---
title: "External Technical Advisory Support for Existing Nuclear Projects"
ocid: "ocds-b5fd17-c44cb26c-b1af-4837-b4b1-29a0db66411b"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-c44cb26c-b1af-4837-b4b1-29a0db66411b"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-c44cb26c-b1af-4837-b4b1-29a0db66411b.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-c44cb26c-b1af-4837-b4b1-29a0db66411b.json"
source: "Contracts Finder"
current_stage: "Tender"
buyer: "DESNZ"
published: "2025-03-06"
---

# External Technical Advisory Support for Existing Nuclear Projects

Buyer: DESNZ  
Current stage: Tender  
OCID: ocds-b5fd17-c44cb26c-b1af-4837-b4b1-29a0db66411b

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## Summary

DESNZ has initiated a procurement process for "External Technical Advisory Support for Existing Nuclear Projects," specifically related to the long-term operation of Sizewell B. This tender falls under the industry category of Technical Support Services (CPV code 71356300) and includes advisory services on project delivery and due diligence. This opportunity is available globally, including in the United Kingdom, British Oversea Territories, Channel Islands, Europe, Isle of Man, and the Rest of the World. The procurement is in the Tender stage, with the tender period ending on 3rd April 2025. The contract will commence on 2nd June 2025 and conclude on 1st June 2026. This is a mini-competition from CCS Framework RM6187 Lot 8 under the Public Contracts Regulations 2015, and suppliers have been invited to participate via the DESNZ Jaggaer portal.

This tender offers significant opportunities for businesses specialising in technical support services, particularly those experienced in the energy sector and nuclear projects. Companies of all sizes, including SMEs and VCSEs, are encouraged to compete, as the procurement process supports business growth by engaging a broad range of suppliers. Firms with expertise in providing strategic, technical advice and project management support will find this tender particularly beneficial, enabling them to leverage their skills in a high-profile infrastructure project and enhance their portfolio with government contracts.

## Notice

This tender seeks 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. This opportunity is a mini-competition from CCS Framework RM6187 Lot 8 under the Public Contracts Regulations 2015. Suppliers eligible for this opportunity have been contacted and invited to tender via the DESNZ Jaggaer portal. Only Suppliers on the framework Lot and filter that have responded to the expression of interest issued for this competition, by the stated time and date, have been invited to participate. Additional information: This opportunity is available via the DESNZ Jaggaer portal - https://beisgroup.ukp.app.jaggaer.com/esop/ogc-host/public/beisgroup/web/login.jst?VISITORID=3e09cfd4-d2be-4a75-84ce-4d881aa797e8&_ncp=1741105799430.617117-1

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/fba1ba5e-7c71-4188-b67f-51aad12c84b4 |
| Notice type | Tender Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Not Specified |
| Procurement method details | Other - CCS Framework Mini-Competition |
| Tender suitability | SME, VCSE |
| Awardee scale | Not specified |
| All stages | Tender |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 6 Mar 2025 |
| Submission deadline | 3 Apr 2025 |
| Future notice date | Not specified |
| Award date | Not specified |
| Contract period | 1 Jun 2025 - 1 Jun 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

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

## CPV Codes

### Divisions

- 71 - Architectural, construction, engineering and inspection services

### Codes

- 71356300 - Technical support services

## Release History

- 6 Mar 2025 at 11:10 - Tender - Tender Notice - https://www.contractsfinder.service.gov.uk/Notice/fba1ba5e-7c71-4188-b67f-51aad12c84b4

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/fba1ba5e-7c71-4188-b67f-51aad12c84b4
  6th March 2025 - Opportunity notice on Contracts Finder
- https://beisgroup.ukp.app.jaggaer.com/esop/ogc-host/public/beisgroup/web/login.jst?VISITORID=3e09cfd4-d2be-4a75-84ce-4d881aa797e8&_ncp=1741105799430.617117-1
  Link to DESNZ Jaggaer portal

## 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-c44cb26c-b1af-4837-b4b1-29a0db66411b. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-c44cb26c-b1af-4837-b4b1-29a0db66411b.json.