hartley McMaster Limited through the Crown Commercial Services GCloud 14 framework\. The supplier will oversee and lead the testing of a subset of models within the NAO model assurance portfolio\. The contract will commence on Monday 4 January 2027 and run for an initial period of three years until Thursday 3 January 2030\. At the NAO's discretion, the contract may be extended by up to 12 months, until Friday 3 January 2031\. The estimated contract value is £336,000 inclusive of VAT over the full four-year term\.

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## Source

[View the original notice on Contracts Finder](https://www.contractsfinder.service.gov.uk/Notice/ac06dc1e-2908-4a2f-8b6b-286917e5d412-912158)