Confirmed companies include

Act Sustainably Limited
ActionAid UK
Admiral Group
Alpine Fire Engineers
Apave Climate
AtlasCopco Group
Aviva
AWE
AXA Altitude
BAFTA Albert
B. Braun Medical
BDO UK
Beyondly Global Ltd
BSI
Business In The Community Ireland
Cadent
Canopy
Carbon Trust
Chronos Sustainability Ltd
Clarion Housing Group
Coca-Cola Europacific Partners
Consilient Health (UK) Ltd
DwyerOmega
Ferrero 
FIS
Fittleworth Medical
Fixfast Ltd
Forster Communications
Golden Acrefoods
Greater London Authority
Green Finance Institute
Grosvenor
HelloFresh
Intertek UK
Little Moons
LUSH
Menzies LLP
Natura 
NEOM Wellbeing
NHS Supply Chains
NTR plc
Planet Mark
Screwfix
Shell
Sightsavers
Spirax Group plc
Sthree
Suma Wholefoods
Syngenta Crop Protection AG
The Compleat Food Group
The P&M Group Limited
TNFD
Tops Day Nurseries Limited
Transport for London
UKCEH
University of Exeter
Useful Projects
Winvic Construction
Wonderfield Group

Confirmed job roles include

Associate Director
Biofuels Sustainability Manager
Buying Co-ordinator
Carbon Manager
Climate Lead
Commercial Director
Corporate Campaigner
Corporate Partnerships Manager
Data & Sustainability  Manager
Director
Engagement Lead
Environmental Associate
Environmental Executive
Environmental Specialist
ESG and Procurement Business Partner Manager
ESG Director
Founder & CEO
Global Ambassador 
Global Head of ESG
Global lead Sustainability engagement and communication
Global Sustainability Commercial Lead 
Group Sustainability Manager
Group Sustainable Sourcing Manager
Head of Compliance
Head of Consultancy and International
Head of Environment and Resilience
Head of ESG & Sustainability
Head of Group CSR and Sustainability
Head of Group Procurement
Head of Industry Sustainability
Head of Procurement
Head of Responsible Business
Head of Supply Chain
Head of Sustainability
Learning Programme Manager
NDC Dispensing Manager
Net Zero Advisor
Net Zero Supply Chain Manager
Operational Carbon Assistant
Procurement Manager
Purchasing Manager
Purchasing Supervisor
Responsible Procurement
Responsible Procurement Manager
Responsible Sourcing Specialist
Senior Private Sector Partnerships Specialist
Senior Account Executive
Senior Private Sector Partnerships Specialist
Senior Purpose & Inclusion Manager
Senior Sustainability Coordinator
Supplier Relationship Assurance Manager
Supply chain sustainability lead
Sustainability Engagement Manager
Sustainability Manager
Sustainable Supply Chain Coordinator
UK & IE Sustainability Manager
Taskforce Member
Vice-President, Sustainability