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. In response the TSOs formally commenced the DS3 Programme in September 2011. The overall aim of the DS3 Programme is to put in place the required changes to system policies, system tools and system performance to meet the challenges of operating the electricity system in a secure manner while achieving the 2020 renewable electricity targets. A key aspect of this operational challenge is the increase of System Non- Synchronous Penetration (SNSP) from the 2011 limit of 50% to 75%.
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/027525-2026
- Current Stage
- Award
- All Stages
- Tender, Award
Procurement Classification
- Notice Type
- UK6 - Contract Award Notice
- Procurement Type
- Standard
- Procurement Category
- Services
- Procurement Method
- Open
- Procurement Method Details
- Open procedure
- Tender Suitability
- SME
- Awardee Scale
- Large
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
- £2,468,357 £1M-£10M
- Contracts Value
- Not specified
Notice Dates
- Publication Date
- 25 Mar 20261 weeks ago
- Submission Deadline
- 15 Jan 2026Expired
- Future Notice Date
- Not specified
- Award Date
- 9 Mar 20263 weeks ago
- Contract Period
- 7 Apr 2026 - 30 Sep 2026 1-6 months
- Recurrence
- Not specified
Notice Status
- Tender Status
- Complete
- Lots Status
- Complete
- Awards Status
- Active, Pending
- Contracts Status
- Not Specified
Buyer & Supplier
Contracting Authority (Buyer)
- Main Buyer
- SONI LTD
- Contact Name
- Available with D3 Tenders Premium →
- Contact Email
- Available with D3 Tenders Premium →
- Contact Phone
- Available with D3 Tenders Premium →
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/027525-2026
25th March 2026 - Contract award notice on Find a Tender -
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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},
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