Notice Information
Notice Title
SONI074 DS3 System Services - Volume Capped - Gate 14
Notice Description
Following review by the Regulatory Authorities of the TSOs' Report on Ensuring a Secure, Reliable and Efficient Power System in July 2011 the TSOs were requested by the SEM Committee to put in place a programme of work to solve the challenges associated with increased levels of penetration of variable non-synchronous renewable generation.
Lot Information
POR L1NI - Primary Operating Reserve
Primary Operating Reserve or 'POR' has the meaning given to it in the grid code
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
SOR L2NI - Secondary Operating ReserveSecondary Operating reserve or 'SOR' has the meaning given to it in the grid code
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
TOR1 L3NI - Tertiary 1 Operating ReserveTertiary 1 operating reserve or 'TOR1' has the meaning given to it in the grid code.
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
TOR2 L4NI - Tertiary 2 Operating ReserveTertiary 2 operating reserve or 'TOR2' has the meaning given to it in the grid code
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
RRD L5NI - Replacement Reserve (De-Synchronised)RR (De-synchronised)' means replacement reserve provided by the providing unit when: (i) not Synchronised to the power system in the case of a synchronous providing unit, or (ii) when connected to the power system and operating at a level less or equal to 0 MW in the case of an energy storage providing unit, or (ii) when connected to the power system in the case of a demand side unit
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
RRS L6NI - Replacement Reserve (Synchronised)RR (Synchronised)' means Replacement Reserve provided by the Providing Unit when: (i) synchronised to the power system in the case of a synchronous providing unit, or (ii) when connected to the power system and operating at a level greater than 0 MW in the case of an energy storage providing unit or power park module. II.2.5) Award criteria
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
SSRP L7NI - Steady State Reactive PowerSteady-state reactive power or 'SSRP' means reactive power capability (Leading) and reactive power capability
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
SIR L8NI - Synchronous Inertial ResponsSynchronous Inertial Response (SIR) is the kinetic energy (at a Frequency of 50 Hz) of a centrally dispatched synchronous providing unit multiplied by the SIR factor (SIRF)
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
RM1 L9NI - Ramping Margin 1 HourRamping Margin 1 is the increased MW Output and/or MW Reduction that a providing unit can provide to the company within one hour of the company issuing a dispatch instruction to a service provider and that the providing unit can maintain for a further two hours after the one hour period has elapsed. It is limited by the lowest availability in that three hour period.
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
RM3 L10NI - Ramping Margin 3 HourRamping Margin 3 is the increased MW Output and/or MW reduction that a providing unit can provide to the company within three hours of the company issuing a dispatch instruction to a service provider and that the providing unit can maintain for a further 5 hours after the 3 hour period has elapsed. It is limited by the lowest availability in that 8 hour period
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
RM8 L11NI - Ramping Margin 8 HourRamping Margin 8 is the increased MW Output and/or MW reduction that a providing unit can provide to the company within eight hours of the company issuing a dispatch instruction to a service provider and that the providing unit can maintain for a further 8 hours after the 8 hour period has elapsed. It is limited by the lowest availability in that 16 hour period.
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
FFR L12NI - Fast Frequency ResponseFast Frequency Response (FFR) is the additional MW Output or MW reduction required compared to the pre- incident MW output or MW reduction, which is fully available from a providing unit within 2 seconds after the start of an event and sustainable up to 10 seconds after the start of the event.
Renewal: Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme.
Notice Details
Publication & Lifecycle
- Open Contracting ID
- ocds-h6vhtk-05f475
- Publication Source
- Find A Tender Service
- Latest Notice
- https://www.find-tender.service.gov.uk/Notice/082303-2025
- Current Stage
- Tender
- All Stages
- Tender
Procurement Classification
- Notice Type
- UK4 - Tender Notice
- Procurement Type
- Standard
- Procurement Category
- Services
- Procurement Method
- Open
- Procurement Method Details
- Open procedure
- Tender Suitability
- SME
- Awardee Scale
- Not specified
Common Procurement Vocabulary (CPV)
- CPV Divisions
71 - Architectural, construction, engineering and inspection services
-
- CPV Codes
71314000 - Energy and related services
Notice Value(s)
- Tender Value
- £34,450,000 £10M-£100M
- Lots Value
- £34,450,000 £10M-£100M
- Awards Value
- Not specified
- Contracts Value
- Not specified
Notice Dates
- Publication Date
- 12 Dec 20252 weeks ago
- Submission Deadline
- 15 Jan 20263 weeks to go
- Future Notice Date
- Not specified
- Award Date
- Not specified
- Contract Period
- 31 Mar 2026 - 30 Sep 2026 6-12 months
- Recurrence
- Not specified
Notice Status
- Tender Status
- Active
- Lots Status
- Active
- Awards Status
- Not Specified
- Contracts Status
- Not Specified
Buyer & Supplier
Contracting Authority (Buyer)
- Main Buyer
- SONI LTD
- Contact Name
- Not specified
- Contact Email
- tenders.soni@soni.ltd.uk
- Contact Phone
- Not specified
Buyer Location
- Locality
- BELFAST
- Postcode
- BT6 9RT
- Post Town
- Northern Ireland
- Country
- Northern Ireland
-
- Major Region (ITL 1)
- TLN Northern Ireland
- Basic Region (ITL 2)
- TLN0 Northern Ireland
- Small Region (ITL 3)
- TLN0E Lisburn and Castlereagh
- Delivery Location
- TLN Northern Ireland
-
- Local Authority
- Lisburn and Castlereagh
- Electoral Ward
- Moneyreagh
- Westminster Constituency
- Belfast South and Mid Down
Further Information
Notice Documents
-
https://www.find-tender.service.gov.uk/Notice/082303-2025
12th December 2025 - Tender notice on Find a Tender
Open Contracting Data Standard (OCDS)
View full OCDS Record for this contracting process
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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},
"hasRenewal": true,
"renewal": {
"description": "Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme."
}
},
{
"id": "8",
"title": "SIR L8NI - Synchronous Inertial Respons",
"description": "Synchronous Inertial Response (SIR) is the kinetic energy (at a Frequency of 50 Hz) of a centrally dispatched synchronous providing unit multiplied by the SIR factor (SIRF)",
"status": "active",
"value": {
"amountGross": 3445000,
"amount": 2870833,
"currency": "GBP"
},
"awardCriteria": {
"weightingDescription": "Technical Compliance and Legal",
"criteria": [
{
"type": "quality",
"name": "Technical Questionnaire",
"description": "Refer to RFP"
}
]
},
"selectionCriteria": {
"criteria": [
{
"type": "economic",
"description": "Please refer to Request for Proposal"
},
{
"type": "technical",
"description": "Please refer to Technical Questionnaire"
}
]
},
"suitability": {
"sme": true
},
"contractPeriod": {
"startDate": "2026-04-01T00:00:00+01:00",
"endDate": "2026-09-30T23:59:59+01:00",
"maxExtentDate": "2026-12-31T23:59:59+00:00"
},
"hasRenewal": true,
"renewal": {
"description": "Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme."
}
},
{
"id": "9",
"title": "RM1 L9NI - Ramping Margin 1 Hour",
"description": "Ramping Margin 1 is the increased MW Output and/or MW Reduction that a providing unit can provide to the company within one hour of the company issuing a dispatch instruction to a service provider and that the providing unit can maintain for a further two hours after the one hour period has elapsed. It is limited by the lowest availability in that three hour period.",
"status": "active",
"value": {
"amountGross": 3445000,
"amount": 2870833,
"currency": "GBP"
},
"awardCriteria": {
"weightingDescription": "Technical Compliance and Legal",
"criteria": [
{
"type": "quality",
"name": "Technical Questionnaire",
"description": "Refer to RFP"
},
{
"type": "quality",
"name": "Legal",
"description": "Refer to RFP"
}
]
},
"selectionCriteria": {
"criteria": [
{
"type": "economic",
"description": "Please refer to Request for Proposal"
},
{
"type": "technical",
"description": "Please refer to Technical Questionnaire"
}
]
},
"suitability": {
"sme": true
},
"contractPeriod": {
"startDate": "2026-04-01T00:00:00+01:00",
"endDate": "2026-09-30T23:59:59+01:00",
"maxExtentDate": "2026-12-31T23:59:59+00:00"
},
"hasRenewal": true,
"renewal": {
"description": "Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme."
}
},
{
"id": "10",
"title": "RM3 L10NI - Ramping Margin 3 Hour",
"description": "Ramping Margin 3 is the increased MW Output and/or MW reduction that a providing unit can provide to the company within three hours of the company issuing a dispatch instruction to a service provider and that the providing unit can maintain for a further 5 hours after the 3 hour period has elapsed. It is limited by the lowest availability in that 8 hour period",
"status": "active",
"value": {
"amountGross": 3445000,
"amount": 2870833,
"currency": "GBP"
},
"awardCriteria": {
"weightingDescription": "Technical Compliance and Legal",
"criteria": [
{
"type": "quality",
"name": "Technical Questionnaire",
"description": "Refer to RFP"
},
{
"type": "quality",
"name": "Legal",
"description": "Refer to RFP"
}
]
},
"selectionCriteria": {
"criteria": [
{
"type": "economic",
"description": "Please refer to Request for Proposal"
},
{
"type": "technical",
"description": "Please refer to Technical Questionnaire"
}
]
},
"suitability": {
"sme": true
},
"contractPeriod": {
"startDate": "2026-04-01T00:00:00+01:00",
"endDate": "2026-09-30T23:59:59+01:00",
"maxExtentDate": "2026-12-31T23:59:59+00:00"
},
"hasRenewal": true,
"renewal": {
"description": "Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme."
}
},
{
"id": "11",
"title": "RM8 L11NI - Ramping Margin 8 Hour",
"description": "Ramping Margin 8 is the increased MW Output and/or MW reduction that a providing unit can provide to the company within eight hours of the company issuing a dispatch instruction to a service provider and that the providing unit can maintain for a further 8 hours after the 8 hour period has elapsed. It is limited by the lowest availability in that 16 hour period.",
"status": "active",
"value": {
"amountGross": 3445000,
"amount": 2870833,
"currency": "GBP"
},
"awardCriteria": {
"weightingDescription": "Technical Compliance and Legal",
"criteria": [
{
"type": "quality",
"name": "Technical Questionnaire",
"description": "Refer to RFP"
},
{
"type": "quality",
"name": "Legal",
"description": "Refer to RFP"
}
]
},
"selectionCriteria": {
"criteria": [
{
"type": "economic",
"description": "Please refer to Request for Proposal"
},
{
"type": "technical",
"description": "Please refer to Technical Questionnaire"
}
]
},
"suitability": {
"sme": true
},
"contractPeriod": {
"startDate": "2026-04-01T00:00:00+01:00",
"endDate": "2026-09-30T23:59:59+01:00",
"maxExtentDate": "2026-12-31T23:59:59+00:00"
},
"hasRenewal": true,
"renewal": {
"description": "Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme."
}
},
{
"id": "12",
"title": "FFR L12NI - Fast Frequency Response",
"description": "Fast Frequency Response (FFR) is the additional MW Output or MW reduction required compared to the pre- incident MW output or MW reduction, which is fully available from a providing unit within 2 seconds after the start of an event and sustainable up to 10 seconds after the start of the event.",
"status": "active",
"value": {
"amountGross": 3445004,
"amount": 2870837,
"currency": "GBP"
},
"awardCriteria": {
"weightingDescription": "Technical Compliance and Legal",
"criteria": [
{
"type": "quality",
"name": "Technical Questionnaire",
"description": "Refer to RFP"
},
{
"type": "quality",
"name": "Legal",
"description": "Refer to RFP"
}
]
},
"selectionCriteria": {
"criteria": [
{
"type": "economic",
"description": "Please refer to Request for Proposal"
},
{
"type": "technical",
"description": "Please refer to Technical Questionnaire"
}
]
},
"suitability": {
"sme": true
},
"contractPeriod": {
"startDate": "2026-04-01T00:00:00+01:00",
"endDate": "2026-09-30T23:59:59+01:00",
"maxExtentDate": "2026-12-31T23:59:59+00:00"
},
"hasRenewal": true,
"renewal": {
"description": "Option for TSO to extend the term of its Contract in respect of any or all of its applicable Lots in certain defined cases, at the discretion of the Contracting Entity. This option might apply where, for instance, there is a delay in completing the procurement for any subsequent phases envisaged under the DS3 Programme."
}
}
],
"lotDetails": {
"awardCriteriaDetails": "Based on responses to Technical Questionnaire"
},
"documents": [
{
"id": "conflictOfInterest",
"documentType": "conflictOfInterest",
"description": "Not published"
},
{
"id": "082303-2025",
"documentType": "tenderNotice",
"noticeType": "UK4",
"description": "Tender notice on Find a Tender",
"url": "https://www.find-tender.service.gov.uk/Notice/082303-2025",
"datePublished": "2025-12-12T09:47:08Z",
"format": "text/html"
}
]
},
"language": "en"
}