---
title: "Where Have All the Eiders Gone? - Food Resource Availability Assessment"
ocid: "ocds-h6vhtk-05d2c4"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05d2c4"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-05d2c4.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-05d2c4.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "NATURAL ENGLAND"
published: "2025-11-18"
---

# Where Have All the Eiders Gone? - Food Resource Availability Assessment

Buyer: NATURAL ENGLAND  
Current stage: Award  
OCID: ocds-h6vhtk-05d2c4

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## Summary

The procurement process led by Natural England, a central government public authority based in London, focused on the ecological assessment titled "Where Have All the Eiders Gone? - Food Resource Availability Assessment." This project aimed to assess the availability of food resources for eiders, primarily mussels, in the Northumberland region, amid their declining numbers at both GB and England scales. The procurement stage is complete, with the contract awarded on 18th November 2025 to ENVISION MARINE LTD., a marine survey services provider. The project, under an open competition method classified as below threshold, underwent its active contract period from 7th November 2025 to 27th February 2026. The main procurement category was services, relating to marine survey services around the UKC region, and the total contract value was £19,250.

This tender presents significant opportunities for growth within businesses specialising in marine biology and environmental assessments. Firms with expertise in ecological surveys and marine life studies will find this project aligns with their core competencies, particularly SMEs like ENVISION MARINE LTD., who have the skills and experience required to safely conduct operations in specific environmental conditions. Such contracts can enhance a company's portfolio in public sector ecological projects and provide further credibility and exposure. The procurement method facilitates fair competition and encourages diverse business participation, stimulating growth and development in niche sectors focusing on environmental conservation.

## Notice

At the GB scale, eider numbers have declined by c60% over the last 25 years. At an England scale, numbers have declined by c75% over 30+ years. Action to understand the causes of these declines and, if possible, to implement measures to halt or reverse the declines is urgent. Adult eiders preferentially feed on mussel, a resource which since 2012 has declined critically in Northumberland. This suggests that environmental changes leading to loss of mussel resources on this coast may have played some part in the eiders' decline. The present study is being commissioned to provide an assessment of food availability for eiders over the winter period. Eiders preferentially feed on mussels, a resource which since 2012 has declined critically in Northumberland. However, mussel beds persist in the Teesmouth and Cleveland Coast SPA, where wintering eiders occur. The study will determine the availability of mussels and alternate food sources at five sites in the region used by eiders. Intertidal rocky reef transect surveys will be conducted during the period of lowest possible tides in November or December (contingency) 2025. The period is chosen to assess the food availability to the overwintering eiders in the region. If interested, suppliers should provide: details of the methodology and approaches proposed to deliver the requirements of this project; qualifications and experience the proposed project team; a proposed timetable for the project, risk log, mitigation actions and a Gantt; and proposed project teams' experience and qualifications for operating safely in the environment and conditions required for the project.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/074903-2025 |
| Notice type | UK7 - Contract Details Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Open |
| Procurement method details | Below threshold - open competition |
| Tender suitability | SME |
| Awardee scale | SME |
| All stages | Tender, Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 18 Nov 2025 |
| Submission deadline | 4 Nov 2025 |
| Future notice date | Not specified |
| Award date | 6 Nov 2025 |
| Contract period | 7 Nov 2025 - 27 Feb 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £20,833 |
| Lots value | £20,833 |
| Awards value | Not specified |
| Contracts value | £19,250 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NATURAL ENGLAND |
| Locality | LONDON |
| Post town | South West London |
| Postcode | SW1P 4DF |
| 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 | TLC North East (England) |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | ENVISION MARINE |

## CPV Codes

### Divisions

- 71 - Architectural, construction, engineering and inspection services

### Codes

- 71354500 - Marine survey services

## Release History

- 18 Nov 2025 at 16:00 - Award - UK7 - Contract Details Notice - https://www.find-tender.service.gov.uk/Notice/074903-2025
- 30 Oct 2025 at 10:07 - TenderUpdate - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/069627-2025
- 23 Oct 2025 at 15:13 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/067933-2025

## Documents

- https://www.find-tender.service.gov.uk/Notice/074903-2025
  18th November 2025 - Contract details notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/069627-2025
  30th October 2025 - Tender notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/067933-2025
  23rd October 2025 - Tender notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-6570
  Request for quotation.
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-6571
  Order form
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-6572
  Specification.
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-6573
  Commercial response form.
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-6814
  Clarification to bidders questions

## Notice URLs

- http://www.envision.uk.com
- 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-05d2c4. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-05d2c4.json.