| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Cornerstone Developments (Watford) Ltd | 02285294 | 20/09/1991 | Dissolved |
| Redbourn (Greyfriars) Llp | OC303743 | 22/01/2003 | Dissolved |
| Redbourn (Stafford) Ltd | 04609731 | 05/12/2002 | Dissolved |
| Watling House Developments Ltd | 02443708 | 20/09/1991 | Dissolved |
| Zincman Properties Ltd | 02402466 | 20/09/1991 | Dissolved |
| Zincnote Properties Ltd | 02402467 | 20/09/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BRACKMILL PROPERTIES LIMITED | 04731000 | 20/05/2003 | 15/12/2003 | Dissolved |
| MACINTYRE CARE | 00894054 | 16/12/1992 | 19/04/2012 | Silver |
| POWERTRAVELLER LTD | 02047311 | 23/02/1992 | 18/12/2015 | Dissolved |
| REDBOURN GROUP LIMITED | 02206807 | 20/09/1991 | 30/11/2009 | Silver |
| RSA INSURANCE GROUP LIMITED | 02339826 | 10/07/2003 | 08/05/2014 | Silver |
| Sona Group Ltd | 04253301 | 29/07/2003 | 31/12/2003 | Dissolved |