Sustainability consultancy contracts

• The five suppliers that won the most sustainability consultancy contracts took 24% of them (19 of 78).
• The median contract, £36k, is 56% below the median across consulting & accountancy contracts (£80k).
• London had the most contracts: 23, or 30% of the total.

1. 1Department for Energy Security and Net Zero (DESNZ)12 contracts£463k
2. 2UK Research and Innovation (UKRI)5 contracts£238k
3. 3West Midlands Combined Authority3 contracts£143k
4. 4Highways England3 contracts£123k
5. 5Homes England3 contracts£73k
6. 6Waste and Resources Action Programme (WRAP)3 contracts£54k
7. 7Environment Agency2 contracts£9.2m
8. 8Department of Agriculture, Environment and Rural Affairs2 contracts£2.5m
9. 9UK Parliament2 contracts£159k
10. 10Walsall Housing Group2 contracts£83k

1. 1Aether Limited6 contracts£228k
2. 2WSP4 contracts£159k
3. 3Eunomia Research & Consulting Ltd3 contracts£9.1m
4. 4Arup3 contracts£295k
5. 5Mott MacDonald3 contracts£140k
6. 6Arcadis3 contracts£98k
7. 7Ridge Environmental Limited3 contracts£54k
8. 8Deloitte2 contracts£229k
9. 93ADAPT Limited2 contracts£71k
10. 10ACCLARO ADVISORY2 contracts£56k

Latest

• LTC Zero Emissions Advisory Services (official notice, opens in a new tab)

  Value not published

  Highways England to Zen in Transition · Awarded 8 September 2026

• S30149 LCOR maintenance, improvements and MCI advisory (official notice, opens in a new tab)

  £94k

  Highways England to WSP · Awarded 7 September 2026

• UNFCCC Review BTR Oman (official notice, opens in a new tab)

  £14k

  Department for Energy Security and Net Zero (DESNZ) to Holly Zhang · Awarded 7 September 2026

• UNFCCC Review BTR Luxembourg (official notice, opens in a new tab)

  £20k

  Department for Energy Security and Net Zero (DESNZ) to WSP · Awarded 3 September 2026

• UNFCCC Review - BTR Belarus (official notice, opens in a new tab)

  £18k

  Department for Energy Security and Net Zero (DESNZ) to Rosemary Brook · Awarded 1 September 2026

• Additional Rapid Adaptation Pathway Assessments (RAPAs) (official notice, opens in a new tab)

  £33k

  West Midlands Combined Authority to Climate Sense · Awarded 25 August 2026

• W5094 The Development of a Community Climate Action Plan for Walsall (official notice, opens in a new tab)

  £35k

  Walsall Council e-Tendering to SLR Consulting · Awarded 24 August 2026

• Request for Information (RFI): Climate Risk Analysis Scenario Modelling & Physical Risk Assessment (official notice, opens in a new tab)

  £79k

  NATIONAL WEALTH FUND LIMITED to SmartResilience Ltd · Awarded 19 August 2026

• UNFCCC Reviews - In-Country BTR of Algeria, Germany, Cyprus, Zambia (official notice, opens in a new tab)

  £95k

  Department for Energy Security and Net Zero (DESNZ) to Aether Limited · Awarded 18 August 2026

• WMCA'S TRANSPORT SYSTEM PREPAREDNESS FOR CLIMATE CHANGE AND THE DEVELOPMENT OF AN EVIDENCE BASE FOR TRANSPORT CLIMATE ADAPTATION (official notice, opens in a new tab)

  £75k

  West Midlands Combined Authority to Mott MacDonald · Awarded 13 August 2026

Largest

• ES RDE 061 - Net Zero Carbon Modelling Commission (official notice, opens in a new tab)

  £9.0m

  Environment Agency to Eunomia Research & Consulting Ltd · Awarded 20 July 2026

• ID 5956194 DAERA - Agricultural Policy Division - The Carbon Footprinting Project (official notice, opens in a new tab)

  £2.5m

  Department of Agriculture, Environment and Rural Affairs to SANS SOUCI CONSULTING LIMITED · Awarded 12 June 2026

• ESG Services (official notice, opens in a new tab)

  £1.0m

  Post Office Limited to KPMG · Awarded 7 July 2026

• UKETS Verification Services (official notice, opens in a new tab)

  £301k

  Ministry of Defence to British Standards Institution (BSI) · Awarded 28 July 2026

• NE - CDF - Lot 1 - West Yorkshire Adaption Pathway Design and Deliver Phase (official notice, opens in a new tab)

  £217k

  Environment Agency to Arup · Awarded 12 October 2025

Climate and sustainability consultants who measure an organisation's, area's or supply chain's emissions and set how it will cut them, adapt to climate risk and meet wider sustainability and ESG goals: greenhouse gas inventories and carbon reporting, net zero and carbon reduction strategies and action plans, abatement cost analysis, climate risk and adaptation plans and sustainability and ESG frameworks.

• Carbon neutral strategy report
• Marginal abatement cost curve analysis
• Net zero support programme for a supply chain
• Scope 3 emissions assessment
• Carbon reporting and accounting advice
• Expert review of a greenhouse gas inventory, including national inventories
• ESG advisory
• Sustainability baseline of working practices
• Environmental and sustainability frameworks
• Adaptation pathways planning
• Climate risk assessment
• Research into net zero and retrofit finance options

• Building-level energy audits and decarbonisation plans (see Energy audits and building decarbonisation plans)
• Area energy plans and generation or grid feasibility (see Local area energy planning and energy infrastructure feasibility)
• Fleet decarbonisation and EV strategy (see Fleet decarbonisation and EV strategy)
• Flood risk and drainage engineering (see Flood risk assessment)
• Corporate strategy without a climate focus (see Strategy development)
• Social value strategy and measurement (see Social value strategy and measurement)
• Technology innovation needs assessments (see Engineering research)
• Carbon management software (see it software (it.estates.energy and carbon management))
• Ecology, environmental impact and waste strategy (see Waste & Environment)
• Chargepoint installation (see construction trades (con.energy.ev chargepoints))
• Fleet management (see Transport & Logistics)

• Local area energy planning

• Technical assurance
• Market analysis