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Climate Ambition Support Alliance Phase 3 (CASA3)

Department for Energy Security & Net Zero

This public procurement record has 1 release in its history.

Tender

02 Sep 2026 at 17:33

UK4 - Tender Notice
Summary of the contracting process

The Department for Energy Security & Net Zero is procuring services for Climate Ambition Support Alliance Phase 3 (CASA3). This is an international climate and foreign economic-aid-related service programme, focused on strengthening the capacity and capability of climate-vulnerable developing countries. The work is intended to help these countries participate effectively in international climate negotiations and engage as progressive, inclusive and rules-based voices within the United Nations Framework Convention on Climate Change and associated multilateral forums. Delivery is across the United Kingdom and developing-country partner contexts, with the department acting as the public-sector buyer. The opportunity is therefore relevant to organisations working in international climate policy, climate finance, development assistance, negotiation support or related capacity-building services.

The procurement has reached tender: the department invited offers through an open procedure. It is a single lot for services, with an estimated value of £8,400,000 excluding VAT and £10,080,000 including VAT. Questions could be submitted until 16 September 2026 at 5:00pm. Offers were due by 6 October 2026 at 5:00pm and are submitted electronically through Jaggaer, in English. The contract is scheduled to run from 4 January 2027 to 5 January 2029, with an extension described as two years plus two years and a maximum end date of 4 January 2030. Evaluation is weighted 85% to technical quality and 15% to commercial price. The award decision was due by 5 November 2026.

This opportunity suits organisations able to design and deliver international climate and development programmes that build institutional capacity in climate-vulnerable developing countries. Relevant providers are likely to include consultancies, international development organisations, climate-policy specialists, research bodies and partnerships with experience supporting governments or other public institutions in international negotiations. The requirement’s focus on the UNFCCC and associated multilateral forums favours teams with credible knowledge of global climate governance, negotiation processes and the needs of developing-country partners. Suppliers should be able to provide technically strong, inclusive and practical support, and to work across international stakeholder groups. Because technical quality carries most of the evaluation weighting, organisations with a demonstrably strong delivery approach should be well placed to compete.

How relevant is this notice?

Notice Information

Notice Title

Climate Ambition Support Alliance Phase 3 (CASA3)

Notice Description

CASA3 is a strategic International Climate Finance (ICF) programme that strengthens the capacity and capability of climate-vulnerable developing countries to participate effectively in international climate negotiations. The programme contributes directly to UK Government priorities by supporting ambitious, inclusive and rules-based international climate negotiations, enabling developing country partners to engage as progressive voices within the United Nations Framework Convention on Climate Change (UNFCCC) and associated multilateral forums.

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-06f0c3
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/083238-2026
Current Stage
Tender
All Stages
Tender

Procurement Classification

Notice Type
UK4 - Tender Notice
Procurement Type
Standard
Procurement Category
Services
Procurement Method
Open
Procurement Method Details
Open procedure
Tender Suitability
Not specified
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

75 - Administration, defence and social security services

CPV Codes

75211200 - Foreign economic-aid-related services

Notice Value(s)

Tender Value
£8,400,000 £1M-£10M
Lots Value
£8,400,000 £1M-£10M
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
2 Sep 20261 weeks ago
Submission Deadline
6 Oct 20263 weeks to go
Future Notice Date
Not specified
Award Date
Not specified
Contract Period
4 Jan 2027 - 5 Jan 2029 2-3 years
Recurrence
Not specified

Notice Status

Tender Status
Active
Lots Status
Active
Awards Status
Not Specified
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
Department for Energy Security & Net Zero
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
SW1A 2HP
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

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

View full OCDS Record for this contracting process

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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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