← Back to search results

ClosedFind a Tender · tender

Financial Audit Services

Buyer: NATIONAL ENERGY SYSTEM OPERATOR LIMITED →

Participate on ariba.com ↗External submission platform

BuyerNATIONAL ENERGY SYSTEM OPERATOR LIMITED
StatusClosed
Deadline11 Mar 2025
Value£5,000,000
Published5 Mar 2025

What is being bought

National Energy System Operator (NESO) makes sure that Great Britain has the essential energy it needs by ensuring supply meets demand every second of every day. The UK's 2023 Energy Act established an independent system planner and operator to help accelerate Great Britain's energy transition; creating NESO. NESO is built on our previous experience as the National Grid Electricity System Operator (ESO), where we had extensive expertise in balancing electricity supply and demand 24/7, whilst making sure the networks we operated and the markets we served were prepared for the future. NESO was sold by National Grid to the UK Government on 1st October 2024 , becoming a public sector organisation from this date. We require comprehensive financial audit services compliant with International Standards of Supreme Audit Institutions (ISSAI). The objective is to ensure NESO's financial, performance, and regulatory operations are conducted with transparency, accountability, and efficiency. This specification provides the framework for the required audit services, including scope, planning, reporting, accountability, and SLAs. Scope of Services The audit firm will be responsible for delivering the following detailed services: Financial Audit o Provide reasonable assurance over NESO's financial records in accordance with applicable accounting standards (IFRS ). o Verify that financial statements are free from material misstatements due to fraud, error, or irregularities. o Evaluate internal financial controls, focusing on risks associated with financial misreporting, operational inefficiencies, or compliance failures. o Provide an audit opinion on the true and fair representation of NESO's financial position, performance, and cash flow. o Conduct testing of key accounts to provide reasonable assurance over the financial assertions. o Update NESO leadership and Audit & Risk Committee (ARC) regarding relevant changes in legislation and regulation. o Report on external audit progress to NESO leadership, including attendance at bi-monthly ARC meetings and other board or committee meetings as required. o Provide guidance to NESO leadership in particular the Chief Financial Officer (CFO), chair of ARC, director of financial control, and the accounting & reporting lead on accounting and financial matters. o Liaise and coordinate with the CFO, director of financial control and accounting & reporting lead via a monthly progress meeting to ensure full exchange of information. o Produce an annual SOC1 report evaluating the effectiveness of NESO financial controls in relation to transmission revenue charging, for external distribution to UK transmission owners, including National Grid Electricity Transmission (NGET).

Delivery location

UK

Categories

Financial auditing services 79212100

Lot details

Lot 1

NESO was sold by National Grid to the UK Government on 1st October 2024 , becoming a public sector organisation from this date. We require comprehensive financial audit services compliant with International Standards of Supreme Audit Institutions (ISSAI). The objective is to ensure NESO's financial, performance, and regulatory operations are conducted with transparency, accountability, and efficiency. This specification provides the framework for the required audit services, including scope, planning, reporting, accountability, and SLAs. ________________________________________ 4. Scope of Services (Detailed) The audit firm is responsible for delivering the following detailed services: Financial Audit o Provide reasonable assurance over NESO's financial records in accordance with applicable accounting standards (IFRS ). o Verify that financial statements are free from material misstatements due to fraud, error, or irregularities. o Evaluate internal financial controls, focusing on risks associated with financial misreporting, operational inefficiencies, or compliance failures. o Provide an audit opinion on the true and fair representation of NESO's financial position, performance, and cash flow. o Conduct testing of key accounts to provide reasonable assurance over the financial assertions. o Update NESO leadership and Audit & Risk Committee (ARC) regarding relevant changes in legislation and regulation. o Report on external audit progress to NESO leadership, including attendance at bi-monthly ARC meetings and other board or committee meetings as required. o Provide guidance to NESO leadership in particular the Chief Financial Officer (CFO), chair of ARC, director of financial control, and the accounting & reporting lead on accounting and financial matters. o Liaise and coordinate with the CFO, director of financial control and accounting & reporting lead via a monthly progress meeting to ensure full exchange of information. o Produce an annual SOC1 report evaluating the effectiveness of NESO financial controls in relation to transmission revenue charging, for external distribution to UK transmission owners, including National Grid Electricity Transmission (NGET).

Statusactive

What is included

ItemCategoryQuantity
1Not publishedNot published

Comparable-procurement analytics

Benchmarked against retained Find a Tender procedures with CPV division 79. The category anchor is Financial auditing services (79212100); this is a deliberately broad market comparator. The comparison is shown at several levels rather than pretending one company or region is always the best benchmark.

Comparison setProceduresReported bids per procedureNamed award suppliersPrice evidence
Market: CPV division 7913,7414 median · 30.9 average (5,804 of 13,741 with a bid count)3.2 average (6,509 of 13,741 with named award suppliers)1 comparable price pairs
Same buyer0Not publishedNot publishedNot published
Delivery region: UK3,8144 median · 60.1 average (1,524 of 3,814 with a bid count)5.1 average (1,811 of 3,814 with named award suppliers)Not published
Similar published value (0.5×–2×)7073 median · 9 average (10 of 707 with a bid count)1.9 average (10 of 707 with named award suppliers)1 comparable price pairs

“Reported bids” is an official aggregate, sometimes reported per lot; it is the closest available competition measure. “Named award suppliers” are winners, not all applicants.

Price-outcome signal

Not enough comparable procedures currently publish both a GBP tender value and a usable lowest-valid-bid value to calculate a responsible price-reduction benchmark. Tenderline deliberately does not infer a saving from named award suppliers or from missing award values.

Procurement strategy & market signals

Framework agreementNot published
Dynamic purchasing systemNot published
Competitive procurementNot published
Recurring requirementNo
Procurement method rationaleNot published
Rationale classificationsNot published
Special regimeNot published
Covered byNot published
Submission policyNot published
Selection criteriaNot published
Risk detailsNot published

Planning & early market engagement

BudgetNot published
No-engagement rationaleNot published
Planning documents0
Planning milestones0

No planning milestones published.

Related procurements

No linked framework, prior procurement or reprocurement published.

Documents & submission route

  • economicSelectionCriteria
  • technicalSelectionCriteria

Source data inventory

Diagnostic view. “Not published” means this current release does not provide a value.

OCIDocds-h6vhtk-04e9e8
Latest release ID008106-2025
Latest release timestampWed Mar 05 2025 16:39:21 GMT+0000 (Coordinated Universal Time)
Sourcefind-a-tender
Official notice URLNot published
Tender statusactive
Procurement methodselective
Procurement method detailsNegotiated procedure with prior call for competition
Main procurement categoryservices
Above thresholdNot published
Legal basis32014L0025
Tender period: startNot published
Tender period: end2025-03-11
Expression of interest deadlineNot published
Enquiry deadlineNot published
Award period: startNot published
Award period: endNot published
Submission method detailshttps://www.ariba.com
Submission languagesen
Electronic catalogue policyNot published
Total tender value£5,000,000
Tender lots in source1
Tender items in source1
Tender documents in source2
Awards in latest release0
Contracts in latest release0
Parties in latest release2

Notice history

DateEventReference
5 Mar 2025tender008106-2025

All source data

Unmodified official OCDS data retained by Tenderline for this procurement process.

Complete current OCDS release JSON
{
  "id": "008106-2025",
  "tag": [
    "tender"
  ],
  "date": "2025-03-05T16:39:21Z",
  "ocid": "ocds-h6vhtk-04e9e8",
  "buyer": {
    "id": "GB-COH-ocds-h6vhtk-04d52d",
    "name": "NATIONAL ENERGY SYSTEM OPERATOR LIMITED"
  },
  "tender": {
    "id": "ocds-h6vhtk-04e9e8",
    "lots": [
      {
        "id": "1",
        "status": "active",
        "options": {
          "description": "Extension would be within the allowable regulations only"
        },
        "hasOptions": true,
        "hasRenewal": false,
        "description": "NESO was sold by National Grid to the UK Government on 1st October 2024 , becoming a public sector organisation from this date. We require comprehensive financial audit services compliant with International Standards of Supreme Audit Institutions (ISSAI). The objective is to ensure NESO's financial, performance, and regulatory operations are conducted with transparency, accountability, and efficiency. This specification provides the framework for the required audit services, including scope, planning, reporting, accountability, and SLAs.\n________________________________________\n4. Scope of Services (Detailed)\nThe audit firm is responsible for delivering the following detailed services:\nFinancial Audit\no Provide reasonable assurance over NESO's financial records in accordance with applicable accounting standards (IFRS ).\no Verify that financial statements are free from material misstatements due to fraud, error, or irregularities.\no Evaluate internal financial controls, focusing on risks associated with financial misreporting, operational inefficiencies, or compliance failures.\no Provide an audit opinion on the true and fair representation of NESO's financial position, performance, and cash flow.\no Conduct testing of key accounts to provide reasonable assurance over the financial assertions.\no Update NESO leadership and Audit & Risk Committee (ARC) regarding relevant changes in legislation and regulation.\no Report on external audit progress to NESO leadership, including attendance at bi-monthly ARC meetings and other board or committee meetings as required.\no Provide guidance to NESO leadership in particular the Chief Financial Officer (CFO), chair of ARC, director of financial control, and the accounting & reporting lead on accounting and financial matters.\no Liaise and coordinate with the CFO, director of financial control and accounting & reporting lead via a monthly progress meeting to ensure full exchange of information.\no Produce an annual SOC1 report evaluating the effectiveness of NESO financial controls in relation to transmission revenue charging, for external distribution to UK transmission owners, including National Grid Electricity Transmission (NGET).",
        "secondStage": {
          "maximumCandidates": 20,
          "minimumCandidates": 5
        },
        "contractPeriod": {
          "durationInDays": 1800
        },
        "submissionTerms": {
          "variantPolicy": "notAllowed"
        },
        "selectionCriteria": {
          "description": "Supplier that responded to the PIN."
        }
      }
    ],
    "items": [
      {
        "id": "1",
        "relatedLot": "1",
        "deliveryLocation": {
          "description": "UK Wide - any NESO Site"
        },
        "deliveryAddresses": [
          {
            "region": "UK"
          }
        ]
      }
    ],
    "title": "Financial Audit Services",
    "value": {
      "amount": 5000000,
      "currency": "GBP"
    },
    "status": "active",
    "documents": [
      {
        "id": "economic1",
        "documentType": "economicSelectionCriteria"
      },
      {
        "id": "technical1",
        "documentType": "technicalSelectionCriteria"
      }
    ],
    "legalBasis": {
      "id": "32014L0025",
      "scheme": "CELEX"
    },
    "description": "National Energy System Operator (NESO) makes sure that Great Britain has the essential energy it needs by ensuring supply meets demand every second of every day.\nThe UK's 2023 Energy Act established an independent system planner and operator to help accelerate Great Britain's energy transition; creating NESO.\nNESO is built on our previous experience as the National Grid Electricity System Operator (ESO), where we had extensive expertise in balancing electricity supply and demand 24/7, whilst making sure the networks we operated and the markets we served were prepared for the future.\nNESO was sold by National Grid to the UK Government on 1st October 2024 , becoming a public sector organisation from this date. We require comprehensive financial audit services compliant with International Standards of Supreme Audit Institutions (ISSAI). The objective is to ensure NESO's financial, performance, and regulatory operations are conducted with transparency, accountability, and efficiency. This specification provides the framework for the required audit services, including scope, planning, reporting, accountability, and SLAs.\nScope of Services \nThe audit firm will be responsible for delivering the following detailed services:\nFinancial Audit\no Provide reasonable assurance over NESO's financial records in accordance with applicable accounting standards (IFRS ).\no Verify that financial statements are free from material misstatements due to fraud, error, or irregularities.\no Evaluate internal financial controls, focusing on risks associated with financial misreporting, operational inefficiencies, or compliance failures.\no Provide an audit opinion on the true and fair representation of NESO's financial position, performance, and cash flow.\no Conduct testing of key accounts to provide reasonable assurance over the financial assertions.\no Update NESO leadership and Audit & Risk Committee (ARC) regarding relevant changes in legislation and regulation.\no Report on external audit progress to NESO leadership, including attendance at bi-monthly ARC meetings and other board or committee meetings as required.\no Provide guidance to NESO leadership in particular the Chief Financial Officer (CFO), chair of ARC, director of financial control, and the accounting & reporting lead on accounting and financial matters.\no Liaise and coordinate with the CFO, director of financial control and accounting & reporting lead via a monthly progress meeting to ensure full exchange of information.\no Produce an annual SOC1 report evaluating the effectiveness of NESO financial controls in relation to transmission revenue charging, for external distribution to UK transmission owners, including National Grid Electricity Transmission (NGET).",
    "secondStage": {
      "invitationDate": "2025-04-01T00:00:00+01:00"
    },
    "tenderPeriod": {
      "endDate": "2025-03-11"
    },
    "contractTerms": {
      "hasElectronicPayment": true,
      "hasElectronicOrdering": true,
      "electronicInvoicingPolicy": "allowed"
    },
    "hasRecurrence": false,
    "classification": {
      "id": "79212100",
      "scheme": "CPV",
      "description": "Financial auditing services"
    },
    "submissionTerms": {
      "languages": [
        "en"
      ],
      "bidValidityPeriod": {
        "durationInDays": 180
      }
    },
    "submissionMethod": [
      "electronicSubmission"
    ],
    "procurementMethod": "selective",
    "mainProcurementCategory": "services",
    "submissionMethodDetails": "https://www.ariba.com",
    "procurementMethodDetails": "Negotiated procedure with prior call for competition"
  },
  "parties": [
    {
      "id": "GB-COH-ocds-h6vhtk-04d52d",
      "name": "NATIONAL ENERGY SYSTEM OPERATOR LIMITED",
      "roles": [
        "buyer"
      ],
      "address": {
        "region": "UKK",
        "locality": "TOWN",
        "postalCode": "POSTCODE",
        "countryName": "United Kingdom",
        "streetAddress": "ADDRESS"
      },
      "details": {
        "url": "https://www.neso.energy/",
        "classifications": [
          {
            "id": "ELECTRICITY",
            "scheme": "TED_CE_ACTIVITY",
            "description": "Electricity"
          }
        ]
      },
      "identifier": {
        "id": "ocds-h6vhtk-04d52d",
        "scheme": "GB-COH",
        "legalName": "NATIONAL ENERGY SYSTEM OPERATOR LIMITED"
      },
      "contactPoint": {
        "url": "https://www.ariba.com",
        "name": "Tennille Madigan",
        "email": "tennille.madigan@nationalenergyso.com",
        "telephone": "+44 7795483583"
      }
    },
    {
      "id": "GB-FTS-139907",
      "name": "OFGEM",
      "roles": [
        "reviewBody"
      ],
      "address": {
        "locality": "London",
        "countryName": "United Kingdom"
      },
      "identifier": {
        "legalName": "OFGEM"
      }
    }
  ],
  "language": "en",
  "initiationType": "tender"
}
Complete JSON history (1 releases)
5 Mar 2025 · 008106-2025 · tender
{
  "id": "008106-2025",
  "tag": [
    "tender"
  ],
  "date": "2025-03-05T16:39:21Z",
  "ocid": "ocds-h6vhtk-04e9e8",
  "buyer": {
    "id": "GB-COH-ocds-h6vhtk-04d52d",
    "name": "NATIONAL ENERGY SYSTEM OPERATOR LIMITED"
  },
  "tender": {
    "id": "ocds-h6vhtk-04e9e8",
    "lots": [
      {
        "id": "1",
        "status": "active",
        "options": {
          "description": "Extension would be within the allowable regulations only"
        },
        "hasOptions": true,
        "hasRenewal": false,
        "description": "NESO was sold by National Grid to the UK Government on 1st October 2024 , becoming a public sector organisation from this date. We require comprehensive financial audit services compliant with International Standards of Supreme Audit Institutions (ISSAI). The objective is to ensure NESO's financial, performance, and regulatory operations are conducted with transparency, accountability, and efficiency. This specification provides the framework for the required audit services, including scope, planning, reporting, accountability, and SLAs.\n________________________________________\n4. Scope of Services (Detailed)\nThe audit firm is responsible for delivering the following detailed services:\nFinancial Audit\no Provide reasonable assurance over NESO's financial records in accordance with applicable accounting standards (IFRS ).\no Verify that financial statements are free from material misstatements due to fraud, error, or irregularities.\no Evaluate internal financial controls, focusing on risks associated with financial misreporting, operational inefficiencies, or compliance failures.\no Provide an audit opinion on the true and fair representation of NESO's financial position, performance, and cash flow.\no Conduct testing of key accounts to provide reasonable assurance over the financial assertions.\no Update NESO leadership and Audit & Risk Committee (ARC) regarding relevant changes in legislation and regulation.\no Report on external audit progress to NESO leadership, including attendance at bi-monthly ARC meetings and other board or committee meetings as required.\no Provide guidance to NESO leadership in particular the Chief Financial Officer (CFO), chair of ARC, director of financial control, and the accounting & reporting lead on accounting and financial matters.\no Liaise and coordinate with the CFO, director of financial control and accounting & reporting lead via a monthly progress meeting to ensure full exchange of information.\no Produce an annual SOC1 report evaluating the effectiveness of NESO financial controls in relation to transmission revenue charging, for external distribution to UK transmission owners, including National Grid Electricity Transmission (NGET).",
        "secondStage": {
          "maximumCandidates": 20,
          "minimumCandidates": 5
        },
        "contractPeriod": {
          "durationInDays": 1800
        },
        "submissionTerms": {
          "variantPolicy": "notAllowed"
        },
        "selectionCriteria": {
          "description": "Supplier that responded to the PIN."
        }
      }
    ],
    "items": [
      {
        "id": "1",
        "relatedLot": "1",
        "deliveryLocation": {
          "description": "UK Wide - any NESO Site"
        },
        "deliveryAddresses": [
          {
            "region": "UK"
          }
        ]
      }
    ],
    "title": "Financial Audit Services",
    "value": {
      "amount": 5000000,
      "currency": "GBP"
    },
    "status": "active",
    "documents": [
      {
        "id": "economic1",
        "documentType": "economicSelectionCriteria"
      },
      {
        "id": "technical1",
        "documentType": "technicalSelectionCriteria"
      }
    ],
    "legalBasis": {
      "id": "32014L0025",
      "scheme": "CELEX"
    },
    "description": "National Energy System Operator (NESO) makes sure that Great Britain has the essential energy it needs by ensuring supply meets demand every second of every day.\nThe UK's 2023 Energy Act established an independent system planner and operator to help accelerate Great Britain's energy transition; creating NESO.\nNESO is built on our previous experience as the National Grid Electricity System Operator (ESO), where we had extensive expertise in balancing electricity supply and demand 24/7, whilst making sure the networks we operated and the markets we served were prepared for the future.\nNESO was sold by National Grid to the UK Government on 1st October 2024 , becoming a public sector organisation from this date. We require comprehensive financial audit services compliant with International Standards of Supreme Audit Institutions (ISSAI). The objective is to ensure NESO's financial, performance, and regulatory operations are conducted with transparency, accountability, and efficiency. This specification provides the framework for the required audit services, including scope, planning, reporting, accountability, and SLAs.\nScope of Services \nThe audit firm will be responsible for delivering the following detailed services:\nFinancial Audit\no Provide reasonable assurance over NESO's financial records in accordance with applicable accounting standards (IFRS ).\no Verify that financial statements are free from material misstatements due to fraud, error, or irregularities.\no Evaluate internal financial controls, focusing on risks associated with financial misreporting, operational inefficiencies, or compliance failures.\no Provide an audit opinion on the true and fair representation of NESO's financial position, performance, and cash flow.\no Conduct testing of key accounts to provide reasonable assurance over the financial assertions.\no Update NESO leadership and Audit & Risk Committee (ARC) regarding relevant changes in legislation and regulation.\no Report on external audit progress to NESO leadership, including attendance at bi-monthly ARC meetings and other board or committee meetings as required.\no Provide guidance to NESO leadership in particular the Chief Financial Officer (CFO), chair of ARC, director of financial control, and the accounting & reporting lead on accounting and financial matters.\no Liaise and coordinate with the CFO, director of financial control and accounting & reporting lead via a monthly progress meeting to ensure full exchange of information.\no Produce an annual SOC1 report evaluating the effectiveness of NESO financial controls in relation to transmission revenue charging, for external distribution to UK transmission owners, including National Grid Electricity Transmission (NGET).",
    "secondStage": {
      "invitationDate": "2025-04-01T00:00:00+01:00"
    },
    "tenderPeriod": {
      "endDate": "2025-03-11"
    },
    "contractTerms": {
      "hasElectronicPayment": true,
      "hasElectronicOrdering": true,
      "electronicInvoicingPolicy": "allowed"
    },
    "hasRecurrence": false,
    "classification": {
      "id": "79212100",
      "scheme": "CPV",
      "description": "Financial auditing services"
    },
    "submissionTerms": {
      "languages": [
        "en"
      ],
      "bidValidityPeriod": {
        "durationInDays": 180
      }
    },
    "submissionMethod": [
      "electronicSubmission"
    ],
    "procurementMethod": "selective",
    "mainProcurementCategory": "services",
    "submissionMethodDetails": "https://www.ariba.com",
    "procurementMethodDetails": "Negotiated procedure with prior call for competition"
  },
  "parties": [
    {
      "id": "GB-COH-ocds-h6vhtk-04d52d",
      "name": "NATIONAL ENERGY SYSTEM OPERATOR LIMITED",
      "roles": [
        "buyer"
      ],
      "address": {
        "region": "UKK",
        "locality": "TOWN",
        "postalCode": "POSTCODE",
        "countryName": "United Kingdom",
        "streetAddress": "ADDRESS"
      },
      "details": {
        "url": "https://www.neso.energy/",
        "classifications": [
          {
            "id": "ELECTRICITY",
            "scheme": "TED_CE_ACTIVITY",
            "description": "Electricity"
          }
        ]
      },
      "identifier": {
        "id": "ocds-h6vhtk-04d52d",
        "scheme": "GB-COH",
        "legalName": "NATIONAL ENERGY SYSTEM OPERATOR LIMITED"
      },
      "contactPoint": {
        "url": "https://www.ariba.com",
        "name": "Tennille Madigan",
        "email": "tennille.madigan@nationalenergyso.com",
        "telephone": "+44 7795483583"
      }
    },
    {
      "id": "GB-FTS-139907",
      "name": "OFGEM",
      "roles": [
        "reviewBody"
      ],
      "address": {
        "locality": "London",
        "countryName": "United Kingdom"
      },
      "identifier": {
        "legalName": "OFGEM"
      }
    }
  ],
  "language": "en",
  "initiationType": "tender"
}