| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Cambridgeshire Custodial Services Ltd | 03931288 | 11/05/2000 | 02/07/2003 | Dissolved |
| KILMARNOCK PRISON SERVICES LIMITED | 03226951 | 11/05/2000 | 02/07/2003 | Amber |
| Kilmarnock Prison (Holdings) Ltd | 03443465 | 11/05/2000 | 02/07/2003 | Dissolved |
| LOWDHAM GRANGE PRISON SERVICES LIMITED | 03154430 | 11/05/2000 | 02/07/2003 | Amber |
| MEDOMSLEY TRAINING SERVICES LIMITED | 03488633 | 11/05/2000 | 02/07/2003 | Dissolved |
| MORETON PRISON SERVICES LIMITED | 03471077 | 11/05/2000 | 02/07/2003 | Bronze |
| Medomsley Holdings Ltd | 03488629 | 11/05/2000 | 02/07/2003 | Dissolved |
| Moreton Prison (Holdings) Ltd | 03471078 | 11/05/2000 | 02/07/2003 | Dissolved |
| PREMIER CUSTODIAL FINANCE LIMITED | 03849244 | 11/05/2000 | 02/07/2003 | Amber |
| PREMIER CUSTODIAL INVESTMENTS LIMITED | 03849142 | 11/05/2000 | 02/07/2003 | Bronze |
| PREMIER PRISON SERVICES LIMITED | 02733334 | 11/05/2000 | 02/07/2003 | Dissolved |
| PUCKLECHURCH CUSTODIAL SERVICES LIMITED | 03403669 | 11/05/2000 | 02/07/2003 | Amber |
| Premier Custodial Development Ltd. | 02867337 | 01/01/2001 | 04/01/2008 | Dissolved |
| Premier Custodial Group Ltd | 03849249 | 11/05/2000 | 02/07/2003 | Dissolved |
| Premier Detention Services Ltd | 03931282 | 11/05/2000 | 02/07/2003 | Dissolved |
| Premier Monitoring Services Ltd | 03522756 | 11/05/2000 | 02/07/2003 | Dissolved |
| Premier Training Services Ltd | 03488626 | 11/05/2000 | 02/07/2003 | Dissolved |
| SERCO GEOGRAFIX LIMITED | 03522659 | 11/05/2000 | 02/07/2003 | Dissolved |
| Serco Insurance Services Ltd | 03471126 | 11/05/2000 | 02/07/2003 | Dissolved |
| THE GEO GROUP LIMITED | 05864435 | 03/07/2006 | 04/01/2008 | Bronze |
| THE GEO GROUP UK LTD | 02878845 | 01/01/2001 | 04/01/2008 | Gold |