Open7 days left · closes 5pm, Tuesday 6 October 2026

Climate Ambition Support Alliance Phase 3 (CASA3)

Department for Energy Security & Net Zero · Central government

In brief

Department for Energy Security & Net Zero is looking for suppliers for this contract (UK-wide).

The estimated value is £8,400,000 excluding VAT.

The contract runs for 2 years, up to 3 years with extensions, starting 4 January 2027.

Bids close at 5pm, Tuesday 6 October 2026.

Built from the notice's own fields. Always check the official notice before you bid.

Can I win this?

Key dates

Questions by: 5pm, Wednesday 16 September 2026
Bids by: 5pm, Tuesday 6 October 2026

How bids are scored

Price - Commercial 15% · Quality - Technical 85%

Quality matters most. You can win without being the cheapest.

Competition

Typical: a median of 4 bids per contract for this buyer (from 10 awards in the last 12 months).

What the notice says

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.

Should I bid?

Tick what applies to you. Nothing is saved.

Can you prepare a good bid in 7 days?That is tight, especially for a first bid with this buyer.
Is a contract of about £8,400,000 a size you can deliver?Buyers often check that your turnover is comfortably larger than the yearly contract value.
Can you deliver in locations across the UK?Check the delivery locations in the tender documents.
Can you meet what the notice mentions: Framework agreement?The tender documents will say exactly what is required.
Are you registered on the Central Digital Platform?You need to be registered to take part under the Procurement Act 2023.

How to bid

Read the full notice on Find a Tender, including any tender documents it links to.
Register your organisation on the Central Digital Platform (through Find a Tender) if you have not already. Suppliers need to be registered to take part in procurements under the Procurement Act 2023.
Submit your bid through the buyer's e-tendering portal: www.jaggaer.com.
Send clarification questions before 5pm, Wednesday 16 September 2026.
Make sure your bid arrives before 5pm, Tuesday 6 October 2026. Late bids are usually rejected.

Timeline

2 September 2026Tender notice · UK4, notice 083238-2026

About the buyer

Department for Energy Security & Net ZeroLast 12 months

Procurements

Awards

Suppliers it has used most

Aether Limited5 contracts
United Kingdom National Nuclear Laboratory3 contracts
Arceio Limited2 contracts
BSI Standards Limited2 contracts
Ricardo-Aea Limited2 contracts
University of Manchester2 contracts
AECOM Limited1 contract
British Geological Survey1 contract

All tenders and awards from Department for Energy Security & Net Zero

From notice 083238-2026 on Find a Tender, first published 2 September 2026. We last checked for changes on 28 September 2026.