---
title: "Interim Delivery Model (IDM) - WH:SHF and WH:LG"
ocid: "ocds-h6vhtk-05098a"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05098a"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-05098a.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-05098a.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "DESNZ & DSIT GROUP COMMERCIAL"
published: "2025-04-29"
---

# Interim Delivery Model (IDM) - WH:SHF and WH:LG

Buyer: DESNZ & DSIT GROUP COMMERCIAL  
Current stage: Award  
OCID: ocds-h6vhtk-05098a

[View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05098a)  
[Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-05098a.json)

## Summary

The Department for Energy Security and Net Zero (DESNZ) has awarded a contract modification to Turner and Townsend Consulting Ltd to provide Interim Delivery Model (IDM) services. This procurement falls under the classification of "Energy and related services" and is located within the UK. The procurement stage is at the awarding phase, with the contract signed on 29th April 2025. The necessity arose to fill a service gap caused by delays in procuring the Delivery Partner 2 for the Warm Homes: Local Grants (WH:LG) and Warm Homes: Social Housing Fund (WH:SHF) schemes. The planned interim services are expected to run from 2nd June 2025 for an estimated 10 months. The procurement method was limited, with the procedure not requiring prior publication due to it falling outside the scope of the usual directive, pursuant to Regulation 72(1)(b) of the Public Contracts Regulations 2015.

This tender presents significant opportunities for businesses in the consulting and energy services sectors, particularly those experienced in government grant management and compliance oversight. Turner and Townsend Consulting Ltd, with their proven track record in delivering technical assistance facilities, are expected to ensure effective operational delivery and minimise service disruption. This process will enable the rapid deployment of grant funding, ensure compliance, and manage risks of fraud and error, making it a valuable opportunity for companies equipped to support such objectives. Organisations skilled in providing administration and business services, including law, marketing, and consulting, would find this role highly suited to their capabilities, allowing them to enhance their portfolios and contribute to public sector efficiency.

## Notice

The Department for Energy Security and Net Zero ("DESNZ") is publishing this voluntary transparency notice to alert economic operators of its intention to vary the Technical Assistance Facility 2 (TAF 2) contract (con_5585) with Turner & Townsend Consulting Ltd (T&T). The variation will enable T&T to provide Interim Delivery Model (IDM) services, addressing a gap in service for grant recipients within the Warm Homes: Local Grants (WH:LG) and Warm Homes: Social Housing Fund (WH:SHF) schemes due to unforeseen delays in procuring the wider Delivery Partner 2 (DP2). The variation will commence following a period of 30 days from the date of publication of this notice. DESNZ informs the market that the relevant modifications (as described below) are justified on the basis that they are in compliance with Public Contracts Regulations 2015 (PCR) pursuant to Regulation 72(1)(b). Please note that the value and duration of this variation is indicative at time of publishing and subject to amendment up to the expiry of this notice.

### Lot Information

Lot 1

Unforeseen delays to the procurement of Delivery Partner 2 (PIN Notice identifier: 2024/S 000-028336) have resulted in a gap in service coverage for Grant Recipients (GRs) of the Warm Homes: Local Grants (WH:LG) and Warm Homes: Social Housing Fund schemes. The schemes will collectively issue PS1.8bn of grant funding; the Authority cannot permit those funds to be issued to grant recipients in the first year of delivery without adequate support and oversight to ensure value for money, adherence to grant issuing conditions and mitigation of the risk of fraud and error. The service gap for in-delivery support between the respective schemes launches (April 2025) and the award and mobilisation of DP2 (TBC - indicative date of early 2026) must be addressed. DESNZ therefore requires a variation to be made to the TAF 2 contract to enable Turner & Townsend to address that service gap via an Interim Delivery Model (IDM). The contract variation is required to enable the provision of an estimated 10 months of interim delivery support from the 2nd of June 2025, until a potential DP2 supplier is awarded and mobilised (TBC - indicative date of early 2026). This contract variation is justified under regulation 72(1)(b) of the Public Contracts Regulations 2015 (PCR 2015) on the basis that: * The additional works have become necessary and were not included in the initial procurement. * A change in contractor cannot be made for economic or technical reasons. * A change in contractor would cause significant inconvenience or substantial duplication of costs for the Contracting Authority, and the value of the modification does not exceed 50% of the original contract value.

### Procurement Information

The Authority holds the view that the contract may be modified without a new award procedure as it satisfies the requirements of Regulation 72(1)(b) of PCR 2015 for the reasons set out below: If the TAF 2 contract is not varied to enable delivery of the IDM, there will be no in-delivery support to WH:SHF and WH:LG scheme grant recipients between the schemes' launch (April 2025) and award/mobilisation of a future DP2 supplier (date TBC - indicative date early 2026). In their capacity as the provider of TAF 2 requirements, T&T has built relationships with grant recipients preparing to receive funding from the WH:LG and WH:SHF schemes through the provision of one-to-one (e.g. masterclasses and roundtables) and one-to-many (e.g. 1-2-1 support) pre-delivery learning and support offerings. Consequently, T&T are well placed to ensure a consistent level of support for grant recipients through the early stages of their projects by ensuring they have access to the technical expertise and resources required to resolve any challenges encountered. TAF2 pre-delivery service packages share significant commonalities with IDM requirements, and can be pivoted with minimal disruption to in-delivery support; in preparing grant recipients to launch their funded projects, T&T has built a credible knowledge of the schemes, supporting policies and steps required to enable effective operational delivery to progress. With the limited time available, The Authority could not define a viable route to market which would have provided similar service continuity and oversight of grant spending between the scheme launches and DP2 award, nor does it have the capacity and capability to deliver those services in-house. Multiple contractor variations would have caused significant disruption to grant recipient user experience, occurring during handover from T&T in their capacity as TAF 2 provider to an IDM supplier, to the eventual DP2 supplier. Finally, the value of the modification will not exceed 50% of the original contract value (PS13.3 million of a contract value of PS26.6 million). In summary, T&T represents the most viable route for DESNZ to ensure: 1. Value for money; 2. Successful/compliant deployment of government grant funding; 3. Mitigation of fraud/error within schemes; and 4. Minimal disruption of services provided to Grant Recipients.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/017748-2025 |
| Notice type | Award Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Limited |
| Procurement method details | Award procedure without prior publication of a call for competition |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 29 Apr 2025 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 28 Apr 2025 |
| Contract period | Not specified |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | £12,100,000 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Not specified |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | DESNZ & DSIT GROUP COMMERCIAL |
| Locality | LONDON |
| Post town | South West London |
| Postcode | SW1A 2EG |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | TURNER AND TOWNSEND CONSULTING |

## CPV Codes

### Divisions

- 71 - Architectural, construction, engineering and inspection services
- 75 - Administration, defence and social security services
- 79 - Business services: law, marketing, consulting, recruitment, printing and security

### Codes

- 71314000 - Energy and related services
- 75100000 - Administration services
- 79000000 - Business services: law, marketing, consulting, recruitment, printing and security

## Release History

- 29 Apr 2025 at 15:53 - Award - Award Notice - https://www.find-tender.service.gov.uk/Notice/017748-2025

## Notice URLs

- https://www.gov.uk/government/organisations/department-for-energy-security-and-net-zero

## 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-05098a. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-05098a.json.