| B D Hockin Gas Engineers Ltd |
| B&Q |
| Bank of Ireland UK |
| Baring Insulations Ltd |
| Barnsley Metropolitan Borough Council |
| Barratt Developments |
| Bawden Consulting Ltd |
| Baxi Group |
| BBA |
| BBT Thermotechnology UK Ltd |
| BCD Commercial Solutions |
| BEAMA Ltd |
| Beat the Cold |
| Becta |
| Bedford Concern for the Homeless and Rootless (Bechar) |
| BEKO plc |
| Benfield ATT |
| Berkeley Homes |
| BJB (UK) Ltd |
| Black Country Housing Group Ltd |
| blooming green |
| Borough Council of Ling's Lynn and West Norfolk |
| Bosch UK |
| Bovis Homes |
| BR Testing Ltd |
| BRD Tech Ltd |
| BRE |
| Brent Private Tenants Rights Group |
| Bright Green Energy |
| Brighton and Hove City Council |
| Bristol DEA |
| Bristol Debt Advice Centre |
| British Gas |
| British Gypsum |
| British Plastics Federation Windows Group |
| British Property Federation |
| British Pump Manufacturers' Association (BPMA) |
| British Retail Consortium |
| British Urethane Foam Contractors Association |
| British Woodworking Federation |
| BRUFMA |
| BSkyB |
| Builders Merchant Federation |