This public procurement record has 4 releases in its history.

Tender

30 Jul 2026 at 08:10

Planning

12 Dec 2025 at 13:21

PlanningUpdate

24 Sep 2025 at 10:15

Planning

23 May 2025 at 11:38

Summary of the contracting process

The National Energy System Operator Limited (NESO) has announced a "Technical Consultancy Framework" as part of its active tender process, involving a multi-lot framework that includes five key disciplines ranging from engineering and technical analysis to market modelling design and economics. Based in Wokingham, UK, NESO is a public undertaking entity responsible for managing energy systems. This procurement, in the services industry category, aims to establish a framework agreement with selective procurement through a competitive, flexible procedure. Potential bidders should note key deadlines, including an expression of interest deadline set for 26 August 2026, and should ensure compliance with language and electronic submission policies detailed in the tender documentation. Successful contractors will commence work from 4 January 2027, with a contract period potentially extending until 3 January 2035.

This framework offers significant opportunities for businesses, particularly those specialising in technical consultancy and engineering services within the energy sector. With a total estimated value of £72.6 million, it represents a substantial opportunity for growth and engagement in delivering strategic solutions related to energy transition and infrastructure resilience. The tender's structured lots and the requirement for a range of technical and commercial skills make it well-suited for SMEs that can offer tailored expertise in areas like digital simulations, climate resilience, or technical assurance. Such firms can leverage this framework to collaborate with NESO in evolving energy strategies that support innovation and sustainability on a national scale.

How relevant is this notice?

Notice Title

Technical Consultancy Framework

Notice Description

Technical Consultancy Framework shall be a multi-lot framework. Works shall be awarded in line Framework Call-Off Procedure. The framework shall consist of 5 lots covering numerous disciplines: - Engineering & Technical Analysis, - Modelling, Simulation & Analytics, - Strategic Technical Consultancy, - Technical Assurance, Safety & Quality, - Market Modelling Design & Economics. Once established works under the framework shall be awarded via a combination of competitive allocation and direct allocation.

Lot Information

Engineering & Technical Analysis

Provision advice and consulting services across various energy types in relation to engineering and technical analysis advice relevant to NESO specific requirements. Types of services required in this lot includes but is not limited to: * Asset assessment, Asset lifecycle modelling, CAPEX optimisation / investment planning & Criticality frameworks and maintenance strategy * Root-cause analysis * Risk analysis * Unit cost analysis and data * Engineering technical support & Network resilience * Problem resolution * Power system engineering analysis * Gas network hydraulic analysis * Energy Transition (Multi Energy & Net Zero)

Renewal: 1 + 1 + 1 + 1 extension provision

Modelling, Simulation & Analytics

Provision advice and consulting services in relation to the strategy formation of Modelling, Simulation & Analytics including, discovery, envisage and design stages of advice relevant to NESO specific requirements. Consultancy and advice in this area may include, but not limited to, consultancy relating to the following topics: * Power system modelling * Scenario analysis * Network & demand forecasting & planning support * Digital simulations * Nodal Plexos (or equivalent) modelling * Integrated energy system planning * Flexibility & Future System Modelling * Climate and Resilience analysis and modelling * Energy transition analysis and modelling * Decarbonisation modelling Please note; Lot 2 does not include the procurement of data models or the provision of software and services packages. Projects which require end to end solutions from strategy, discovery design & implementation will be procured via alternative routes to market.

Renewal: 1 + 1 + 1 + 1 extension provision

Strategic Technical Consultancy

Provision advice and consulting services in relation to Strategic Technical Consultancy advice relevant to NESO specific requirements. Types of services required in this lot includes but is not limited to: * Whole-system strategy * Market analysis * Technical advisory * Infrastructure and Operational optimisation * Net Zero & Energy Transition Strategy * Resilience strategy (National energy resilience planning & Security of supply strategy)

Renewal: 1 + 1 + 1 + 1 extension provision

Technical Assurance - Safety, Quality & Compliance

Provision advice and consulting services in relation to Environmental, Safety & Compliance advice relevant to NESO specific requirements. Types of services required in this lot includes but is not limited to: * Safety engineering * Quality management * Risk assessments and risk assessment methodologies * Technical policy review & drafting * Stakeholder & Policy Interface and alignment * Advisory Climate & Sustainability * Socio-economic Impact & Consumers analysis

Renewal: 1 + 1 + 1 + 1 extension provision

Market Design & Economics & Regulation

Provision advice and consulting services in relation to Market Design & Economics & Regulation advice relevant to NESO specific requirements. Types of services required in this lot includes but is not limited to: * Investment Mechanisms * Market design including wholesale Balancing and ancillary markets * Economics regulatory design * Cost of Capital Analysis * Microeconomics & Econometrics * Auction design * Cost-benefit analysis * Reliability mechanisms

Renewal: 1 + 1 + 1 + 1 extension provision

Planning Information

Objectives of the Engagement 1. Capture the expression of interest from technical consultancy providers who may wish to participate in the upcoming procurement 2. Obtain structured feedback on key aspects of the proposed procurement, including: .Scope and lotting strategy .Delivery models and ways of working .Commercial models and procurement approach Submitting your response would enable us to capture your expression of interest and help ensure the resulting framework is commercial viable, accessible and fit for purpose. Response Instructions All responses (including expression of interest) must be submitted via MS form link https://forms.office.com/e/6SMsr6CgPh by 8th January 2026, 12:00PM (BST). Completion of this form: . Registers your expression of interest . Provides an opportunity to offer feedback Engagement Method All supplier are requested to respond exclusively through the MS form. For any queries or clarifications, please reach out to NESO Procurement team via box.NESOIndirectsProcurement@neso.energy. Please note that we will not be providing any additional information on individual basis to ensure fairness and transparency. Disclaimer This is not a call for competition. Participation does not affect future tendering opportunities.

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-052235
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/071979-2026
Current Stage
Tender
All Stages
Planning, Tender

Procurement Classification

Notice Type
UK4 - Tender Notice
Procurement Type
Framework
Procurement Category
Services
Procurement Method
Selective
Procurement Method Details
Competitive flexible procedure
Tender Suitability
SME
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

71 - Architectural, construction, engineering and inspection services


CPV Codes

71621000 - Technical analysis or consultancy services

Notice Value(s)

Tender Value
£60,500,000 £10M-£100M
Lots Value
£60,500,000 £10M-£100M
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
30 Jul 20261 weeks ago
Submission Deadline
Not specified
Future Notice Date
1 Nov 2025Expired
Award Date
Not specified
Contract Period
4 Jan 2027 - 3 Jan 2031 4-5 years
Recurrence
Not specified

Notice Status

Tender Status
Active
Lots Status
Active
Awards Status
Not Specified
Contracts Status
Not Specified

Contracting Authority (Buyer)

Main Buyer
NATIONAL ENERGY SYSTEM OPERATOR LIMITED
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
WOKINGHAM
Postcode
RG41 5BN
Post Town
Reading
Country
England

Major Region (ITL 1)
TLJ South East (England)
Basic Region (ITL 2)
TLJ1 Berkshire, Buckinghamshire and Oxfordshire
Small Region (ITL 3)
TLJ16 Berkshire West
Delivery Location
Not specified

Local Authority
Wokingham
Electoral Ward
Winnersh
Westminster Constituency
Wokingham

Open Contracting Data Standard (OCDS)

View full OCDS Record for this contracting process

JSON Markdown

The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

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                                {
                                    "number": 30,
                                    "weight": "percentageExact"
                                }
                            ]
                        },
                        {
                            "type": "quality",
                            "name": "Technical",
                            "description": "The Technical criteria shall be evaluated in line with the ITT Instructions at a total percentage of 60%. The Technical assessment shall be split into two sections: General Technical Assessment: 40% Lot specific Assessment: 60%",
                            "numbers": [
                                {
                                    "number": 60,
                                    "weight": "percentageExact"
                                }
                            ]
                        },
                        {
                            "type": "quality",
                            "name": "Social Value",
                            "description": "The Social Value criteria shall be evaluated in line with the ITT Instructions at a total percentage of 10%. Further guidance on the social value model can be found at: https://www.gov.uk/government/publications/social-value-act-information-and-resources",
                            "numbers": [
                                {
                                    "number": 10,
                                    "weight": "percentageExact"
                                }
                            ]
                        }
                    ]
                },
                "selectionCriteria": {
                    "criteria": [
                        {
                            "description": "The PSQ shall be evaluated in line with the PSQ Instructions. The PSQ evaluation shall be assed in two stages: 1. Compliance to mandatory NESO specific questions (Pass/Fail) 2. Technical assessment scoring criteria of 100%. Shortlisted suppliers shall be invited to tender stage.",
                            "forReduction": true
                        }
                    ]
                },
                "suitability": {
                    "sme": true
                },
                "contractPeriod": {
                    "startDate": "2027-01-04T00:00:00Z",
                    "endDate": "2031-01-03T23:59:59Z",
                    "maxExtentDate": "2035-01-03T23:59:59Z"
                },
                "hasRenewal": true,
                "renewal": {
                    "description": "1 + 1 + 1 + 1 extension provision"
                }
            }
        ],
        "communication": {
            "futureNoticeDate": "2025-11-01T23:59:59Z"
        },
        "status": "active",
        "aboveThreshold": true,
        "procurementMethod": "selective",
        "procurementMethodDetails": "Competitive flexible procedure",
        "procedure": {
            "features": "Two stage process of PSQ and ITT into Contract Award. Requests to participate shall be provided access to the PSQ subject to agreement to NESO specific Non-Disclosure Agreement and Non-Collusion Agreement."
        },
        "specialRegime": [
            "utilities"
        ],
        "submissionMethodDetails": "The tenders shall be submitted via Ivalua. Register to Ivalua using the below link and please ensure you are registered against the 71621000 commodity code: https://www.neso.energy/suppliers For queries regarding access please use: support-neso@ivalua.com",
        "submissionTerms": {
            "electronicSubmissionPolicy": "allowed",
            "languages": [
                "en"
            ]
        },
        "expressionOfInterestDeadline": "2026-08-26T23:59:59+01:00",
        "awardPeriod": {
            "endDate": "2026-12-11T23:59:59Z"
        },
        "documents": [
            {
                "id": "conflictOfInterest",
                "documentType": "conflictOfInterest",
                "description": "Not published"
            },
            {
                "id": "071979-2026",
                "documentType": "tenderNotice",
                "noticeType": "UK4",
                "description": "Tender notice on Find a Tender",
                "url": "https://www.find-tender.service.gov.uk/Notice/071979-2026",
                "datePublished": "2026-07-30T09:10:19+01:00",
                "format": "text/html"
            }
        ]
    },
    "language": "en"
}