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Sludge Holding Tanks & Roofs

THAMES WATER UTILITIES LIMITED

This public procurement record has 3 releases in its history.

Award

16 Sep 2026 at 14:00

UK6 - Contract Award Notice
TenderUpdate

10 Dec 2025 at 10:28

UK4 - Tender Notice
Tender

17 Nov 2025 at 16:01

UK4 - Tender Notice
Summary of the contracting process

Thames Water Utilities Limited procured goods and associated installation services for wastewater treatment infrastructure. The requirement covers new sludge-holding tanks, digesters, other associated tanks and roofs, including supply, installation and commissioning. It is intended to improve asset reliability, environmental performance, regulatory compliance and future delivery capacity across Thames Water’s wastewater treatment sites. The procurement is divided into three areas: sludge-holding tanks, digesters and associated tanks with supply and installation; the same tank requirement including CDM responsibilities; and sludge-holding tank roofs, including roofs for digesters. The work is for sites in London and the South East of England. The relevant work includes sludge-storage tanks, water tanks, sewage-treatment works and construction services for treatment plants.

This procurement has been awarded through a selective competitive flexible procedure under the utilities regime, with a closed framework agreement using mini-competitions once requirements are defined. All three lots are complete. Lot 1 was awarded on 16 September 2026 to Balmoral Tanks, GEL Engineering, Stortec Engineering and Tank Consult. Lot 2 was awarded on the same date to those four suppliers. Lot 3 was awarded to Balmoral Tanks, GEL Engineering, MSD Design, Stortec Engineering and Tank Consult. Each lot has an awarded value of £0. The framework contract period is 1 November 2026 to 31 October 2029, with extensions potentially taking it to 31 October 2034. The award basis for every lot was 60% commercial quality and 40% technical price. The planned signature date was 14 October 2026.

This award shows sustained demand from Thames Water for specialist wastewater-treatment tank and covering capability, delivered through a multi-supplier framework and later mini-competitions. Businesses well placed for a future requirement would combine the design, manufacture, supply, installation and commissioning of sludge tanks, digesters, associated tanks or roofs. Relevant capability also includes managing CDM responsibilities, coordinating work at operational wastewater-treatment sites, and delivering infrastructure that supports environmental and regulatory compliance. Suppliers should be able to provide consistent, standardised solutions across multiple sites and demonstrate commercial and operational efficiency. The awarded supplier group includes several SMEs, indicating that specialist smaller firms can participate, either with a complete solution or through a focused role in tank engineering, tank manufacture, structural design, roofing, installation or commissioning.

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Notice Information

Notice Title

Sludge Holding Tanks & Roofs

Notice Description

This procurement is for the supply and commissioning of sludge tanks, digesters, other associated tanks, roofs, and related items at various wastewater treatment sites. Target Sites The procurement will cover purchase, installation and commissioning of new sludge tanks, digesters, and other associated tanks and roofs and associated items. Objectives * Compliance: Ensure compliance with legislation, improve the environmental impact of the STW and provide infrastructure which is fit for purpose. * Commercial Value: Optimise the material and delivery solution to maximise commercial efficiencies for Thames Water * Futureproofing: Implement a framework which enables Thames Water to be able toe secure the capacity it requires for future programmes of works Procurement Approach: A competitive tender process will be undertaken to appoint a supplier(s) capable of delivering the required scope. The strategy favours a supplier who can streamline delivery, ensure consistency, and maximise commercial and operational benefits. Procurement Timeline Considerations: The procurement timeline is currently under review due to strategic and regulatory reassessments at certain sites. Specifically: * A study evaluating the requirements to meet the Environment Agency IED requirements is ongoing, with outcomes expected later in the year. These findings will inform final scope and procurement readiness Expected Outcomes * Improved asset reliability and operational performance * Enhanced alignment with environmental and regulatory objectives * Commercial efficiencies through strategic sourcing and standardisation

Lot Information

Sludge Holding Tanks (including Digesters and other associated Tanks) (Supply and Installation) Sludge Holding Tanks (including Digesters and other associated Tanks) (CDM Responsibilities) Sludge Holding Tank Roofs (including Digesters)

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-05e2b6
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/087789-2026
Current Stage
Award
All Stages
Tender, Award

Procurement Classification

Notice Type
UK6 - Contract Award Notice
Procurement Type
Framework
Procurement Category
Goods
Procurement Method
Selective
Procurement Method Details
Competitive flexible procedure
Tender Suitability
SME
Awardee Scale
SME

Common Procurement Vocabulary (CPV)

CPV Divisions

44 - Construction structures and materials; auxiliary products to construction (except electric apparatus)

45 - Construction work

90 - Sewage, refuse, cleaning and environmental services

CPV Codes

44611420 - Sludge-storage tanks

44611500 - Water tanks

45232421 - Sewage treatment works

45232422 - Sludge-treatment works

45252000 - Construction works for sewage treatment plants, purification plants and refuse incineration plants

90420000 - Sewage treatment services

Notice Value(s)

Tender Value
Not specified
Lots Value
Not specified
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
16 Sep 20261 months ago
Submission Deadline
Not specified
Future Notice Date
Not specified
Award Date
16 Sep 20261 months ago
Contract Period
1 Nov 2026 - 31 Oct 2029 3-4 years
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Complete
Awards Status
Active
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
THAMES WATER UTILITIES LIMITED
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
READING
Postcode
RG1 8DB
Postcode Area
Reading
Country
England
Major Region (ITL 1)
TLJ South East (England)
Basic Region (ITL 2)
TLJ1 Berkshire, Buckinghamshire and Oxfordshire
Small Region (ITL 3)
TLJ16 Berkshire West
Delivery Location
TLI London, TLJ South East (England)
Local Authority
Reading
Electoral Ward
Thames
Westminster Constituency
Reading Central

Supplier Information

Number of Suppliers
5
Supplier Names

BALMORAL TANKS LIMITED

Gel Engineering Ltd

STORTEC ENGINEERING LIMITED

TANK CONSULT LIMITED

MSD DESIGN LIMITED

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

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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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