Official UK procurement notice
CM3543 ASP Diffuser Asset Replacement
Authority: YORKSHIRE WATER SERVICES LIMITED (Public body)
What is being bought
Published requirement descriptionYorkshire Water is launching a tender notice of a procurement process for the provision of diffuser system services across its wastewater treatment asset portfolio.
The proposed framework will support the assessment, design, supply, installation, commissioning and replacement of diffuser systems within Activated Sludge Plants (ASPs) and associated wastewater treatment processes. The framework is intended to provide end-to-end scheme delivery, including condition assessment of existing assets, design of replacement or new diffuser systems, supply of diffusers and associated mechanical components, installation works, commissioning, performance validation and phased handover to maintain operational continuity.
Suppliers with relevant experience and capability are invited to express interest and participate in the CoP.
- How the procedure runs: Yorkshire Water will run a multi-stage procurement using the competitive flexible procedure in accordance with the Procurement Act 2023. Stage 1 - Conditions of Participation (CoP): Interested suppliers submit a COP Questionnaire. Responses are assessed against defined pass/fail Selection Criteria to determine whether suppliers meet Yorkshire Water's minimum requirements. Yorkshire Water may conduct one or more rounds of Selection and reserves the right to shortlist suppliers progressing to subsequent stages. Stage 2 - Contractual Compliance: Shortlisted suppliers will be invited to review and, where permitted, comment on the Proposed Contract. Yorkshire Water will refine and finalise the contract terms during this stage. Only suppliers who accept the final contract terms will progress to the ITT stage. Stage 3 - Invitation to Tender (Quality & Commercial): Suppliers will submit detailed quality and commercial tenders, which will be evaluated in accordance with the award criteria set out in the ITT documentation. Following evaluation, Yorkshire Water will identify the most economically advantageous tenders and award places on the Technical Services and Assurance Framework. The procedure structure and indicative timelines are set out in the procurement documents.
CPV: Engineering design services · Installation services of electrical and mechanical equipment · Machinery for the treatment of sewage · Sewage plant equipment · Sewage treatment services · Sewage treatment works · Sludge-treatment works
How this framework works
From the published notice- Type
- Closed framework
- Call-offs
- call-offs may be awarded directly or by further competition
- Framework period
- 4 yrs · up to 8 yrs from 1 Jan 2027
Published description of the framework
The framework will operate on a multi-supplier basis, with Yorkshire Water awarding call-off contracts in accordance with the procedures set out in the Framework Agreement. Prices for call-offs will be determined using the pricing schedules established at tender, with the ability to confirm or adjust pricing where permitted by the call-off process.
Call-off contracts may be awarded either directly, where the framework provides an objective method to identify the most suitable supplier for a defined requirement, or following a further competition among the suppliers appointed to the framework.
Yorkshire Water will apply the framework rules consistently to ensure transparency, fairness and proportionality in allocating work, while enabling flexibility to meet programme needs. The operation of the framework will be governed by the terms of the Framework Agreement and the procedures communicated during the procurement process.
The lotProcurement structure
single lot · value publishedWhat 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 sub-criteria (2)
- Quality Questionnaire: 50%
- Commercial Questionnaire: 50%
Published award criteria (2)
- Commercial Questionnaire
- Quality Questionnaire
- Price carries 50 of 100 points: a 10% discount moves about 5 points. This one is won on the number: sharpen the price before polishing the prose.
- “CM3543 ASP Diffuser Asset Replacement” is a framework: the contest is a place on its panel, 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
- 11 Jun 2026, 12:32 BST
- Last source update
- 21 Jul 2026, 09:47 BST
- Award evaluation window
- Submission end – 20 Nov 2026
- Authority reference
CM3543- FTS notice number
2026/S 000-067620- Latest notice
- Tender notice (UK4)
- Classification (CPV)
- Delivery area
- Official registry OCID
ocds-h6vhtk-06b2d2Find a Tender
- How it runs
Yorkshire Water will run a multi-stage procurement using the competitive flexible procedure in accordance with the Procurement Act 2023.
Stage 1 - Conditions of Participation (CoP):
Interested suppliers submit a COP Questionnaire. Responses are assessed against defined pass/fail Selection Criteria to determine whether suppliers meet Yorkshire Water's minimum requirements. Yorkshire Water may conduct one or more rounds of Selection and reserves the right to shortlist suppliers progressing to subsequent stages.
Stage 2 - Contractual Compliance:
Shortlisted suppliers will be invited to review and, where permitted, comment on the Proposed Contract. Yorkshire Water will refine and finalise the contract terms during this stage. Only suppliers who accept the final contract terms will progress to the ITT stage.
Stage 3 - Invitation to Tender (Quality & Commercial):
Suppliers will submit detailed quality and commercial tenders, which will be evaluated in accordance with the award criteria set out in the ITT documentation.
Following evaluation, Yorkshire Water will identify the most economically advantageous tenders and award places on the Technical Services and Assurance Framework.
The procedure structure and indicative timelines are set out in the procurement documents.
How it was run
Official notice- Requests to participate (first stage)
- 12 Aug 2026, 23:59 BST
- Appointment period ends
- 12 Aug 2026, 23:59 BST
- Submission channel
- Official e-sourcing portal
- Electronic submission
- Allowed
- Accepted languages
- en
Tenders must be submitted electronically via SAP Ariba, Yorkshire Water's e-procurement portal s1-eu.ariba.com/Sourcing/Main/aw ↗... Suppliers will not be able to view or access the tender in SAP Ariba unless they have been invited by Yorkshire Water through the portal. Those who expressed interest through the UK2 have been invited to participate.
If you wish to participate but are not yet registered as a Yorkshire Water supplier, please email: [email protected] and include the full legal company name, and the email address you wish to register. You will then be issued with a registration request and an invitation to the tender via SAP Ariba.
If you are already registered as a Yorkshire Water supplier but have not received an invitation, please email [email protected] and include your ANID number, your full company name, and your registered Ariba email address, so that an invitation to the tender can be issued.
Tender submissions by email or post will not be accepted.
Timeline
11 Jun 2026 → 1 Jan 2027 · 7 dates- Planning notice published132 days ago11 Jun 2026, 12:32 BST
- Market engagement97 days ago15 Jul 2026, 23:59 BST
Suppliers are invited to express interest via email to [email protected] with brief details of their service offering.
If you wish to express interest but are not yet registered as a Yorkshire Water supplier, please email: [email protected] and include the full legal company name, and the email address you wish to register.
If you are already registered as a Yorkshire Water supplier, please email [email protected] and include your ANID number, your full company name, and your registered Ariba email address.
There are no specific conditions for participation in this market engagement. Participation is voluntary and non-binding.
- Tender notice published96 days ago17 Jul 2026, 11:04 BST
- Latest notice published92 days ago21 Jul 2026, 09:47 BST
- Admission / appointment period ends69 days ago · period end, not a bid countdown12 Aug 2026, 23:59 BST
- Today21 Oct 2026
- Award decision expected byin 31 days20 Nov 2026, 23:59 GMT
- Contract startsin 72 days1 Jan 2027
Notice history
6 events · 3 releases on Find a Tender · since 11 Jun 2026- Preliminary market engagement notice published11 Jun 2026, 12:32 BSTUK2
- Tender notice published17 Jul 2026, 11:04 BSTUK4
- Published value updated to £9,273,55017 Jul 2026, 11:04 BSTwas £8,400,000
- Status changed to active17 Jul 2026, 11:04 BST
- Procurement method changed17 Jul 2026, 11:04 BST
- Tender notice published21 Jul 2026, 09:47 BSTUK4
Contracting authority & participating public bodies
Official documents & specifications (3)
Official links; attachments are not copiedNotices published for this procedure
- Tender notice Tender notice on Find a Tender
- Tender notice Tender notice on Find a Tender
- Preliminary market engagement notice Preliminary market engagement notice on Find a Tender