---
title: "715862521 - Hydraulics Supply and Support (HSS) - UK2"
ocid: "ocds-h6vhtk-06aa9a"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06aa9a"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-06aa9a.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-06aa9a.json"
source: "Find A Tender Service"
current_stage: "Planning"
buyer: "SUBMARINE DELIVERY AGENCY"
published: "2026-07-29"
---

# 715862521 - Hydraulics Supply and Support (HSS) - UK2

Buyer: SUBMARINE DELIVERY AGENCY  
Current stage: Planning  
OCID: ocds-h6vhtk-06aa9a

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## Summary

The Submarine Delivery Agency (SDA), a central government public authority based in Bristol, United Kingdom, is currently in the planning stage for its procurement process titled "Hydraulics Supply and Support (HSS) - UK2". This opportunity is focused within the defence and security industry category, specifically dealing with hydraulic support for Royal Navy submarines and surface ships. The procurement is still in the planning phase with a market engagement notice recently published on 29th July 2026. Interested suppliers are invited to partake in preliminary market engagement to assess solutions, with the Request for Information (RFI) scheduled to close on 19th August 2026. The estimated gross value of the contract is £55,000,000, and it is expected to begin in March 2028 and conclude by March 2033, though it has a potential extension to 2038. 

This tender presents significant opportunities for companies specializing in hydraulic systems and defence support services. With the project’s estimated budget and duration, it supports small and medium enterprises (SMEs) by encouraging participation due to the suitability criteria offering opportunities in general and specialized hydraulic equipment for submarines. The engagement to provide both goods and services in the maintenance and support of critical naval operations could facilitate business growth by securing a role in supporting the UK's national defence infrastructure. Firms familiar with defence security protocols and experienced in comprehensive service management, supply support, and equipment maintenance will be particularly well-suited to compete in this upcoming contract opportunity. Interested parties are encouraged to contribute to the RFI process to better position themselves for any future tendering activities.

## Notice

The HSS requirement supports hydraulic equipment fitted across Royal Navy submarine and surface ship platforms. These systems perform mission-critical and safety-critical functions supporting platform availability, operational effectiveness and Continuous At Sea Deterrence (CASD). The requirement includes support to: (a) Hydraulic system Valves, Accumulators and Filters. (b) Hydraulic system mechanical support services e.g. Mib Winch. (c) Hydraulic system miscellaneous mechanical spares e.g. gaskets, O-rings. Support is required for both general hydraulic equipment and designated first-level hydraulic equipment across the in-service fleet. Interested parties are to note: * This Preliminary Market Engagement Notice is invite suppliers to take part in market engagement for this potential future requirement and is not a formal request for Expressions of Interest (EOI) nor a commitment to run a procurement exercise. * The publication date of the UK 4 Tender Notice, Contract start date and Contract end date are an estimate and is still subject to change.

### Planning Information

The Submarine Delivery Group (SDG), Platform Equipment Delivery Team (PEDT), has an enduring requirement to provide Hydraulics Supply & Support (HSS) services across all UK submarines and selected Royal Navy Surface Ship hydraulic systems. The requirement encompasses the provision of service management, supply support, equipment upkeep, obsolescence management & PDS tasking activities necessary to maintain operational capability and equipment availability. Support is required for both general hydraulic equipment and designated first-level hydraulic equipment across the in-service fleet. 
The Authority seeks to assess the commercial market’s capability to tender solutions that meet this future procurement need. This process will enable the Authority to plan activities effectively and may assist in shaping the future procurement strategy and defining the scope of the requirement.
For further details, please refer to the attached Request for Information (RFI) which is included as part of the Opportunity Listing on the Defence Sourcing Portal (DSP). The Authority welcomes responses to the questions outlined in Annex A. Organisations interested in providing information are invited to contact Martha Frankland at martha.frankland100@mod.gov.uk
The RFI closure date is 19/08/2026 2026 at 23:59.
This RFI does not represent a contractual commitment of any kind at this time. Any work undergone as a result of this request is done so at your organisations risk. This RFI is not a commitment by the UK Ministry of Defence to place an order or a Tender in the future.
Link to DSP notice: https://contracts.mod.uk/esop/guest/go/opportunity/detail?opportunityId=61333

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/071845-2026 |
| Notice type | UK2 - Preliminary Market Engagement Notice |
| Procurement type | Standard |
| Procurement category | Goods |
| Procurement method | Not Specified |
| Procurement method details | Not specified |
| Tender suitability | SME |
| Awardee scale | Not specified |
| All stages | Planning |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 29 Jul 2026 |
| Submission deadline | Not specified |
| Future notice date | 4 Feb 2027 |
| Award date | Not specified |
| Contract period | 15 Mar 2028 - 14 Mar 2033 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £45,833,333 |
| 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 | SUBMARINE DELIVERY AGENCY |
| Locality | BRISTOL |
| Post town | Bristol |
| Postcode | BS34 8JH |
| Country | England |
| ITL 1 | TLK South West (England) |
| ITL 2 | TLK5 West of England |
| ITL 3 | TLK52 Bath & North East Somerset and South Gloucestershire |
| Local authority | South Gloucestershire |
| Electoral ward | Stoke Park & Cheswick |
| Westminster constituency | Filton and Bradley Stoke |
| Delivery location | Not specified |

## CPV Codes

### Divisions

- 35 - Security, fire-fighting, police and defence equipment
- 42 - Industrial machinery
- 43 - Machinery for mining, quarrying, construction equipment

### Codes

- 35512000 - Submarines
- 35512100 - Strategic submarine nuclear fuelled
- 35512200 - Attack submarine nuclear fuelled
- 42132120 - Hydraulic valve actuators
- 43328100 - Hydraulic equipment

## Release History

- 29 Jul 2026 at 14:57 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/071845-2026
- 1 Jun 2026 at 14:37 - Planning - UK1 - Pipeline Notice - https://www.find-tender.service.gov.uk/Notice/051506-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/071845-2026
  29th July 2026 - Preliminary market engagement notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/051506-2026
  1st June 2026 - Pipeline notice on Find a Tender

## Notice URLs

- https://contracts.mod.uk/esop/guest/go/opportunity/detail?opportunityId=61333
- https://www.gov.uk/government/organisations/submarine-delivery-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-06aa9a. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-06aa9a.json.