| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| LOCH LOMOND & THE TROSSACHS COUNTRYSIDE TRUST | SC422457 | 23/01/2023 | Silver |
| TWEED FORUM LIMITED | SC191466 | 19/06/2009 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BRITISH TRUST FOR ORNITHOLOGY(THE) | 00357284 | 01/01/2000 | 31/12/2003 | Bronze |
| DURHAM WILDLIFE TRUST | 01019263 | 03/11/1994 | 06/11/2000 | Silver |
| FRESHWATER BIOLOGICAL ASSOCIATION(THE) | 00263162 | 19/07/2006 | 12/03/2014 | Silver |
| HOLMEHILL LTD. | SC279947 | 04/06/2009 | 13/11/2018 | Dissolved |
| INCA (PROJECTS) LIMITED | 02722719 | 22/11/1996 | 11/06/2004 | Gold |
| NATIONAL BIODIVERSITY NETWORK TRUST | 03963387 | 07/07/2005 | 10/07/2007 | Silver |
| THE INDUSTRY NATURE CONSERVATION ASSOCIATION | 02345199 | 22/11/1996 | 11/06/2004 | Gold |
| THE RIVER RESTORATION CENTRE | 02904139 | 02/03/1994 | 16/07/1998 | Silver |
| THE SCOTTISH WILDLIFE TRUST | SC040247 | 26/09/2009 | 19/09/2015 | Gold |
| THE WILDFOWL & WETLANDS TRUST | 02882729 | 05/06/2003 | 17/06/2009 | Silver |
| TWEED FORUM LIMITED | SC191466 | 25/11/1998 | 20/04/2001 | Silver |