---
title: "Wholesaler/Retailer Risk Allocation Model"
ocid: "ocds-h6vhtk-065444"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-065444"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-065444.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-065444.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "THE WATER SERVICES REGULATION AUTHORITY"
published: "2026-04-22"
---

# Wholesaler/Retailer Risk Allocation Model

Buyer: THE WATER SERVICES REGULATION AUTHORITY  
Current stage: Award  
OCID: ocds-h6vhtk-065444

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## Summary

The Water Services Regulation Authority, commonly known as Ofwat, is the buying organisation overseeing the contracting process for the Wholesaler/Retailer Risk Allocation Model. This public procurement falls under the industry category of business and management consultancy services and encompasses regions across the United Kingdom. The procurement process has reached the contract amendment stage as of 22nd April 2026. The initial contract was awarded to Cubelynx Limited, a small to medium-sized enterprise based in London, with contract periods extending from 28th November 2025 to 21st August 2026. The procurement was conducted using a direct method below the threshold, without competition, in accordance with various regulatory requirements under the Procurement Act 2023.

This tender offers a strategic opportunity for businesses specialising in business consultancy and risk modelling. Enterprises that can produce comprehensive quantitative models of costs and risks, particularly relating to credit and collateral arrangements in the business retail market, will find this tender pertinent. Engaging with Ofwat and producing robust models that could be published for external review can bolster a company’s reputation and portfolio in regulatory compliance and strategic modelling sectors. Small to medium-sized enterprises with expertise in developing and documenting sophisticated financial models are particularly well-suited to participate in such procurements and potentially enhance their market growth by collaborating with a central government public authority like Ofwat.

## Notice

Undertake modelling work and produce quantitative models of the costs and risks of different credit and collateral arrangements in the business retail market, together with supporting documentation. The Supplier shall provide the following Deliverables to the Customer as part of the Services: (1) Review the 2016 model of credit support costs to understand principal inputs, outputs and parameters, taking into account any relevant feedback Ofwat may have received regarding that modelling and updates to the modelling documentation. This shall be a Word document. (2) Develop and produce an understanding of prepayment and post payment timelines regarding Retailer payments to Wholesalers, as specified under the Wholesaler Retailer Code The Supplier shall provide the following Deliverables to the Customer as part of the Services: (1) Review the 2016 model of credit support costs to understand principal inputs, outputs and parameters, taking into account any relevant feedback Ofwat may have received regarding that modelling and updates to the modelling documentation. This shall be a Word document. (2) Develop and produce an understanding of prepayment and post payment timelines regarding Retailer payments to Wholesalers, as specified under the Wholesaler Retailer Code (WRC) business terms (WRC Schedule 1 Part 2 Business terms SS9 Billing and terms of payment - Available at: Market Codes - MOSL). (3) Develop and produce a quantitative model of impacts on and costs for a Retailer of providing different levels of collateral, under the payment timetables established in step (2). Principal costs should include the costs working capital and collateral. Modelling work should include sensitivities to four credit options. This shall be an Excel model. (4) Develop and produce a quantitative model of risk exposure and costs for a Wholesaler under different credit options. Sensitivities should include Retailer collateral provided as a proportion of a Wholesaler's total exposure, probability of Retailer default, and four credit options. This shall be an Excel model. (5) Write guidance documentation to explain and accompany both models, with a view to enabling external stakeholders and interested parties to understand and comment on the models and modelling assumptions. This shall be a Word document. Modelling work is to be carried in collaboration with Ofwat and relevant interim support. The quantitative models must be of a sufficient standard and robustness to be published on the Ofwat website.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/036762-2026 |
| Notice type | UK10 - Contract Change Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Direct |
| Procurement method details | Below threshold - without competition |
| Tender suitability | Not specified |
| Awardee scale | SME |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 22 Apr 2026 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 19 Nov 2025 |
| Contract period | 31 Mar 2026 - 21 Aug 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | £74,850 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | THE WATER SERVICES REGULATION AUTHORITY |
| Locality | BIRMINGHAM |
| Post town | Birmingham |
| Postcode | B5 4UA |
| Country | England |
| ITL 1 | TLG West Midlands (England) |
| ITL 2 | TLG3 West Midlands |
| ITL 3 | TLG31 Birmingham |
| Local authority | Birmingham |
| Electoral ward | Ladywood |
| Westminster constituency | Birmingham Ladywood |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | CUBELYNX |

## CPV Codes

### Divisions

- 79 - Business services: law, marketing, consulting, recruitment, printing and security

### Codes

- 79400000 - Business and management consultancy and related services

## Release History

- 22 Apr 2026 at 15:00 - ContractAmendment - UK10 - Contract Change Notice - https://www.find-tender.service.gov.uk/Notice/036762-2026
- 13 Feb 2026 at 16:01 - Award - UK7 - Contract Details Notice - https://www.find-tender.service.gov.uk/Notice/013577-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/036762-2026
  22nd April 2026 - Contract change notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/013577-2026
  13th February 2026 - Contract details notice on Find a Tender

## Notice URLs

- http://www.ofwat.gov.uk
- https://cubelynx.com/
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-065444. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-065444.json.