Official UK procurement notice
Sewer Mapping · UK public procurement notice
Authority: THAMES WATER UTILITIES LIMITED
What is being bought3 lots · detail below
Published requirement descriptionThames Water is seeking to develop the mapped sewer network throughout Greater London and the Thames Valley area, in order to reduce blockages, internal and external floods and pollution.
Unmapped sewers lead to a delay in Thames Water locating and attending blockages, floods and pollution, affecting local communities and the environment.
The objective of FA2241 is to map any unmapped sewer networks at scale, speed and accuracy, directly supporting the Pollution Incident Reduction Plan (PIRP) that Thames Water is working towards during AMP8.
Lot 1 - Aerial Mapping: Capture of 2,484 km² across 71 Sewer Drainage Area Catchments (SDACs) using manned aircraft, delivering georeferenced 2D, oblique 2D, and 3D imagery.
Lot 2 - Asset Detection: Detection of manholes, gullies, rainwater downpipes, soil stacks, misconnections, and outfalls with confidence grading.
Lot 3 - Sewer Inferencing: Semi-/automated inferencing of unmapped sewers, laterals, drains, rising mains, and selected SPSs, achieving ?80% accuracy.
- How the procedure runs: • Procedure: Competitive Flexible Procedure (above-threshold) • Award model: One supplier will be appointed for each Lot. Bidders may apply for multiple Lots, but Thames Water reserves the right to limit awards so that each bidder receives only one Lot, to ensure resilience and spread of risk. • Call-offs: Once the framework is established, direct awards only will be made to the sole Lot holder. Stages: PSQ Evaluation and Shortlisting ITN Stage 1 - desktop evaluation, shortlisting, negotiations ITN Stage 2 - supplier presentations, potential negotiations Evaluation weighting: • Technical (Quality): 60% • Commercial (Price): 40% Timeline: • Sept 2025 - Contract Notice & PSQ release • Oct 2025 - ITN issue • Nov 2025 - ITN return • Jan 2026 - Supplier presentations & evaluation • Feb 2026 - Award & contract signature
CPV: Sewer survey services
How this framework works
From the published notice- Type
- Closed framework
- Call-offs
- every call-off is a further competition among the appointed suppliers
- Places
- up to 3 suppliers · 2 appointed
- Framework period
- 4 yrs · up to 6 yrs from 2 Mar 2026
Published description of the framework
Thames Water is seeking to develop the mapped sewer network throughout Greater London and the Thames Valley area, in order to reduce blockages, internal and external floods and pollution.
Unmapped sewers lead to a delay in Thames Water locating and attending blockages, floods and pollution, affecting local communities and the environment.
The objective of FA2241 is to map any unmapped sewer networks at scale, speed and accuracy, directly supporting the Pollution Incident Reduction Plan (PIRP) that Thames Water is working towards during AMP8.
Lot 1 - Aerial Mapping: Capture of 2,484 km² across 71 Sewer Drainage Area Catchments (SDACs) using manned aircraft, delivering georeferenced 2D, oblique 2D, and 3D imagery.
Lot 2 - Asset Detection: Detection of manholes, gullies, rainwater downpipes, soil stacks, misconnections, and outfalls with confidence grading.
Lot 3 - Sewer Inferencing: Semi-/automated inferencing of unmapped sewers, laterals, drains, rising mains, and selected SPSs, achieving ≥80% accuracy.
Lots and requirements (3)Procurement structure
3 lots · all with a published value · same evaluation weights on every lotLot #1Aerial MappingAwardedRenewalPublished value£3,511,323
Capture of 2D, oblique 2D, and 3D georeferenced imagery for 2,484 km² across 71 Sewer Drainage Area Catchments (SDACs), phased delivery by 2028, conducted by manned aircraft.
- Economic & financial standing
Conditions of participation
o Legal & financial: D&B check required; Parent Company Guarantee may be requested.
o Insurance: £10m PI and £10m PLI required.
o Technical: Demonstrated experience of aerial mapping, asset detection, and/or inferencing at required scale; ability to meet minimum accuracy thresholds.
Lot #2Asset DetectionAwardedRenewalPublished value£1,357,161
Detection of manholes, rainwater downpipes, surface water outfalls, gullies, soil stacks, and misconnections, with confidence grading.
£5m Product Liability will also be required,
- Economic & financial standing
Conditions of participation
o Legal & financial: D&B check required; Parent Company Guarantee may be requested.
o Insurance: £10m PI and £10m PLI required.
o Technical: Demonstrated experience of aerial mapping, asset detection, and/or inferencing at required scale; ability to meet minimum accuracy thresholds.
- Condition of participationshortlisting
Conditions of participation
o Legal & financial: D&B check required; Parent Company Guarantee may be requested.
o Insurance: £10m PI, £5m Product Liability and £10m PLI required.
o Technical: Demonstrated experience of aerial mapping, asset detection, and/or inferencing at required scale; ability to meet minimum accuracy thresholds.
Lot #3Sewer InferencingAwardedRenewalPublished value£1,127,516
Lot 3 - Sewer Inferencing: Semi-/automated inferencing of unmapped sewers, laterals, drains, rising mains, and selected SPSs, achieving ≥80% accuracy.
£5m Product Liability will also be required,
- Economic & financial standing
Conditions of participation
o Legal & financial: D&B check required; Parent Company Guarantee may be requested.
o Insurance: £10m PI and £10m PLI required.
o Technical: Demonstrated experience of aerial mapping, asset detection, and/or inferencing at required scale; ability to meet minimum accuracy thresholds.
- Condition of participationshortlisting
Conditions of participation
o Legal & financial: D&B check required; Parent Company Guarantee may be requested.
o Insurance: £10m PI, £5m Product Liability and £10m PLI required.
o Technical: Demonstrated experience of aerial mapping, asset detection, and/or inferencing at required scale; ability to meet minimum accuracy thresholds.
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 sub-criteria (2)
- Technical: 60%
- Commercial: 40%
Published award criteria (2)
- Technical: Methodology, accuracy, delivery programme, innovation, sustainability, risk management.
- Commercial: Fixed-price, milestone-based pricing, efficiency proposals.
- Price carries 40 of 100 points: a 10% discount moves about 4 points. The method statement decides this lot, not the discount.
- “Sewer Mapping” is a framework: the contest is a place on its panel, up to 3 suppliers, not a single contract: each call-off is a further competition, so the pricing contest starts after appointment.
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
- Services
- Notice status
- Awarded
- 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
- 10 Sept 2025, 15:10 BST
- Last source update
- 6 Mar 2026, 10:21 GMT
- Award evaluation window
- Submission end – 16 Feb 2026
- Authority reference
FA2241- FTS notice number
2025/S 000-055461- Latest notice
- Contract award notice (UK6)
- Classification (CPV)
- Delivery area
- Official registry OCID
ocds-h6vhtk-0597b6Find a Tender
- How it runs
- Procedure: Competitive Flexible Procedure (above-threshold)
- Award model: One supplier will be appointed for each Lot. Bidders may apply for multiple Lots, but Thames Water reserves the right to limit awards so that each bidder receives only one Lot, to ensure resilience and spread of risk.
- Call-offs: Once the framework is established, direct awards only will be made to the sole Lot holder.
Stages:
PSQ Evaluation and Shortlisting
ITN Stage 1 - desktop evaluation, shortlisting, negotiations
ITN Stage 2 - supplier presentations, potential negotiations
Evaluation weighting:
- Technical (Quality): 60%
- Commercial (Price): 40%
Timeline:
- Sept 2025 - Contract Notice & PSQ release
- Oct 2025 - ITN issue
- Nov 2025 - ITN return
- Jan 2026 - Supplier presentations & evaluation
- Feb 2026 - Award & contract signature
How it was run
Official notice- Requests to participate (first stage)
- 3 Oct 2025, 10:00 BST
- Appointment period ends
- 3 Oct 2025, 10:00 BST
- Submission channel
- Official e-sourcing portal
- Electronic submission
- Allowed
- Accepted languages
- en
Please fill out the details in this link to gain access to the PSQ;
Timeline
10 Sept 2025 → 18 Mar 2026 · 7 dates- Tender notice published10 Sept 2025, 15:10 BST
- Admission / appointment period ends388 days ago · period end, not a bid countdown3 Oct 2025, 10:00 BST
- Award decision expected by252 days ago16 Feb 2026, 23:59 GMT
- Contract starts239 days ago2 Mar 2026
- Assessment summaries sent235 days ago6 Mar 2026
- Latest notice published234 days ago6 Mar 2026, 10:21 GMT
- Standstill ends222 days ago18 Mar 2026, 23:59 GMT
Notice history
4 events · 2 releases on Find a Tender · since 10 Sept 2025- Tender notice published10 Sept 2025, 15:10 BSTUK4
- Contract award notice published6 Mar 2026, 10:21 GMTUK6
- Status changed to complete6 Mar 2026, 10:21 GMT
- Contract signature expected19 Mar 2026, 23:59 GMTscheduled
Commercial outcome & contract awards
Published awards, contracts and bid statistics, not a forecast£5,996,000 is the framework's published maximum, restated by the publisher on 2 award rows. It is one ceiling, not 2 separate sums, and no share per lot is published; those rows read “ceiling above”.
| Awarded to | Value | Date | Status |
|---|---|---|---|
| Lot 3 · Sewer Inferencing1 award | |||
| 1Spatial Group Ltd19 Mar 2026 – 28 Feb 2030 · up to 27 Feb 2032Extensions: Thames Water envisages that the contract will be awarded for an initial term of 4 years with options to extend by 2 years, up to a maximum overall term of 6 years. Additional purchases of aerial survey services may be considered during the contract term, subject to ITN specification. · Options: The right to additional purchases while the contract is valid. The full scope of the services to be provided and any options that may be considered throughout the term of the agreement, is set out in the Specification issued within the Invitation to Negotiate (ITN) document. | ceiling above | 6 Mar 2026standstill to 18 Mar 2026 | Standstill |
| Across several lots1 award | |||
| APEM19 Mar 2026 – 28 Feb 2030 · up to 27 Feb 2032Extensions: Thames Water envisages that the contract will be awarded for an initial term of 4 years with options to extend by 2 years, up to a maximum overall term of 6 years. Additional purchases of aerial survey services may be considered during the contract term, subject to ITN specification · Options: The right to additional purchases while the contract is valid. The full scope of the services to be provided and any options that may be consideredthroughout the term of the agreement, is set out in the Specification issued within the Invitation to Negotiate (ITN) document. | ceiling above | 6 Mar 2026standstill to 18 Mar 2026 | Standstill |
Contracting authority & participating public bodies
Framework contractors & participating bidders
2 commercial parties on the notice- 1SPATIAL GROUP LIMITEDFramework contractor
- APEM LIMITEDFramework contractor
Official documents & specifications (3)
Official links; attachments are not copiedNotices published for this procedure
- Contract award notice Contract award notice on Find a Tender
- Contract award notice Contract award notice on Find a Tender
- Tender notice Tender notice on Find a Tender