Official UK procurement notice
Procurement of Tank Covers
Authority: SEVERN TRENT WATER LIMITED (Public body)
What is being bought
Published requirement descriptionOverview
The Contracting Authority requires the design, supply and installation of tank cover systems for wastewater and water treatment assets.
As part of its AMP8 Net Zero Investment Programme, the Contracting Authority intends to deliver Cover and Treat solutions across approximately 23 sites (subject to change) to reduce process emissions by approximately 19,618 tCO₂e. Hafren Dyfrdwy also has an AMP8 regulatory commitment to deliver a Cover and Treat solution at one site, contributing a further reduction of approximately 411 tCO₂e.
The scope includes Activated Sludge Plant (ASP) lanes and Liquor Treatment Plant (LTP) tanks associated with wastewater and sludge treatment processes. These assets operate continuously and contain biologically active, aerated liquors that generate off-gases during normal operation.
Any proposed tank cover solution must be suitable for installation over live operational treatment assets and must not adversely affect process performance, operation, maintenance activities or access requirements.
The final number, size and location of sites may be subject to change and will be defined within the procurement documents.
Anticipated Scope of Contract
The successful suppliers will be required to design, manufacture, supply, deliver, install, test and commission impermeable tank cover systems for Activated Sludge Plants (ASPs) and Liquor Treatment Plants (LTPs).
The anticipated scope includes all activities necessary to provide a complete and operational tank cover solution, including design development, calculations, drawings, fabrication, quality assurance, delivery, installation, testing, commissioning, operation and maintenance documentation and warranties.
The successful suppliers will be expected to assess the suitability of existing tank structures to support the proposed cover system, including consideration of structural condition, load paths, connection methodology and access requirements. Intrusive investigations and structural remediation works are not currently anticipated to form part of the scope unless specifically instructed.
The successful suppliers will be required to work collaboratively with the Contracting Authority and its appointed designers to define interfaces between the tank cover system and any future extraction or treatment systems. The design and delivery of such extraction and treatment systems, including extraction fans, ductwork and treatment processes, is not expected to form part of this contract.
- How the procedure runs: Stage 1 - Pre-Qualification Questionnaire (PQQ) Interested suppliers will be required to complete a Pre-Qualification Questionnaire (PQQ) to assess their suitability to participate in the procurement process. Evaluation may include, but is not limited to, legal standing, economic and financial standing, insurance, health and safety, risk management, quality assurance, environmental management systems (EMS), corporate responsibility, social value, information security, national security requirements, electronic ordering and payment capability, and relevant experience. The Contracting Authority reserves the right to shortlist suppliers to progress to Stage 2. It is anticipated that a minimum of seven (7) suppliers will be shortlisted, although the Contracting Authority reserves the right to vary this number. Stage 2 - Request for Proposal (RFP) Shortlisted suppliers will be invited to submit detailed proposals in response to the Contracting Authority's requirements. Tender submissions will be evaluated in accordance with the award criteria and methodology set out in the tender documents. Shortlisted Suppliers will be expected to attend site visits during the RFP period. Following evaluation of the written proposals, the Contracting Authority reserves the right to shortlist suppliers to progress to subsequent stages of the procurement. Stage 3 - Presentations Following evaluation of the written RFP submissions, shortlisted suppliers may be invited to deliver presentations, demonstrations and/or participate in question-and-answer sessions. Information provided during this stage may be taken into account as part of the overall tender evaluation process. The Contracting Authority reserves the right to further shortlist participating suppliers following this stage. Stage 4 - Clarification and/or Negotiation The Contracting Authority reserves the right to conduct written and/or verbal clarification meetings and negotiations with some or all participating suppliers. Negotiations may cover all aspects of the submitted proposals. The Contracting Authority reserves the right to conduct one or more rounds of clarification and/or negotiation and may further reduce the number of suppliers participating in the process at any stage. Stage 5 - Best and Final Offer (BAFO) Following any clarification and/or negotiation stages, shortlisted suppliers may be invited to submit a Best and Final Offer (BAFO). Such submissions should reflect the outcomes of discussions held during the procurement process and represent the supplier's final tender submission. Stage 6 - Final Evaluation and Contract Award Where requested, BAFO submissions will be evaluated in accordance with the published award criteria. The Contracting Authority reserves the right to award the contract on the basis of the initial tenders received, without undertaking presentations, clarifications, negotiations or requesting BAFO submissions, where it considers this to be appropriate. The Contracting Authority further reserves the right to modify, combine, omit, repeat or introduce additional stages of the Competitive Flexible Procedure, and to reduce the number of participating suppliers at any stage, as described in the procurement documents. Further information regarding the procurement process will be provided within the relevant tender documentation issued at each stage.
CPV: Miscellaneous fabricated products and related items · Purification plant equipment · Roof · Roof frames · Roof supports · Roof works and other special trade construction works · Roofing materials · Tanks, reservoirs and containers; central-heating radiators and boilers · Water distribution and related services
How this framework works
From the published notice- Type
- Closed framework
- Call-offs
- call-offs may be awarded directly or by further competition
- Places
- up to 4 suppliers
- Framework period
- 4 yrs · up to 8 yrs from 15 Jan 2027
Published description of the framework
Please see Competitive Flexible Procedure description for the contract award process.
The Contracting Authority reserves the right to run an Expression of Interest to determine supplier's capacity in meeting the requirements. In such instance, the EOI will be issued to all Framework Agreement suppliers.
The Contracting Authority may, at its discretion, award call-off contracts of any value directly under the Framework without the requirement to conduct a mini- competition with all appointed Framework suppliers.
This may include awards made with or without a prior Expression of Interest (EOI) process. Where making a direct award, the Contracting Authority reserves the right to request a written submission from the respective Framework Supplier to support the finalisation of the call-off contract.
Where the Contracting Authority runs a mini competition, all Framework Agreement suppliers will be invited. As part of the mini competition process the Utility will issue an Instructions Briefing Pack outlining the process and how submissions will be evaluated. This may include criteria such as:
- Supplier capacity and availability to meet specified timescales
- Lead times
- Costs
The lotProcurement structure
single lot · value publishedLot #1RenewalPublished value£37,400,000
- Economic & financial standing
Please see tender documentation
- Technical & professional ability
Please see tender documentation
- Condition of participationshortlisting
The Contracting Authority envisages to shortlist the seven (7) highest ranking bidders, following the PQQ response evaluation, to progress to the next stage of the tender process.
What it takes to wini
How this buyer will score bids.
The evaluation criteria and weights exactly as published on the notice, grouped by family (price, quality, social value and so on).
Evaluation split and conditions of participation as published; the tender pack may add morei
How this buyer will score bids.
The evaluation criteria and weights exactly as published on the notice, grouped by family (price, quality, social value and so on).
Published award criteria (2)
- Quality
- Price
- Economic & financial standing
Please see tender documentation
- Technical & professional ability
Please see tender documentation
- Condition of participationshortlisting
The Contracting Authority envisages to shortlist the seven (7) highest ranking bidders, following the PQQ response evaluation, to progress to the next stage of the tender process.
- Price carries 30 of 100 points: a 10% discount moves about 3 points. The method statement decides this lot, not the discount.
- “Procurement of Tank Covers” is a framework: the contest is a place on its panel, up to 4 suppliers, not a single contract: call-offs may be direct or by further competition.
Price arithmetic assumes straight proportional scoring; the tender pack may use another formula.
Procedure terms & legal framework
From the official record- Procedure method
- Competitive flexible procedure
- Legal basis
- UKPGA · 2023/54 Procurement Act 2023
- Procurement category
- Goods
- Notice status
- Closed
- Procurement threshold
- Above threshold (FTS publication)
- Regulatory regime
- Utilities
- Commercial structure
- Framework agreement
- Who may use this agreement
- Not stated in the notice; call-off rights may be limited to the establishing authority
- Competition type
- Competitive procedure
- GPA / WTO covered
- Unspecified in notice
- Recurring procurement
- Unspecified in notice
- First published
- 16 Feb 2026, 11:44 GMT
- Last source update
- 25 Jun 2026, 08:00 BST
- Award evaluation window
- Submission end – 15 Jan 2027
- Authority reference
WS3133144934- FTS notice number
2026/S 000-059640- Latest notice
- Tender notice (UK4)
- Classification (CPV)
- Delivery area
- Official registry OCID
ocds-h6vhtk-0654b0Find a Tender
- How it runs
Stage 1 - Pre-Qualification Questionnaire (PQQ)
Interested suppliers will be required to complete a Pre-Qualification Questionnaire (PQQ) to assess their suitability to participate in the procurement process. Evaluation may include, but is not limited to, legal standing, economic and financial standing, insurance, health and safety, risk management, quality assurance, environmental management systems (EMS), corporate responsibility, social value, information security, national security requirements, electronic ordering and payment capability, and relevant experience.
The Contracting Authority reserves the right to shortlist suppliers to progress to Stage 2. It is anticipated that a minimum of seven (7) suppliers will be shortlisted, although the Contracting Authority reserves the right to vary this number.
Stage 2 - Request for Proposal (RFP)
Shortlisted suppliers will be invited to submit detailed proposals in response to the Contracting Authority's requirements. Tender submissions will be evaluated in accordance with the award criteria and methodology set out in the tender documents.
Shortlisted Suppliers will be expected to attend site visits during the RFP period.
Following evaluation of the written proposals, the Contracting Authority reserves the right to shortlist suppliers to progress to subsequent stages of the procurement.
Stage 3 - Presentations
Following evaluation of the written RFP submissions, shortlisted suppliers may be invited to deliver presentations, demonstrations and/or participate in question-and-answer sessions. Information provided during this stage may be taken into account as part of the overall tender evaluation process.
The Contracting Authority reserves the right to further shortlist participating suppliers following this stage.
Stage 4 - Clarification and/or Negotiation
The Contracting Authority reserves the right to conduct written and/or verbal clarification meetings and negotiations with some or all participating suppliers.
Negotiations may cover all aspects of the submitted proposals.
The Contracting Authority reserves the right to conduct one or more rounds of clarification and/or negotiation and may further reduce the number of suppliers participating in the process at any stage.
Stage 5 - Best and Final Offer (BAFO)
Following any clarification and/or negotiation stages, shortlisted suppliers may be invited to submit a Best and Final Offer (BAFO). Such submissions should reflect the outcomes of discussions held during the procurement process and represent the supplier's final tender submission.
Stage 6 - Final Evaluation and Contract Award
Where requested, BAFO submissions will be evaluated in accordance with the published award criteria.
The Contracting Authority reserves the right to award the contract on the basis of the initial tenders received, without undertaking presentations, clarifications, negotiations or requesting BAFO submissions, where it considers this to be appropriate.
The Contracting Authority further reserves the right to modify, combine, omit, repeat or introduce additional stages of the Competitive Flexible Procedure, and to reduce the number of participating suppliers at any stage, as described in the procurement documents.
Further information regarding the procurement process will be provided within the relevant tender documentation issued at each stage.
How it was run
Official notice- Requests to participate (first stage)
- 22 Jul 2026, 14:00 BST
- Appointment period ends
- 22 Jul 2026, 14:00 BST
- Clarification deadline
- 15 Jul 2026, 16:00 BST
- Submission channel
- Official e-sourcing portal
- Electronic submission
- Allowed
- Accepted languages
- en
portal.us.bn.cloud.ariba.com/dashboard/public/app… ↗
PQQ submissions and, for suppliers shortlisted following the PQQ stage, RFP submissions must be submitted via the Contracting Authority's SAP Ariba e-tendering system.
Please refer to the tender documentation for further instructions and information.
Timeline
16 Feb 2026 → 15 Jan 2027 · 7 dates- Planning notice published247 days ago16 Feb 2026, 11:44 GMT
- Market engagement203 days ago31 Mar 2026, 23:59 BST
STW are investigating the procurement for the supply and delivery of covers of our ASP tanks (Activated Sludge Plant).
We are keen to engage with interested suppliers to help us inform our sourcing strategy and procurement process.
Any future Tender Notice will be published and response to this pre market engagement is optional and does not contribute to any procurement process. All information gathered as part of this market engagement process will be used to inform our understanding of the market and support us in refining our requirements.
We will publish an initial questionnaire (please see link below) inviting interested suppliers to provide information on their products and services. Following review of the responses to this questionnaire we reserve the right to contact suppliers individually to discuss their responses further and explore any additional areas that may arise during the market engagement period, including testing of potential tender documentation such as specification.
forms.office.com/Pages/ResponsePage.aspx ↗
Whilst the initial market engagement period is until 31 March 2026 , we would like to hear from suppliers as soon as possible through the completion of the questionnaire (link above).
Any questions re access or completion of the questionnaire please email: [email protected]
This period has now been extended to 30th April to enable further market engagement activities. If you are interesting in learning more about this opportunity please email the above mailbox.
- Tender notice published118 days ago25 Jun 2026, 08:00 BST
- Clarification questions by97 days ago15 Jul 2026, 16:00 BST
- Admission / appointment period ends91 days ago · period end, not a bid countdown22 Jul 2026, 14:00 BST
- Today21 Oct 2026
- Contract startsin 86 days15 Jan 2027
- Award decision expected byin 87 days15 Jan 2027, 23:59 GMT
Notice history
7 events · 4 releases on Find a Tender · since 16 Feb 2026- Preliminary market engagement notice published16 Feb 2026, 11:44 GMTUK2
- Preliminary market engagement notice published16 Feb 2026, 18:09 GMTUK2
- Preliminary market engagement notice published17 Apr 2026, 14:49 BSTUK2
- Tender notice published25 Jun 2026, 08:00 BSTUK4
- Published value published: £37,400,00025 Jun 2026, 08:00 BST
- Status changed to active25 Jun 2026, 08:00 BST
- Procurement method changed25 Jun 2026, 08:00 BST
Published amendments (2)
Additional detail provided to the Engagement process.
Extension of market engagement period to 30th April 2026.
Routine re-releases (4)
- 2026-02: 1 release · 16 Feb 2026
Contracting authority & participating public bodies
Official documents & specifications (4)
Official links; attachments are not copiedNotices published for this procedure
- Tender notice Tender notice on Find a Tender
- Preliminary market engagement notice Preliminary market engagement notice on Find a Tender
- Preliminary market engagement notice Preliminary market engagement notice on Find a Tender
- Preliminary market engagement notice Preliminary market engagement notice on Find a Tender