AB-InBev
ADE
AECOM
Airvolutionenergy
Arup
Baxi Heating
BESA
BP
BRE
British Sugar
Buglass Energy Advisory
Bulb Energy
CIBSE
Citizens Advice
Community Energy England
Cornwall Energy
CRA International
Daikin
Durham Energy Institute
Elexon
ENA
Energy and Utilities Alliance
Energy Industries Council
Energy Institute
Energy UK
Enertek Intl
ESB
Falck Renewables
Good Energy
HIES – The Home Insulation & Energy Systems Quality Assured Contractors Scheme
Hill & Knowlton Strategies
Lancaster University
Low Carbon Contracts Company
MHP Communications
ND Metering Solutions
NEA
National Energy Foundation
Northern Gas Networks
Northern Powergrid
OFTEC
Origami Energy
Orsted
PB Power
Renewable Energy Association - REA
Ricardo AEA Technology
RSPB
Scottish Power Renewables
Schneider Electric
Shell
Siemens 
SmartestEnergy
Smart Energy GB
Solar Trade Association
Southampton University
Sustainable Energy Association
Taylor Keogh
The Crown Estate
Trilliant Networks (UK)
UK CCS Research Centre (Sheffield University)
UK Energy Research Centre
UK Power Networks
UK Power Reserve
Viessmann
Viridor
Which?
Worcester Bosch Group
WWF-UK