BidSonarBidSonar
ContractsGrantsOrganisationsSectors
BidSonarBidSonar·Built by Hypership
SourcesBrandPrivacyTermsCookies

BidSonar is an independent index of public-sector opportunities. We aggregate data from official sources and are not affiliated with any procurement body. Data is licensed under the Open Government Licence v3.0 and the EU TED reuse notice.

    ContractsModel Assurance Testing Support
    Awarded contract

    Model Assurance Testing Support

    Awarded
    £336k
    Published 26 Aug 2026

    Hartley McMaster Limited will provide specialist model assurance and testing support to the National Audit Office from January 2027 for three years, with a potential one-year extension, valued at £336,000 including VAT.

    🇬🇧United KingdomPublished 26 Aug 2026· 2 months agoviaContracts Finder
    Awarded
    £336k
    Published 26 Aug 2026

    Decision brief

    4 fields
    • Contract value
      £336,000
      Pounds sterling
    • Tender closed
      1 Jun 2026
      5 months ago
    • Sector
      Professional Services
      Browse related listings
    • Location
      🇬🇧United Kingdom

    Suppliers

    1 supplier
    • HM
      HARTLEY MCMASTER LIMITED
    Lead contractor

    Lifecycle

    Awarded

    Contract awarded. Originally published 2 months ago.

    26 Aug 2026Today1 Jun 2026

    Brief

    The National Audit Office (NAO) has awarded a contract to Hartley McMaster Limited through the Crown Commercial Services GCloud 14 framework to provide specialist model assurance support services. The supplier will oversee and lead comprehensive testing of a subset of models within the NAO's model assurance portfolio. The initial contract term runs from 4 January 2027 to 3 January 2030 (three years), with an option for the NAO to extend for an additional 12 months until 3 January 2031. The total estimated contract value is £336,000 inclusive of VAT over the full four-year period. This role requires expertise in model testing, quality assurance, and portfolio management to support the NAO's critical audit functions.

    Track record

    33 awards · 30 winners
    Open field

    No single supplier dominates the field.

    In professional services, NATIONAL AUDIT OFFICE has awarded 33 contracts to 30 suppliers.

    Who wins here
    1. MONTAGU EVANS LLP2× · 6%
    2. ERNST YOUNG LLP2× · 6%
    3. Bright Network (UK) LIMITED2× · 6%
    4. FORVIS MAZARS LLP1× · 3%
    5. REDACTIVE EVENTS LIMITED1× · 3%
    6. FORFRONT LIMITED1× · 3%

    +24 more suppliers

    Across professional services, the most active winners are REED SPECIALIST RECRUITMENT LIMITED, KPMG LLP, PROMAR INTERNATIONAL — the field to beat, or your route in as a partner.

    More from NATIONAL AUDIT OFFICE

    4 listingsView all →
    AwardedProfessional Services🇬🇧United Kingdom

    Advertising and Social Media Campaign for NAO Graduate Scheme through Bright Network

    NAO seeks targeted advertising and social media campaign through Bright Network to promote its Graduate ACA Training Scheme to 1.5 million members over 12 months for £24,000.

    £24,000NATIONAL AUDIT OFFICE
    Published 4 Nov 2026
    AwardedIT & Software🇬🇧United Kingdom

    Microsoft Power Platform and APEX Technical Support Services

    The National Audit Office contracted Robiquity Limited to provide technical assurance and specialist support for Microsoft Power Platform and APEX solution, valued at £200,000 over up to four years.

    £200,000NATIONAL AUDIT OFFICE
    Published 3 Nov 2026
    AwardedIT & Software🇬🇧United Kingdom

    Microsoft Power Platform and APEX Technical Support Services

    Technical assurance and specialist support contract for Microsoft Power Platform and APEX solution, valued at £200,000 over up to four years through the Crown Commercial Service G-Cloud 14 framework.

    £200,000NATIONAL AUDIT OFFICE
    Published 3 Nov 2026
    AwardedIT & Software🇬🇧United Kingdom

    Government Contracts and Spending Database Access

    The NAO contracted Tussell Limited to provide a government contracts and spending database covering historical data from 2016, current contracts, and future pipeline information through 2028.

    £27,000NATIONAL AUDIT OFFICE
    Published 28 Oct 2026

    Open in Professional Services

    4 open listingsView all →
    OpenProfessional Services🇬🇧United Kingdom

    Barristers Framework Agreement for London Boroughs' Legal Alliance 2028

    The London Boroughs' Legal Alliance seeks qualified barristers and advocates to join a multi-authority preferred supplier framework agreement for 2028.

    £140,000,000indicativeLondon Borough of Richmond Upon Thames
    Published 4 Nov 2026
    Professional Services🇬🇧United Kingdom

    Certification Services for Northern Ireland Beef and Lamb Farm Quality Assurance Scheme

    LMC seeks a certification service provider for the Northern Ireland Beef and Lamb Farm Quality Assurance Scheme, serving 11,422 participants from April 2027 onwards.

    est.£10,843,438The Livestock and Meat Commission for Northern Ireland
    Published 4 Nov 2026
    Professional Services🇬🇧United Kingdom

    LED Screens, Staging, PA and Lighting Equipment Supply for Derby LIVE Events

    Supply, installation and removal of staging, LED screens, PA and lighting equipment for Derby LIVE Events - reserved for Derby City-based suppliers with substantive local operations.

    est.£95,000DERBY CITY COUNCIL
    Published 4 Nov 2026
    Professional Services🇬🇧United Kingdom

    Social Return on Investment Analysis for UK Media Literacy

    Commission an SROI analysis to quantify the economic and social value of media literacy investment across the UK, with findings for policy and stakeholder dissemination.

    est.£120,833OFCOM
    Published 4 Nov 2026
    Take action
    View on sourceContracts Finder

    Award notice and full record on the publisher's site

    Publisher
    UK Cabinet Office
    Licence
    OGL v3.0
    Source
    contractsfinder.service.gov.uk
    Record ID
    ac06dc1e-2908-4a2f-8b6b-286917e5d412-912158

    Your fit

    Could you win the next one?

    This went to HARTLEY MCMASTER LIMITED. Sonar reads NATIONAL AUDIT OFFICE's work like this against your business — who holds it, and whether you could compete or partner next time.

    Check my fit

    Free · Matches every Monday

    NA
    Buyer
    NATIONAL AUDIT OFFICE
    Sector
    Professional Services