---
title: "Transitional Services Agreement (TSA) for Hunterston B Site Asset Management System"
ocid: "ocds-h6vhtk-05e586"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05e586"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-05e586.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-05e586.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "NUCLEAR RESTORATION SERVICES LIMITED"
published: "2025-11-24"
---

# Transitional Services Agreement (TSA) for Hunterston B Site Asset Management System

Buyer: NUCLEAR RESTORATION SERVICES LIMITED  
Current stage: Award  
OCID: ocds-h6vhtk-05e586

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## Summary

Nuclear Restoration Services Limited has entered into a direct award contract with EDF Energy Nuclear Generation Limited for a Transitional Services Agreement (TSA) concerning the Hunterston B Site Asset Management System. This contract ensures continued access to the Asset Management Suite (AMS) for post-transfer activities related to the Hunterston B site. The procurement process, categorized under software-related services, has been tagged as 'complete', and the contract commences on 1st April 2026, concluding on 31st March 2028, with options to extend it further. Located in Warrington, the buying organisation is a sub-central government public authority, indicating their commitment to overseeing efficient decommissioning of nuclear facilities. A contract award notice was published on 24th November 2025, detailing the maximum contract value of GBP 6,500,000.

This procurement provides significant opportunities for large-scale service providers, especially those experienced in software-related services for the nuclear industry. Given the contract's focus on regulatory compliance and operational continuity, companies with a robust history in managing critical infrastructure projects will find this to be a strategic growth opportunity. The direct award method, justified by EDF’s existing technical capabilities and regulatory grounding, underscores the need for specialised expertise in handling such complex and sensitive services. This opens doors for businesses that can align with stringent safety, security, and environmental compliance standards while collaborating alongside government and regulatory entities.

## Notice

Direct award of a TSA to EDF Energy Nuclear Generation Limited to ensure continued access to the Asset Management Suite (AMS) for the Hunterston B site post-transfer. The AMS is essential for regulatory compliance and operational continuity. The transparency notice Contract value is based on the maximum contract extension period, therefore not a guaranteed value of spend.

### Procurement Information

As part of the UK's nuclear decommissioning programme, Nuclear Restoration Services (NRS) will begin taking ownership of assets and the responsibility for the Advanced Gas-Cooled Reactor (AGR) sites from EDF Energy Nuclear Generation Limited (EDF). This transition, starting with Hunterston B in spring 2026, marks a key milestone in ensuring the continued safe, secure and cost-effective decommissioning of the UK's nuclear legacy. NRS is committed to transparency and collaboration throughout this transfer process, working closely with EDF, regulators and stakeholders to deliver a seamless transfer whilst maintaining the highest standards of regulatory, safety and environmental compliance. This is a direct award for the purposes of Procurement Act 2023 and is being made pursuant to Paragraph 6 of Schedule 5 to the Procurement Act 2023 NRS considers Paragraph 6 applies as the services provided by EDF Energy Nuclear Generation Limited are critical to the ongoing operation of Hunterston B and it would create significant technical difficulties and unacceptable regulatory risks to NRS for another supplier to supply the services at this time. EDF Energy Nuclear Generation Limited is neither an excluded or excludable supplier. A Contract Award Notice and Contract Details Notice will follow in accordance with Procurement Act 2023.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/076466-2025 |
| Notice type | UK6 - Contract Award Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Direct |
| Procurement method details | Direct award |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 24 Nov 2025 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 14 Nov 2025 |
| Contract period | 31 Mar 2026 - 31 Mar 2028 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | £5,200,000 |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Pending |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NUCLEAR RESTORATION SERVICES LIMITED |
| Locality | WARRINGTON |
| Post town | Warrington |
| Postcode | WA3 6GR |
| Country | England |
| ITL 1 | TLD North West (England) |
| ITL 2 | TLD6 Cheshire |
| ITL 3 | TLD61 Warrington |
| Local authority | Warrington |
| Electoral ward | Birchwood |
| Westminster constituency | Warrington North |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | EDF ENERGY NUCLEAR GENERATION |

## CPV Codes

### Divisions

- 72 - IT services: consulting, software development, Internet and support

### Codes

- 72260000 - Software-related services

## Release History

- 24 Nov 2025 at 13:21 - Award - UK6 - Contract Award Notice - https://www.find-tender.service.gov.uk/Notice/076466-2025
- 20 Nov 2025 at 13:37 - Award - UK5 - Transparency Notice - https://www.find-tender.service.gov.uk/Notice/075679-2025

## Documents

- https://www.find-tender.service.gov.uk/Notice/076466-2025
  24th November 2025 - Contract award notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/075679-2025
  20th November 2025 - Transparency notice on Find a Tender

## Notice URLs

- https://www.gov.uk/government/organisations/nuclear-restoration-services
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05e586. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-05e586.json.