| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Bark Communications International Ltd | 03521524 | 12/03/1998 | Dissolved |
| CHEM TRUST | 05933897 | 31/03/2007 | Silver |
| Kentwood Consulting Ltd. | 04969294 | 19/11/2003 | Dissolved |
| PURLEY PARK TRUST LIMITED | 00989820 | 15/10/2002 | Silver |
| The Environmental Trust for Berkshire Ltd | 03413924 | 04/08/1997 | Dissolved |
| The Pct: Policy & Research Ltd | 02757203 | 17/01/2001 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BERKSHIRE,BUCKINGHAMSHIRE AND OXFORDSHIRE WILDLIFE TRUST | 00680007 | 01/11/2003 | 16/12/2003 | Silver |
| FRESHWATER HABITATS TRUST | 05317683 | 20/12/2004 | 13/07/2011 | Gold |
| FRIENDS OF FUNDE CRUZ | 06382977 | 16/04/2008 | 01/07/2008 | Dissolved |
| MINERVA PARTNERS LLP | OC310976 | 14/01/2005 | 01/02/2007 | Dissolved |
| RIVER THAMES SOCIETY | 01747301 | 14/08/1996 | 24/02/2022 | Gold |
| THE CHARITY FINANCE GROUP | 03182826 | 17/02/1998 | 09/09/2003 | Amber |
| THE WILDFOWL & WETLANDS TRUST | 02882729 | 30/06/2005 | 01/10/2015 | Silver |
| WILDFOWL TRUST (HOLDINGS) LIMITED | 00587114 | 22/06/2006 | 01/10/2015 | Amber |
| WWF-UK | 04016725 | 16/06/2000 | 10/12/2003 | Silver |
| WWF-UK (WORLD WIDE FUND FOR NATURE) TRADING LIMITED | 00892812 | 30/09/1996 | 05/12/2003 | Bronze |