| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Leigh Instruments (U K Holdings) Ltd | 00522648 | 30/07/2002 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALLARD WAY (HOLDINGS) LIMITED | 00144140 | 08/01/2003 | 30/09/2003 | Dissolved |
| ASSOCIATED ELECTRICAL INDUSTRIES LIMITED | 00062919 | 12/10/2001 | 18/03/2002 | Gold |
| Associated Electrical Industries Holdings Ltd | 00540660 | 12/10/2001 | 30/09/2003 | Dissolved |
| CANNING HOUSE LIMITED | 03317927 | 28/07/1998 | 27/10/1998 | One Red Flag |
| ENGLISH ELECTRIC COMPANY,LIMITED(THE) | 00152250 | 22/01/2001 | 01/03/2001 | Gold |
| HISPANIC AND LUSO BRAZILIAN COUNCIL(THE) | 00383775 | 27/04/1995 | 28/03/2002 | Silver |
| IRANO-BRITISH AIRPORTS CONSORTIUM LIMITED | 00924657 | 18/08/1993 | 30/09/2003 | Dissolved |
| M (2003) PLC | 03846429 | 25/09/2003 | 03/09/2007 | Dissolved |
| M (DGP1) LIMITED | 03545378 | 06/03/2003 | 30/09/2003 | Dissolved |
| M (DGP2) LIMITED | 03545363 | 07/04/1999 | 30/09/2003 | Dissolved |
| M COMMUNICATIONS INTERNATIONAL HOLDINGS LIMITED | 02204070 | 09/09/2003 | 30/09/2003 | Gold |
| PLESSEY HOLDINGS LIMITED | 00609503 | 12/01/2000 | 30/04/2007 | Amber |
| PLESSEY-UK LIMITED | 00079061 | 12/01/2000 | 07/02/2011 | Insolvent |
| Plessey Overseas Ltd | 00750585 | 12/01/2000 | 30/04/2007 | Dissolved |
| RAILSITE LIMITED | 04042640 | 07/11/2002 | 24/02/2003 | One Red Flag |
| ROADSIDE TECHNOLOGY SERVICES LIMITED | 00487190 | 08/01/2003 | 30/09/2003 | Bronze |
| Rural Radio Systems Ltd | 02938698 | 10/07/1998 | 15/12/1998 | Dissolved |
| TELENT LIMITED | 00067307 | 12/10/2001 | 26/11/2001 | Silver |
| THE PLESSEY COMPANY LIMITED | 00203848 | 12/01/2000 | 30/04/2007 | Dissolved |
| WEST SURREY GOLF CLUB COMPANY, LIMITED | 00105111 | 19/04/2004 | 17/04/2013 | Silver |