Official UK procurement notice
Dynamic Market for Process Safety Consulting & Maintenance
Authority: Wessex Water Services Ltd (Public body)·On behalf of: YTL CONSTRUCTION (UK) LIMITED
What is being bought2 lots · detail below
Published requirement descriptionWessex Water has five sites with the capability for biomethane gas production through anaerobic digestion (and in some cases food waste) with the ability for gas exportation off site. This entails consultancy and maintenance work more traditionally found in the gas / energy sector rather than the water sector.
We're seeking suppliers with the relevant expertise to support our requirements in these areas:
- Lot 1: Process Engineering & Process Safety Consultancy
- Lot 2: DSEAR / Safety Critical Maintenance
CPV: Engineering-design services for industrial process and production · Hazard protection and control consultancy services · Repair and maintenance of plant · Repair and maintenance services · Technical analysis or consultancy services · Technical inspection and testing services
How this dynamic market works
From the published notice- Type
- Dynamic market · pending
- Market period
- 8 Aug 2025 – …
- Buyer regions
- UKK12
- Buyer types
- utilities
- Supplier levy on call-offs (max %)
- None
Who may buy through it
Wessex Water Services Ltd., YTL Construction (UK) Ltd., YTL Infrastructure (UK) Ltd., YTL Plant & Fleet Solutions (UK) Ltd.
Lots and requirements (2)Procurement structure
2 lots · no lot values publishedLot #1Process Engineering & Process Safety Consultancy
This Lot will create a pool of suitably qualified suppliers that will be invited to bid for consultancy work in the following areas (non-exhaustive):
- Formal Process Safety Assessment Studies (FPSA), Hazard Identification (HAZID), Hazard & Operability Study (HAZOP), Layer of Protection Analysis (LOPA), Human Factor Studies, Quantitative Risk Assessment (QRA), Functional Safety (1-5) stages, Occupied Building Risk Assessment (OBRA, Failure Mode & Effects Analysis (FMEA)
- Gas detection systems (including location)
- Consequence Modelling
- Dangerous Substances & Explosive Atmosphere Regulations (DSEAR) risk assessments
- Review/update Hazardous Area classification (HAC)
- Hazardous Area Drawings (HACs)
- High pressure gas pipework design including TD/12
- Process design requirements including propane, methanol, oxygen, biogas, chlorine, and pyrolysis
- Plant performance diagnosis
- Gas bag and flare systems
- Biomethane injection
- Economic & financial standing
As described in the PQQ documents and Jaggaer / Bravo onboarding process.
Verified by: As described in the PQQ documents and Jaggaer / Bravo onboarding process. - Technical & professional ability
Full details of requirements are listed in the PQQ documents, but include technical expertise in gas / biogas / toxic gas and the application of:
- Inherently safer design ISrD
- Identification of major accident hazards
- Application and demonstration of ALARP, for example expertise in the following areas: Functional Safety IEC 61508 and 61511 and Machinery Safety BS13849
Verified by: Responses will be assessed by suitably experienced staff.
Lot #2DSEAR / Safety Critical Maintenance
This Lot will create a pool of suitably qualified suppliers that will be invited to bid for consultancy work in the following areas (non-exhaustive):
- ATEX (Explosive Atmospheres) Equipment & SR/25 Modification Assessment
- Working in DSEAR zones
- Dangerous substances & Explosive Atmosphere Regulations (DSEAR) risk assessments
- Detailed/update P&ID drawings, detailed GA Drawings, Plant Layout drawings
- Gas quality sampling and monitoring
- Routine inspections of ATEX equipment
- LEV/MEV-Ventilation systems review
- Review Gas detection system
- Economic & financial standing
As described in the PQQ documents and Jaggaer / Bravo onboarding process.
Verified by: As described in the PQQ documents and Jaggaer / Bravo onboarding process. - Technical & professional ability
Full details of requirements are listed in the PQQ documents, but include technical expertise in gas / biogas / toxic gas in the context of DSEAR and safety critical maintenance.
Verified by: Responses will be assessed by suitably experienced staff.
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).
- “Dynamic Market for Process Safety Consulting & Maintenance” is a dynamic market: the contest is a place on its panel, not a single contract.
Competition analysis · published record, not a forecast of who will bid
How Wessex Water Services Ltd buys Consultative engineering and construction services (CPV 7131), and who usually turns up
Wessex Water Services Ltd’s published record next to the market for the same work. Compared with other frameworks and DPS only. Whole-market view: Consultative engineering and construction services (CPV 7131) →
How the contest usually goes
Winner shares use published awards; bid and price charts use contested lots.
i
How often small and medium firms win.
Share of awards where the winner’s size is known.
The counts under this question show how many awards have a known supplier size.
Small firms have won here. Neither number says whether you qualify; it describes who has been winning.
i
How often local firms win similar work.
Winners with a registered address in the delivery region, out of awards with a known address.
Local means the winner is registered in the region where that award was delivered. The market figure counts awards delivered in South West England.
A local branch does not count if the registered address is elsewhere.
Most of this buyer’s recorded winners were registered outside the region where that award was delivered.
i
How long buyers here take to decide after bids close.
Middle value in days from the bid deadline to the award date, on competitions that published both.
Only decided tenders count, so slow ones still waiting are not in.
Half of these awards have an award date within 113 days of the bid deadline.
i
How often work is awarded with no recorded rival.
Direct awards and tenders where every published lot count shows one bid.
The market share is a minimum: some awards have no bid count.
Thin markets produce this too; it is not proof of a tailored specification.
Awards are recorded, but published direct routes and bid counts do not establish this buyer’s share.
How many bids did past lots attract?
i
How many bids past lots received.
Each colour is a bid-count range. Only competed lots with a published count are included.
Past bids do not predict this tender.
1 bid4%
2–313%
4–622%
7+61%
How did awards compare with estimates?
i
Where winning prices landed against estimates.
Each colour shows awards below, close to or above the published estimate, one lot at a time.
On a framework or DPS, prices are agreed when work is called off.
Past prices are a guide, not a bid price.
Not comparable on a framework or DPS: the price is set later, on each call-off.
Assess each lot i
What past awards tell you about each lot.
See the forecast, this buyer’s earlier suppliers and firms with relevant wins.
No supplier is confirmed as a bidder.
i
What past awards tell you about each lot.
See the forecast, this buyer’s earlier suppliers and firms with relevant wins.
No supplier is confirmed as a bidder.
Open a lot for its forecast, this buyer’s previous supplier and possible competitors, from published award history, not a bid list
Lot #1Process Engineering & Process Safety ConsultancyCPV 71Estimate not published
This lot lists more than one class in CPV 71. The comparison uses that group.
i
How many bids this lot may attract.
The forecast uses similar past competitions. The bar shows either that forecast or past bid counts; the line below says which.
Each lot shows its own forecast based on its own category; forecasts for different lots of the same notice are not comparative.
A forecast, not a list of bidders.
1 bid3%
2–320%
4–632%
7+44%
i
Where the award price may land.
The forecast uses similar awards and the buyer’s estimate. The band covers the middle half of likely prices.
No comparable awards for this lot yet.
A statistical guide from past awards, not a price to bid.
Who has supplied this buyer on similar work? i
Who has done similar work for this buyer.
Past contracts are matched by buyer, title and type of work.
A past supplier may not bid again.
i
Who has done similar work for this buyer.
Past contracts are matched by buyer, title and type of work.
A past supplier may not bid again.
| Supplier | This buyer’s earlier contract | Lot | Award value | Why listed |
|---|---|---|---|---|
| Jackson Drilling Holdings LimitedWorked for this buyer | Site Investigation & Contaminated Land Servicesnotice published Mar 2025 | Lot 1 – 1D and 2D modelling activities | — | Similar wording and category |
| Stantec UK LimitedWorked for this buyer | Site Investigation & Contaminated Land Servicesnotice published Mar 2025 | Lot 1 – 1D and 2D modelling activities | — | Similar wording and category |
| Atkins LimitedWorked for this buyer | Site Investigation & Contaminated Land Servicesnotice published Mar 2025 | Lot 1 – 1D and 2D modelling activities | — | Similar wording and category |
| Mott MacDonaldWorked for this buyer | Site Investigation & Contaminated Land Servicesnotice published Mar 2025 | Lot 1 – 1D and 2D modelling activities | — | Similar wording and category |
| RSK Environment LimitedWorked for this buyer | Site Investigation & Contaminated Land Servicesnotice published Mar 2025 | Lot 1 – 1D and 2D modelling activities | — | Similar wording and category |
Who could compete for this lot? i
Who could compete for this lot?
Firms with relevant past wins. On a framework, we show firms on that agreement.
None is confirmed as a bidder.
i
Who could compete for this lot?
Firms with relevant past wins. On a framework, we show firms on that agreement.
None is confirmed as a bidder.
| Supplier | Won in this category | Live contracts | Award vs estimate |
|---|---|---|---|
| 5 awards in 36m · last 2 months ago | 2 live · £27m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | at estimate n=1 | |
WSP UK LimitedLarge | £487m125 awards in 36m · last this month | 51 live · £411m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | at estimate n=17 |
Atkins LimitedLarge | £140m95 awards in 36m · last this month | 32 live · £189m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | at estimate n=15 |
Mott MacDonaldLarge | £72m86 awards in 36m · last 1 month ago | 15 live · £40m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | 11% below n=19 |
| £3.0m30 awards in 36m · last 1 month ago | 3 live · £492k iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | 14% below n=2 |
Lot #2DSEAR / Safety Critical MaintenanceCPV 4525Estimate not published
This lot is listed as CPV 4525. The table above uses the notice category.
i
How many bids this lot may attract.
The forecast uses similar past competitions. The bar shows either that forecast or past bid counts; the line below says which.
Each lot shows its own forecast based on its own category; forecasts for different lots of the same notice are not comparative.
A forecast, not a list of bidders.
1 bid4%
2–321%
4–631%
7+44%
i
Where the award price may land.
The forecast uses similar awards and the buyer’s estimate. The band covers the middle half of likely prices.
No comparable awards for this lot yet.
A statistical guide from past awards, not a price to bid.
Who has supplied this buyer on similar work? i
Who has done similar work for this buyer.
Past contracts are matched by buyer, title and type of work.
A past supplier may not bid again.
i
Who has done similar work for this buyer.
Past contracts are matched by buyer, title and type of work.
A past supplier may not bid again.
| Supplier | This buyer’s earlier contract | Lot | Award value | Why listed |
|---|---|---|---|---|
| WSP UK LimitedWorked for this buyer | Site Investigation & Contaminated Land Servicesnotice published Mar 2025 | Lot 1 – 1D and 2D modelling activities | — | Similar wording and category |
| RSK Environment LimitedWorked for this buyer | Site Investigation & Contaminated Land Servicesnotice published Mar 2025 | Lot 1 – 1D and 2D modelling activities | — | Similar wording and category |
| Quantum Geotechnic LimitedWorked for this buyer | Site Investigation & Contaminated Land Servicesnotice published Mar 2025 | Lot 1 – 1D and 2D modelling activities | — | Similar wording and category |
| Geotechnical Engineering LimitedWorked for this buyer | Site Investigation & Contaminated Land Servicesnotice published Mar 2025 | Lot 1 – 1D and 2D modelling activities | — | Similar wording and category |
| HydroCo LimitedWorked for this buyer | Site Investigation & Contaminated Land Servicesnotice published Mar 2025 | Lot 1 – 1D and 2D modelling activities | — | Similar wording and category |
Who could compete for this lot? i
Who could compete for this lot?
Firms with relevant past wins. On a framework, we show firms on that agreement.
None is confirmed as a bidder.
i
Who could compete for this lot?
Firms with relevant past wins. On a framework, we show firms on that agreement.
None is confirmed as a bidder.
| Supplier | Won in this category | Live contracts | Award vs estimate |
|---|---|---|---|
| 5 awards in 36m · last 2 months ago | 2 live · £27m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | at estimate n=1 | |
WSP UK LimitedLarge | £487m125 awards in 36m · last this month | 51 live · £411m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | at estimate n=17 |
Atkins LimitedLarge | £140m95 awards in 36m · last this month | 32 live · £189m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | at estimate n=15 |
Mott MacDonaldLarge | £72m86 awards in 36m · last 1 month ago | 15 live · £40m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | 11% below n=19 |
| £3.0m30 awards in 36m · last 1 month ago | 3 live · £492k iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | 14% below n=2 |
About this data
- Source. Official UK public procurement notices (Find a Tender), reused under the Open Government Licence v3.0. New notices arrive through the day; the figures are rebuilt nightly.
- Two views, kept apart. The authority’s own track record and the wider market for the same kind of work sit side by side and are never mixed. Where the local picture is too thin, a figure widens to a broader market and says which one it used.
- Forecasts are labelled. The price forecast and its range, possible competitors and the earlier-work matches are our estimates from past awards: not published facts, not win chances and not price advice. Official notices do not say who is bidding.
- Every figure shows what it rests on. Not every notice publishes a bid count, a value or a delivery region, so each figure carries the number of records behind it, and one built on few records is marked as such. The on a figure explains it; the counting rules are in the methodology. Spotted something wrong? Tell us.
Procedure terms & legal framework
From the official record- Procedure method
- Dynamic market
- Legal basis
- UKPGA · 2023/54 Procurement Act 2023
- Procurement category
- Services
- Notice status
- Closed
- Procurement threshold
- Unspecified in notice
- Regulatory regime
- Utilities
- Commercial structure
- Dynamic market
- Who may use this agreement
Wessex Water Services Ltd., YTL Construction (UK) Ltd., YTL Infrastructure (UK) Ltd., YTL Plant & Fleet Solutions (UK) Ltd.
- Competition type
- Competitive procedure
- GPA / WTO covered
- Yes (GPA)
- Recurring procurement
- Unspecified in notice
- First published
- 2 Jul 2025, 10:58 BST
- Last source update
- 2 Jul 2025, 10:58 BST
- Authority reference
UDM.1- FTS notice number
2025/S 000-036688- Latest notice
- Dynamic market intention notice (UK13)
- Classification (CPV)
- Delivery area
- Official registry OCID
ocds-h6vhtk-055759Find a Tender
How it was run
Official notice- Admission period ends
- —
- Submission channel
- Official e-sourcing portal
- Electronic submission
- Allowed
- Supplier levy on call-offs (max %)
- submission fee · None
Bidders must register on wessexwater.bravosolution.co.uk ↗. An account must be created and successfully assessed as 'Registration Criteria Met' as the first step in qualifying for the Dynamic Market. Access to the PQQ is then possible where bidders can complete their application.
Timeline
1 published date- Tender notice published2 Jul 2025, 10:58 BST
Notice history
1 event · 1 release on Find a Tender- Dynamic market intention notice published2 Jul 2025, 10:58 BSTUK13
Contracting authority & participating public bodies
4 public bodies on the noticeConsortium members and other public bodies
- YTL CONSTRUCTION (UK) LIMITEDContracting authorityPrivate utility
- YTL INFRASTRUCTURE (UK) LIMITEDContracting authorityPrivate utility
- YTL PLANT AND FLEET SOLUTIONS (UK) LIMITEDContracting authorityPrivate utility
Official documents & specifications (1)
Official links; attachments are not copiedNotices published for this procedure
- Dynamic market intention notice Dynamic market intention notice on Find a Tender