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715862521 - Hydraulics Supply and Support (HSS) - UK2

SUBMARINE DELIVERY AGENCY

This public procurement record has 2 releases in its history.

Planning

29 Jul 2026 at 14:57

UK2 - Preliminary Market Engagement Notice
Planning

01 Jun 2026 at 14:37

UK1 - Pipeline Notice
Summary of the contracting process

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.

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Notice Information

Notice Title

715862521 - Hydraulics Supply and Support (HSS) - UK2

Notice Description

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

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-06aa9a
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/071845-2026
Current Stage
Planning
All Stages
Planning

Procurement Classification

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

Common Procurement Vocabulary (CPV)

CPV Divisions

35 - Security, fire-fighting, police and defence equipment

42 - Industrial machinery

43 - Machinery for mining, quarrying, construction equipment

CPV Codes

35512000 - Submarines

35512100 - Strategic submarine nuclear fuelled

35512200 - Attack submarine nuclear fuelled

42132120 - Hydraulic valve actuators

43328100 - Hydraulic equipment

Notice Value(s)

Tender Value
£45,833,333 £10M-£100M
Lots Value
Not specified
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
29 Jul 20261 weeks ago
Submission Deadline
Not specified
Future Notice Date
4 Feb 20277 months to go
Award Date
Not specified
Contract Period
15 Mar 2028 - 14 Mar 2033 Over 5 years
Recurrence
Not specified

Notice Status

Tender Status
Planned
Lots Status
Planned
Awards Status
Not Specified
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
SUBMARINE DELIVERY AGENCY
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
BRISTOL
Postcode
BS34 8JH
Post Town
Bristol
Country
England
Major Region (ITL 1)
TLK South West (England)
Basic Region (ITL 2)
TLK5 West of England
Small Region (ITL 3)
TLK52 Bath & North East Somerset and South Gloucestershire
Delivery Location
Not specified
Local Authority
South Gloucestershire
Electoral Ward
Stoke Park & Cheswick
Westminster Constituency
Filton and Bradley Stoke

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

View full OCDS Record for this contracting process

JSON Markdown

The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts. 

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