---
title: "External Technical Advisory Support for Existing Nuclear Projects"
ocid: "ocds-b5fd17-b0a2d34b-dffa-4122-86dd-a18c03e6f2d5"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-b0a2d34b-dffa-4122-86dd-a18c03e6f2d5"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-b0a2d34b-dffa-4122-86dd-a18c03e6f2d5.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-b0a2d34b-dffa-4122-86dd-a18c03e6f2d5.json"
source: "Contracts Finder"
current_stage: "Award"
buyer: "DESNZ"
published: "2025-06-09"
---

# External Technical Advisory Support for Existing Nuclear Projects

Buyer: DESNZ  
Current stage: Award  
OCID: ocds-b5fd17-b0a2d34b-dffa-4122-86dd-a18c03e6f2d5

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## Summary

The procurement process, conducted by the Department for Energy Security and Net Zero (DESNZ), is titled "External Technical Advisory Support for Existing Nuclear Projects." This procurement focuses on technical support services, particularly for the long-term operation of Sizewell B. The contract, awarded to Ove Arup & Partners Limited, has a maximum value of £1,000,000 and is initially set to run from 3rd June 2025 to 2nd June 2026, with possibilities for two additional six-month extensions. It was executed using a selective procurement method via a mini-competition under the Crown Commercial Service (CCS) Framework Management Consultancy 3 RM6187 Lot 8. The procurement, classified under the CPV code 71356300, addresses locations including the United Kingdom and globally, and is in the award stage, having been completed on 9th June 2025.

The tender provides substantial opportunities for businesses specialising in technical consultancy, making it particularly appealing to firms that offer expert advisory services in nuclear project management. With a significant contract value and the potential for extensions, this procurement is especially suitable for large enterprises but also invites participation from small and medium-sized enterprises (SMEs) and voluntary, community, and social enterprises (VCSEs). Companies capable of delivering high-quality technical support for complex projects will find this an advantageous opportunity to expand their portfolio within the prominent energy sector.

## Notice

This contract is awarded for technical services for DESNZ in relation to the long-term operation of Sizewell B. This includes providing advice on project delivery and undertaking due diligence on key information. The value and timeline for this contract is exclusive of two optional 6 month extensions with maximum contract value of 1,000,000. The initial term shall run to 02/06/2026. This opportunity was procured via a mini-competition from CCS Framework Management Consultancy 3 RM6187 Lot 8 under the Public Contracts Regulations 2015.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/fbe188b6-6a5b-4b83-b3f2-18dad65d59c0 |
| Notice type | Award Notice |
| Procurement type | Framework |
| Procurement category | Services |
| Procurement method | Selective |
| Procurement method details | Call-off from a framework agreement |
| Tender suitability | SME, VCSE |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 9 Jun 2025 |
| Submission deadline | 3 Apr 2025 |
| Future notice date | Not specified |
| Award date | 2 Jun 2025 |
| Contract period | 2 Jun 2025 - 2 Jun 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | £600,000 |
| Contracts value | Not specified |

## Status

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

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | DESNZ |
| Locality | LONDON |
| Post town | South West London |
| Postcode | SW1A 2AW |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | OVE ARUP & PARTNERS |

## CPV Codes

### Divisions

- 71 - Architectural, construction, engineering and inspection services

### Codes

- 71356300 - Technical support services

## Release History

- 9 Jun 2025 at 15:46 - Award - Award Notice - https://www.contractsfinder.service.gov.uk/Notice/fbe188b6-6a5b-4b83-b3f2-18dad65d59c0

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/fbe188b6-6a5b-4b83-b3f2-18dad65d59c0
  9th June 2025 - Awarded contract notice on Contracts Finder

## 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-b5fd17-b0a2d34b-dffa-4122-86dd-a18c03e6f2d5. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-b0a2d34b-dffa-4122-86dd-a18c03e6f2d5.json.