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Septic Tank and PTP upgrade: opportunity mapping & modelling

Natural England

This public procurement record has 10 releases in its history.

Award

20 Jun 2025 at 09:29

UK7 - Contract Details Notice
TenderUpdate

02 Jun 2025 at 15:17

UK4 - Tender Notice
TenderUpdate

30 May 2025 at 14:07

UK4 - Tender Notice
TenderUpdate

30 May 2025 at 08:18

UK4 - Tender Notice
TenderUpdate

23 May 2025 at 15:39

UK4 - Tender Notice
TenderUpdate

22 May 2025 at 11:47

UK4 - Tender Notice
TenderUpdate

22 May 2025 at 11:43

UK4 - Tender Notice
TenderUpdate

21 May 2025 at 14:44

UK4 - Tender Notice
TenderUpdate

14 May 2025 at 13:26

UK4 - Tender Notice
Tender

02 May 2025 at 08:41

UK4 - Tender Notice
Summary of the contracting process

Natural England, a central government public authority based in London, has recently completed an open procurement process for the project titled "Septic Tank and PTP Upgrade: Opportunity Mapping & Modelling." The procurement sought to identify opportunities for upgrading ineffective septic tanks and package treatment plants (PTPs) with more efficient alternatives to enhance water quality across 27 designated catchments in the UK. The procurement process, which involved open competition below the threshold, was awarded to Viridian Logic Ltd, a small to medium enterprise (SME), with the contract active from 16th June 2025 to 20th October 2025. The award stage was reached after submissions were received by 3rd June 2025, and the contract was signed on 12th June 2025. The total gross contract value is £50,400.

This tender offers significant opportunities for businesses specialising in environmental services and geographic information (GI) technology. There is potential for firms skilled in nutrient reduction modelling, cost estimation for PTP upgrades, and method development using national datasets. The contract requires managing technical deliverables such as creating reproducible methodologies, datasets, codes, and technical reports, providing an excellent opportunity for businesses to showcase expertise in sustainable environmental management practices. SMEs, particularly those supporting complex environmental and data analysis projects, are well-suited to engage in similar opportunities to innovate and grow through public contracts.

How relevant is this notice?

Notice Information

Notice Title

Septic Tank and PTP upgrade: opportunity mapping & modelling

Notice Description

Natural England are exploring the use of replacing inefficient septic tanks and package treatment plants (PTPs) with PTPs that have a higher treatment efficiency for phosphorus and nitrogen to improve water quality in up to 27 catchments. The anticipated catchments are detailed in a table in the Annex. For each catchment, we require estimates of the following: Scale of opportunity: The scale of opportunity (in units) of upgrading inefficient septic tanks and PTPs in each catchment. This will need to be mapped using GI software. Nutrient reduction: The potential nutrient reduction achieved (in kg/TP and kg/TN) for phosphorus and/or nitrogen depending on the NN catchment from replacing inefficient septic tanks and PTPs with more efficient PTPs. Cost: The cost of delivering replacement PTPs and septic tanks at-scale. In addition to the estimates above, the following deliverables are required: Methodologies: Will need to be developed based on Natural England's existing methods and in consultation with Natural England and created using national datasets. Datasets & code: Natural England will need the ability to run the model independently once the commission is complete. Any datasets and code used to create the methodology, estimates and mapping will need to be made available to NE upon completion. Technical reports: The decided upon methodology will need to be written into a report to ensure it is reproducible by others. This should highlight any uncertainties where they arise. These deliverables will need to be managed and administered by Natural England once the project is complete and are likely to be amended and updated over time.

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-050bea
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/033922-2025
Current Stage
Award
All Stages
Tender, Award

Procurement Classification

Notice Type
UK7 - Contract Details Notice
Procurement Type
Standard
Procurement Category
Services
Procurement Method
Open
Procurement Method Details
Below threshold - open competition
Tender Suitability
SME
Awardee Scale
SME

Common Procurement Vocabulary (CPV)

CPV Divisions

90 - Sewage, refuse, cleaning and environmental services

CPV Codes

90700000 - Environmental services

Notice Value(s)

Tender Value
£48,000 Under £100K
Lots Value
£48,000 Under £100K
Awards Value
Not specified
Contracts Value
£42,000 Under £100K

Notice Dates

Publication Date
20 Jun 20251 years ago
Submission Deadline
3 Jun 2025Expired
Future Notice Date
Not specified
Award Date
12 Jun 20251 years ago
Contract Period
16 Jun 2025 - 20 Oct 2025 1-6 months
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Complete
Awards Status
Active
Contracts Status
Active

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
Natural England
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
LONDON
Postcode
SW1P 4DF
Postcode Area
South West London
Country
England
Major Region (ITL 1)
TLI London
Basic Region (ITL 2)
TLI3 Inner London - West
Small Region (ITL 3)
TLI35 Westminster and City of London
Delivery Location
Not specified
Local Authority
Westminster
Electoral Ward
St James's
Westminster Constituency
Cities of London and Westminster

Supplier Information

Number of Suppliers
1
Supplier Name

Viridian Logic Ltd

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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