| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Linemicro Ltd | 03110321 | 31/05/2003 | Dissolved |
| Pipeworks Ltd | 02782528 | 31/05/2003 | Dissolved |
| SUSSEX COUNTRYSIDE TRUST | 07780611 | 20/09/2011 | Dissolved |
| Southern Science Ltd | 02315401 | 31/05/2003 | Dissolved |
| Southern Water Mirror Image Pension Trustees Ltd | 02484271 | 20/10/1999 | Dissolved |
| Southern Water Technologies Ltd | 02548074 | 31/05/2003 | Dissolved |
| Taylor,E S,(Worthing) Holdings Ltd | 01233568 | 31/05/2003 | Dissolved |
| Tes Environmental Services Ltd | 02143520 | 31/05/2003 | Dissolved |
| Timber Clear Ltd | 02931303 | 31/05/2003 | Dissolved |
| Water Working Ltd | 03026950 | 31/05/2003 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BOWSPRIT HOLDINGS LIMITED | 02533888 | 31/05/2003 | 17/03/2005 | Not Trading |
| BOWSPRIT PROPERTY DEVELOPMENT LIMITED | 02357525 | 31/05/2003 | 17/03/2005 | Silver |
| Coastal Wastewater Consultants Ltd | 02633666 | 30/05/2003 | 17/03/2005 | Dissolved |
| ECOCLEAR LIMITED | 02631521 | 31/05/2003 | 17/03/2005 | Not Trading |
| East Sussex Economic Partnership Ltd | 05479902 | 14/06/2005 | 30/04/2009 | Dissolved |
| James Leppard & Sons Ltd | 00587478 | 31/05/2003 | 17/03/2005 | Dissolved |
| MONK RAWLING LIMITED | 02354957 | 31/05/2003 | 17/03/2005 | Not Trading |
| Pipeworks Ltd | 02782528 | 16/12/1996 | 08/11/1999 | Dissolved |
| SOUTHERN WATER (NR) HOLDINGS LIMITED | 04772485 | 09/07/2003 | 17/03/2005 | Silver |
| SOUTHERN WATER (NR) LIMITED | SC215844 | 23/04/2002 | 17/03/2005 | Silver |
| SOUTHERN WATER EXECUTIVE PENSION SCHEME TRUSTEES LIMITED | 02540169 | 01/10/1996 | 17/03/2005 | Not Trading |
| SOUTHERN WATER INDUSTRIES LIMITED | 02317996 | 31/05/2003 | 17/03/2005 | Not Trading |
| SOUTHERN WATER INVESTMENTS LIMITED | 04650294 | 07/05/2003 | 17/03/2005 | Amber |
| SOUTHERN WATER LIMITED | 02366620 | 10/10/1996 | 17/03/2005 | Silver |
| SOUTHERN WATER PENSION TRUSTEES LIMITED | 02484273 | 17/04/1998 | 17/03/2005 | Not Trading |
| SOUTHERN WATER SERVICES FINANCE PLC | 03530752 | 16/01/2002 | 17/03/2005 | Dissolved |
| SOUTHERN WATER SERVICES GROUP LIMITED | 04374956 | 23/04/2002 | 17/03/2005 | Gold |
| SOUTHERN WATER SERVICES LIMITED | 02366670 | 01/04/1992 | 17/03/2005 | Silver |
| SWS GROUP HOLDINGS LIMITED | 04324498 | 10/12/2001 | 17/03/2005 | Gold |
| SWS HOLDINGS LIMITED | 04324499 | 10/12/2001 | 17/03/2005 | Gold |
| Scottishpower Group Money Purchase Pension Scheme Ltd | 03015081 | 01/09/1998 | 31/03/2004 | Dissolved |
| Southern Science Ltd | 02315401 | 30/11/1996 | 30/09/1999 | Dissolved |
| Taylor Plant & Haulage Ltd | 01195753 | 31/05/2003 | 17/03/2005 | Dissolved |
| The Water Services Association of England & Wales | 01710723 | 03/01/1996 | 09/04/1997 | Dissolved |
| UK WATER INDUSTRY RESEARCH LIMITED | 02862807 | 07/03/1996 | 07/05/1997 | Bronze |
| UTILITIES AND SERVICE INDUSTRIES TRAINING LIMITED | 01741451 | 10/10/2001 | 16/07/2003 | Dissolved |
| WATER UK | 03539600 | 16/05/2001 | 19/01/2005 | Silver |
| WATERAID | 01787329 | 06/12/2000 | 05/10/2006 | Silver |