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Published 17 Aug 2026, 16:19 BST

Official UK procurement notice

Integrated Security Solutions (ISS) Works at Walham and Pentir

Official notice

Authority: NATIONAL GRID ELECTRICITY TRANSMISSION PLC (Public body)

2 lotsWorksCompetitive flexible procedureAbove thresholdUtilitiesMax 1 lot per supplier
Sectors: Radio, television, communication, telecommunication and related equipment (32)Transport Equipment & Vehicles (34)Security, fire-fighting, police and defence equipment (35)
+3 moreConstruction Materials & Prefab (44)Construction & Civil Engineering (45)Business Services & Consultancy (79)
 Delivery: UKSouth West (UKK)Wales (UKL)
Published estimate£21,000,000total for 2 lots · £25,200,000 inc. VAT · 1 value update
Submissions closed 19 Oct 2026
Lots 2max 1 won per supplier
Contract term 8 moends 14 Jan 2028 · extension options published · starts 17 May 2027

What is being bought2 lots · detail below

Published requirement description

National Grid Electricity Transmission Plc is seeking experienced and suitably qualified suppliers capable of delivering a fully integrated security solution for critical national infrastructure sites at Walham and Pentir. The requirement is divided into two separate Lots: Lot 1 (Walham) and Lot 2 (Pentir). Suppliers may submit tenders for one or both Lots; however, no supplier will be awarded more than one Lot.

Further details in relation to the scope are set out in the Instructions to Tenderers.

  • How the procedure runs: National Grid intends to conduct a Competitive Flexible Procedure with a multi-stage process. Suppliers are requested to register their interest to enable secure onboarding to National Grid's Ariba sourcing platform. Following onboarding, National Grid will issue the confidential procurement documents through Ariba, This will be a qualification questionnaire and associated documents. Suppliers must submit a completed request to participate by the deadline stated in the notice. National Grid will assess responses against the published conditions of participation and, where applicable, the published criteria for limiting supplier numbers. Suppliers selected to proceed will then be invited to submit tenders through Ariba. The multi-stage includes: Stage 1: Pre-qualification Stage 2: Request for Proposal (RFP) including evaluation, optional negotiation and resubmission Further details are included in the Instructions to Tenderers and associated procurement documents which will be issued via ARIBA.

CPV: Burglar-alarm system installation work · Closed-circuit surveillance system · Design consultancy services · Design support services · Engineering works and construction works · Fences · Fencing, railing and safety equipment installation work · Fire-alarm system installation work · Gates · Installation of telecommunications equipment · Substation construction work · Surveillance and security systems and devices

Lots and requirements (2)Procurement structure

2 lots · all with a published value (£21,000,000 together) · win at most 1 of them · same conditions of participation on every lot · same evaluation weights on every lot
Lot #1ISS Walham, Gloucestershire UK, South West 8 moPublished value£9,000,000

National Grid Electricity Transmission Plc is seeking an experienced and suitably qualified supplier capable of delivering a fully integrated security solution for a critical national infrastructure site at Walham.

Contract period: 17 May 2027 – 14 Jan 2028 (8 mo)Value: £9,000,000 exc. VAT · £10,800,000 inc. VAT
Delivery: UK, South West
Extensions: The Contract is based on the NEC4 ECC form of contract, which includes the right for the Project Manager to issue instructions to the Contractor which may have the impact of changing Key Dates/Completion Dates/the total of the Prices. Not all such instructions constitute modifications within the meaning set out in the Procurement Act 2023, but National Grid note the following Project Manager's instructions which may, depending on their content, give rise to modifications under the Procurement Act 2023 are permitted modifications (para 11 Schedule 8): • A Project Manager's instruction changing the Scope/ or the boundaries of the Site (clause 14.3, 60.1(1)); • A Project Manager's instruction to omit any part(s) of the Scope (clause Z23). The Client may also in accordance with ECI clause X22 i) issue a notice to proceed instructing the Contractor to complete Stage 2 of the works or b) issue an instruction that a notice to proceed to Stage 2 will not be issued and that the contract will terminate/ Stage 2 of the works will be removed from the Scope. This procurement is for the appointment of a contractor under NEC4 Engineering and Construction Contract Option C with Secondary Option X22 Early Contractor Involvement. The successful Contractor will initially be appointed to undertake Stage One ECI activities including design development, buildability assessments, risk reduction, programme optimisation and preparation of an open-book Target Cost. Following completion of Stage One the Client will determine whether to issue a notice to proceed for Stage Two construction activities. Progression to Stage Two is subject to agreement of the Target Cost, satisfactory risk reduction outcomes, business case approval and funding confirmation. If a notice that the works will not proceed to Stage Two is issued, the contract will terminate/Stage Two of the works will be removed from the Scope.
32235000 Closed-circuit surveillance system34928200 Fences35120000 Surveillance and security systems and devices44221300 Gates45220000 Engineering works and construction works45232220 Substation construction work
Pre-qualification & selection criteria (PQQ)3
  • Economic & financial standing

    Suppliers may be required to demonstrate that they have the legal and financial capacity to perform the contract. This will include demonstrating sufficient financial standing, taking account of the nature, complexity, value, duration and risk profile of the contract, and an ability to meet all applicable legal, statutory and regulatory requirements relevant to its performance. The detailed conditions of participation, supporting evidence requirements, assessment methodology and any applicable minimum thresholds will be set out in the Instructions to Tenderers and associated procurement documentation made available to Tenderers on ARIBA.

  • Technical & professional ability

    Suppliers will be required to demonstrate the technical ability, relevant experience, competent resources, systems and organisational capability necessary to perform the contract. This includes meeting National Grid's applicable standard supplier requirements and all project-specific technical requirements. The detailed conditions of participation, supporting evidence requirements, assessment methodology and any applicable minimum thresholds will be set out in the Instructions to Tenderers and associated procurement documentation made available to Tenderers on ARIBA. References to particular qualifications, accreditations or standards include permitted equivalents.

  • Condition of participation

    There is no maximum number of suppliers invited to participate in Stage 1: Prequalification.

    There will be a maximum number of suppliers invited to Stage 2: Request to Participate. The criteria used to select suppliers will be set out in the procurement documentation issued via Ariba. This stage will include additional pass/fail questions, followed by more detailed scored questions that will be used to assess and rank suppliers. Only the highest-ranking suppliers, up to the specified maximum number, will be invited to progress.

    shortlisting
Lot #2ISS Pentir, Gwynedd UK, Wales 8 moPublished value£12,000,000

National Grid Electricity Transmission Plc is seeking an experienced and suitably qualified supplier capable of delivering a fully integrated security solution for a critical national infrastructure site at Pentir.

Contract period: 17 May 2027 – 14 Jan 2028 (8 mo)Value: £12,000,000 exc. VAT · £14,400,000 inc. VAT
Delivery: UK, Wales
Extensions: The Contract is based on the NEC4 ECC form of contract, which includes the right for the Project Manager to issue instructions to the Contractor which may have the impact of changing Key Dates/Completion Dates/the total of the Prices. Not all such instructions constitute modifications within the meaning set out in the Procurement Act 2023, but National Grid note the following Project Manager's instructions which may, depending on their content, give rise to modifications under the Procurement Act 2023 are permitted modifications (para 11 Schedule 8): • A Project Manager's instruction changing the Scope/ or the boundaries of the Site (clause 14.3, 60.1(1)); • A Project Manager's instruction to omit any part(s) of the Scope (clause Z23). The Client may also in accordance with ECI clause X22 i) issue a notice to proceed instructing the Contractor to complete Stage 2 of the works or b) issue an instruction that a notice to proceed to Stage 2 will not be issued and that the contract will terminate/ Stage 2 of the works will be removed from the Scope. This procurement is for the appointment of a contractor under NEC4 Engineering and Construction Contract Option C with Secondary Option X22 Early Contractor Involvement. The successful Contractor will initially be appointed to undertake Stage One ECI activities including design development, buildability assessments, risk reduction, programme optimisation and preparation of an open-book Target Cost. Following completion of Stage One the Client will determine whether to issue a notice to proceed for Stage Two construction activities. Progression to Stage Two is subject to agreement of the Target Cost, satisfactory risk reduction outcomes, business case approval and funding confirmation. If a notice that the works will not proceed to Stage Two is issued, the contract will terminate/Stage Two of the works will be removed from the Scope.
32235000 Closed-circuit surveillance system34928200 Fences35120000 Surveillance and security systems and devices44221300 Gates45220000 Engineering works and construction works45232220 Substation construction work
Pre-qualification & selection criteria (PQQ)3
  • Economic & financial standing

    Suppliers may be required to demonstrate that they have the legal and financial capacity to perform the contract. This will include demonstrating sufficient financial standing, taking account of the nature, complexity, value, duration and risk profile of the contract, and an ability to meet all applicable legal, statutory and regulatory requirements relevant to its performance. The detailed conditions of participation, supporting evidence requirements, assessment methodology and any applicable minimum thresholds will be set out in the Instructions to Tenderers and associated procurement documentation made available to Tenderers on ARIBA.

  • Technical & professional ability

    Suppliers will be required to demonstrate the technical ability, relevant experience, competent resources, systems and organisational capability necessary to perform the contract. This includes meeting National Grid's applicable standard supplier requirements and all project-specific technical requirements. The detailed conditions of participation, supporting evidence requirements, assessment methodology and any applicable minimum thresholds will be set out in the Instructions to Tenderers and associated procurement documentation made available to Tenderers on ARIBA. References to particular qualifications, accreditations or standards include permitted equivalents.

  • Condition of participation

    There is no maximum number of suppliers invited to participate in Stage 1: Prequalification.

    There will be a maximum number of suppliers invited to Stage 2: Request to Participate. The criteria used to select suppliers will be set out in the procurement documentation issued via Ariba. This stage will include additional pass/fail questions, followed by more detailed scored questions that will be used to assess and rank suppliers. Only the highest-ranking suppliers, up to the specified maximum number, will be invited to progress.

    shortlisting

What it takes to win
i

How this buyer will score bids.

The evaluation criteria and weights exactly as published on the notice, grouped by family (price, quality, social value and so on).

Evaluation split and conditions of participation as published; the tender pack may add more
How bids were scored · same split on all 2 lots
Quality: 75%Price: 25%
Published sub-criteria (2)
  • Technical: 75%
  • Commercial: 25%
Published award criteria (2)
  • Technical
  • Commercial
Lot distribution rule: Tenderers may submit bids for one or both Lots; however, a Tenderer may only be awarded a maximum of one Lot. Further details of the Lot award methodology are provided within the Instructions to Tenderers.
Conditions of participation · identical on every lot3
  • Economic & financial standing

    Suppliers may be required to demonstrate that they have the legal and financial capacity to perform the contract. This will include demonstrating sufficient financial standing, taking account of the nature, complexity, value, duration and risk profile of the contract, and an ability to meet all applicable legal, statutory and regulatory requirements relevant to its performance. The detailed conditions of participation, supporting evidence requirements, assessment methodology and any applicable minimum thresholds will be set out in the Instructions to Tenderers and associated procurement documentation made available to Tenderers on ARIBA.

  • Technical & professional ability

    Suppliers will be required to demonstrate the technical ability, relevant experience, competent resources, systems and organisational capability necessary to perform the contract. This includes meeting National Grid's applicable standard supplier requirements and all project-specific technical requirements. The detailed conditions of participation, supporting evidence requirements, assessment methodology and any applicable minimum thresholds will be set out in the Instructions to Tenderers and associated procurement documentation made available to Tenderers on ARIBA. References to particular qualifications, accreditations or standards include permitted equivalents.

  • Condition of participation

    There is no maximum number of suppliers invited to participate in Stage 1: Prequalification.

    There will be a maximum number of suppliers invited to Stage 2: Request to Participate. The criteria used to select suppliers will be set out in the procurement documentation issued via Ariba. This stage will include additional pass/fail questions, followed by more detailed scored questions that will be used to assess and rank suppliers. Only the highest-ranking suppliers, up to the specified maximum number, will be invited to progress.

    shortlisting
What this means for your bid
  • Price carries 25 of 100 points: a 10% discount moves about 2.5 points. The method statement decides this lot, not the discount.

Price arithmetic assumes straight proportional scoring; the tender pack may use another formula.

Procedure terms & legal framework

From the official record
Procedure method
Competitive flexible procedure
Legal basis
UKPGA · 2023/54 Procurement Act 2023
Procurement category
Works
Notice status
Closed
Procurement threshold
Above threshold (FTS publication)
Regulatory regime
Utilities
Commercial structure
Stand-alone contract (no framework)
Competition type
Competitive procedure
GPA / WTO covered
Unspecified in notice
Recurring procurement
Unspecified in notice
First published
17 Aug 2026, 16:19 BST
Last source update
9 Oct 2026, 14:43 BST
Award evaluation window
Submission end – 1 Feb 2027
Authority reference
WS5688383780
FTS notice number
2026/S 000-095732
Latest notice
Tender notice (UK4)
Classification (CPV)
Burglar-alarm system installation workClosed-circuit surveillance systemDesign consultancy servicesDesign support servicesEngineering works and construction worksFencesFencing, railing and safety equipment installation workFire-alarm system installation workGatesInstallation of telecommunications equipment
+2 moreSubstation construction workSurveillance and security systems and devices
Delivery area
UKSouth West (UKK)Wales (UKL)
Official registry OCID
ocds-h6vhtk-06e5ea Find a Tender
How it runs

National Grid intends to conduct a Competitive Flexible Procedure with a multi-stage process. Suppliers are requested to register their interest to enable secure onboarding to National Grid's Ariba sourcing platform. Following onboarding, National Grid will issue the confidential procurement documents through Ariba, This will be a qualification questionnaire and associated documents.

Suppliers must submit a completed request to participate by the deadline stated in the notice. National Grid will assess responses against the published conditions of participation and, where applicable, the published criteria for limiting supplier numbers. Suppliers selected to proceed will then be invited to submit tenders through Ariba.

The multi-stage includes:

Stage 1: Pre-qualification

Stage 2: Request for Proposal (RFP) including evaluation, optional negotiation and resubmission

Further details are included in the Instructions to Tenderers and associated procurement documents which will be issued via ARIBA.

How it was run

Official notice
Run through: SAP Ariba · Who buys & how to bid on SAP Ariba
Electronic submission allowedLanguage: EN
Requests to participate (first stage)
19 Oct 2026, 23:59 BST
Submission deadline
19 Oct 2026, 23:59 BST
Submission channel
Official e-sourcing portal
Electronic submission
Allowed
Accepted languages
en
Detailed submission instructions & authority contactsFrom official release

Suppliers wishing to participate in this opportunity should complete the Expression of Interest link.

Suppliers are requested to register their interest 16th October 2026 to enable Ariba onboarding and secure access to the documents. Registration is an administrative access step and is not an evaluated stage. Suppliers that miss this date should contact National Grid promptly. Access may be facilitated where reasonably practicable before the submission deadline.

National Grid Procurement will issue the tender documents via SAP Ariba (service.ariba.com ↗) to those suppliers that have expressed their interest in response to this notice.

Timeline

17 Aug 2026 → 17 May 2027 · 6 dates
  1. Planning notice published65 days ago
    17 Aug 2026, 16:19 BST
  2. Next notice expected23 days ago
    28 Sept 2026, 23:59 BST
  3. Tender notice published12 days ago
    9 Oct 2026, 14:43 BST
  4. Submission deadline2 days ago
    19 Oct 2026, 23:59 BST
  5. Today
    21 Oct 2026
  6. Award decision expected byin 104 days
    1 Feb 2027, 23:59 GMT
  7. Contract startsin 207 days
    17 May 2027, 00:00 BST

Notice history

4 events · 2 releases on Find a Tender · since 17 Aug 2026
  1. Planned procurement notice published
    17 Aug 2026, 16:19 BST
    UK3
  2. Tender notice published
    9 Oct 2026, 14:43 BST
    UK4
  3. Published value published: £21,000,000
    9 Oct 2026, 14:43 BST
  4. Status changed to active
    9 Oct 2026, 14:43 BST

Contracting authority & participating public bodies

NATIONAL GRID ELECTRICITY TRANSMISSION PLC

Contracting authorityPrivate utility GB-COH: 02366977 · GB-PPON: PHHJ-6513-BWZT 1 - 3 Strand, London, London, WC2N 5EHContact name, email

Official documents & specifications (3)

Official links; attachments are not copied

Tender pack and attachments

  • Bidding documents and specifications tenderBidding documents and specificationsPlease complete the Microsoft Form to submit an Expression of Interest to receive tender notice documentation. The information collected will be used as part of the first-stage SAP Ariba onboarding process for National Grid. All fields are mandatory to facilitate Supplier Lifecyc…

Notices published for this procedure

  • Tender notice tenderTender noticeUK4Tender notice on Find a Tender
  • Planned procurement notice planningPlanned procurement noticeUK3Planned procurement notice on Find a Tender