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PROCUREMENT OPPORTUNITY

Septic Tank and PTP upgrade: opportunity mapping & modelling

Natural England · Tender notice on Find a Tender

Tender information last checkedLast checked 30 Sept 2026, 00:47.

Opportunity overview

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.

Awarded to

Amounts belong to published awards or contracts. Where several suppliers share one value, it is labelled as shared and is not a supplier-specific allocation.

Viridian Logic Ltd

Match pending…
Contract value
£42k
Awarded
Not supplied
Contract signed
11 Jun 2025
Including VAT
£50.4k
Award ID
1
Status
active
Location
Brighton, UKJ21, BN1 3HQ, United Kingdom

Classification

  • CPV90700000 — Environmental services

Lots

  • Lot 1£48k

Documents and notices

Published notice details

Additional information from the published procurement release. Fields appear only when supplied by the source; check the original notice and tender documents before acting.

Scope, procedure and submissions

Id
2025/S 000-029212
Status
complete
Above Threshold
No
Procurement Method
open
Main Procurement Category
services
How to submit
To apply for this opportunity you must submit your quotation meeting the requirements detailed in the Request for Quotation (RFQ) attached. Your response must be sent to max.glasser@naturalengland.org.uk or Jack Baribeau John.Baribeau@naturalengland.org.uk by 17:00 on 3rd June 2025. If you have any clarification questions linked to this opportunity or the procurement process please submit these via email to max.glasser@naturalengland.org.uk or Jack Baribeau . Please note that, unless commercially sensitive, both the question and the response will be circulated to all tenderers.
Procurement Method Details
Below threshold - open competition

Amendments

Entry 1
Id
024028-2025
Description
added clarifications to bidders questions
Entry 2
Id
024641-2025
Description
updated clarifications to bidders questions
Entry 3
Id
024647-2025
Description
added email address into submission details
Entry 4
Id
026781-2025
Description
amended submission date typo
Entry 5
Id
028631-2025
Description
Added further Q&As
Entry 6
Id
029212-2025
Description
updated clarifications to bidders questions document

Legal basis

Id
2023/54
Scheme
UKPGA

Tender Period

Ends
3 Jun 2025, 17:00

Enquiry period

Ends
30 May 2025, 17:00

Submission terms

Electronic Submission Policy
notAllowed

Other Requirements

Reserved Participation Location

Gazetteer

Scheme
GB-ONS

Identifiers

K02000001

Lots and requirements

Entry 1
Id
1
Status
complete

Value

Amount
48,000
Currency
GBP
Including VAT
57,600

Suitability

Sme
Yes

Award criteria

Description
Full details available in the RFQ.

Contract period

Ends
26 Oct 2025, 23:59
Starts
17 Jun 2025, 00:00

Items and delivery

Item 1
Id
1
Related Lot
1

Delivery locations

Entry 1
Region
UK
Country
GB
Country Name
United Kingdom
Entry 2
Region
UK
Country
GB
Country Name
United Kingdom
Entry 3
Region
UK
Country
GB
Country Name
United Kingdom
Entry 4
Region
UK
Country
GB
Country Name
United Kingdom
Entry 5
Region
UK
Country
GB
Country Name
United Kingdom
Entry 6
Region
UK
Country
GB
Country Name
United Kingdom
Entry 7
Region
UK
Country
GB
Country Name
United Kingdom
Entry 8
Region
UK
Country
GB
Country Name
United Kingdom
Entry 9
Region
UK
Country
GB
Country Name
United Kingdom

Additional Classifications

Entry 1
Id
90700000
Scheme
CPV
Description
Environmental services

Published documents

Entry 1
Id
A-1065
Format
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Description
RFQ
Document Type
biddingDocuments
Entry 2
Id
A-1066
Format
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Description
Order Form
Document Type
biddingDocuments
Entry 3
Id
A-1067
Format
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Description
Commercial Response
Document Type
biddingDocuments
Entry 4
Id
018628-2025
Format
text/html
Notice Type
UK4
Description
Tender notice on Find a Tender
Document Type
tenderNotice
Published
2 May 2025, 08:41
Entry 5
Id
A-1387
Format
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Description
Clarifications to Bidders' Questions
Document Type
biddingDocuments
Entry 6
Id
021258-2025
Format
text/html
Notice Type
UK4
Description
Tender notice on Find a Tender
Document Type
tenderNotice
Published
14 May 2025, 13:26
Entry 7
Id
A-1571
Format
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Description
Clarifications to Bidders Questions
Document Type
biddingDocuments
Entry 8
Id
024028-2025
Format
text/html
Notice Type
UK4
Description
Tender notice on Find a Tender
Document Type
tenderNotice
Published
21 May 2025, 14:44
Entry 9
Id
A-1615
Format
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Description
Clarifications to Bidders Questions
Document Type
biddingDocuments
Entry 10
Id
024641-2025
Format
text/html
Notice Type
UK4
Description
Tender notice on Find a Tender
Document Type
tenderNotice
Published
22 May 2025, 11:43
Entry 11
Id
024647-2025
Format
text/html
Notice Type
UK4
Description
Tender notice on Find a Tender
Document Type
tenderNotice
Published
22 May 2025, 11:47
Entry 12
Id
026781-2025
Format
text/html
Notice Type
UK4
Description
Tender notice on Find a Tender
Document Type
tenderNotice
Published
23 May 2025, 15:39
Entry 13
Id
A-1778
Format
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Description
Clarification to Bidders' Questions
Document Type
biddingDocuments
Entry 14
Id
028631-2025
Format
text/html
Notice Type
UK4
Description
Tender notice on Find a Tender
Document Type
tenderNotice
Published
30 May 2025, 08:18
Entry 15
Id
A-1789
Format
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Description
Clarification to Bidders' Questions
Document Type
biddingDocuments
Entry 16
Id
028819-2025
Format
text/html
Notice Type
UK4
Description
Tender notice on Find a Tender
Document Type
tenderNotice
Published
30 May 2025, 14:07
Entry 17
Id
A-1820
Format
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Description
Clarifications to Bidders Questions
Document Type
biddingDocuments
Entry 18
Id
029212-2025
Format
text/html
Notice Type
UK4
Description
Tender notice on Find a Tender
Document Type
tenderNotice
Published
2 Jun 2025, 15:17

Buyer, suppliers and contacts

Organisation 1
Id
GB-PPON-PJDG-6588-XDMM
Name
Natural England

Roles

buyer

Address

Region
UKI32
Country
GB
Locality
London
Postal Code
SW1P 4DF
Country Name
United Kingdom
Street Address
Seacole Building, 2 Marsham Street

Details

Classifications

Entry 1
Id
publicAuthorityCentralGovernment
Scheme
UK_CA_TYPE
Description
Public authority - central government

Identifier

Id
PJDG-6588-XDMM
Scheme
GB-PPON

Contact

Name
Max Glasser
Organisation 2
Id
GB-FTS-152012
Name
Viridian Logic Ltd

Roles

supplier

Address

Region
UKJ21
Country
GB
Locality
Brighton
Postal Code
BN1 3HQ
Country Name
United Kingdom
Street Address
F1, 27 Clifton Hill

Details

Vcse
No
Scale
sme

Contact

Award information

Award 1
Id
1
Status
active
Main Procurement Category
services

Items

Item 1
Id
1
Related Lot
1

Delivery locations

Entry 1
Region
UK
Country
GB
Country Name
United Kingdom

Additional Classifications

Entry 1
Id
90700000
Scheme
CPV
Description
Environmental services

Suppliers

Supplier 1
Id
GB-FTS-152012
Name
Viridian Logic Ltd

Related lots

1

Contracts and changes

Entry 1
Id
1
Title
Septic Tank and PTP upgrade: opportunity mapping & modelling
Status
active
Award ID
1
Date Signed
12 Jun 2025, 00:00
Above Threshold
No

Value

Amount
42,000
Currency
GBP
Including VAT
50,400

Period

Ends
20 Oct 2025, 23:59
Starts
16 Jun 2025, 00:00

Documents

Entry 1
Id
033922-2025
Format
text/html
Notice Type
UK7
Description
Contract details notice on Find a Tender
Document Type
contractNotice
Published
20 Jun 2025, 09:29

Recorded locations

  • Buyer location · London · UKI32 · SW1P 4DF · United Kingdom
  • Delivery location · UK · United Kingdom

Notice and amendment history

1 published notice version reviewed by ProcuraAxis.

1 VERSION
  1. ocds-h6vhtk-050bea-2025-06-20T09:29:30+01:00Tender notice on Find a Tender ·