---
title: "Porton - Main Plenum Replacement"
ocid: "ocds-h6vhtk-05233f"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05233f"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-05233f.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-05233f.json"
source: "Find A Tender Service"
current_stage: "Planning"
buyer: "UK HEALTH SECURITY AGENCY"
published: "2025-05-23"
---

# Porton - Main Plenum Replacement

Buyer: UK HEALTH SECURITY AGENCY  
Current stage: Planning  
OCID: ocds-h6vhtk-05233f

[View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05233f)  
[Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-05233f.json)

## Summary

The UK Health Security Agency is in the planning stage of a significant procurement titled "Porton - Main Plenum Replacement" within the mechanical engineering installation works industry. The project involves the removal and replacement of the full ventilation system in the Main Plenum Building with comprehensive asbestos controls. Located in London, the procurement process aligns with legal requirements as per the UK Public Authority Central Government standards. The contract, valued at £30 million net (£36 million gross), is set to commence on 1st October 2025 and is expected to conclude by 30th September 2027, with a possible extension until 29th September 2028. Interested parties should anticipate further notice by 28th July 2025.

This tender represents a substantial opportunity for businesses involved in mechanical engineering and installation works, particularly those experienced in large-scale infrastructure projects and asbestos management. Small and medium-sized enterprises (SMEs) are considered suitable bidders, offering a growth opportunity for businesses that can meet the technical and logistical demands of the project. Companies that can deliver robust ventilation solutions and manage complex environmental controls stand to benefit significantly from engaging with this procurement process.

## Notice

The removal and replacement of full ventilation system within the Main Plenum Building with full associated asbestos controls

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/026553-2025 |
| Notice type | UK1 - Pipeline Notice |
| Procurement type | Standard |
| Procurement category | Works |
| Procurement method | Not Specified |
| Procurement method details | Not specified |
| Tender suitability | SME |
| Awardee scale | Not specified |
| All stages | Planning |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 23 May 2025 |
| Submission deadline | Not specified |
| Future notice date | 28 Jul 2025 |
| Award date | Not specified |
| Contract period | 30 Sep 2025 - 30 Sep 2027 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £30,000,000 |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Planned |
| Lots status | Planned |
| Awards status | Not specified |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | UK HEALTH SECURITY AGENCY |
| Locality | LONDON |
| Post town | East London |
| Postcode | E14 4PU |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI4 Inner London - East |
| ITL 3 | TLI42 Tower Hamlets |
| Local authority | Tower Hamlets |
| Electoral ward | Canary Wharf |
| Westminster constituency | Poplar and Limehouse |
| Delivery location | Not specified |

## CPV Codes

### Divisions

- 45 - Construction work

### Codes

- 45351000 - Mechanical engineering installation works

## Release History

- 23 May 2025 at 13:40 - Planning - UK1 - Pipeline Notice - https://www.find-tender.service.gov.uk/Notice/026553-2025

## Documents

- https://www.find-tender.service.gov.uk/Notice/026553-2025
  23rd May 2025 - Pipeline notice on Find a Tender

## Notice URLs

- https://www.gov.uk/government/organisations/uk-health-security-agency
- 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-05233f. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-05233f.json.