| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Cuthbert Heath Holdings Ltd | 02185583 | 19/06/1991 | Dissolved |
| Cuthbert Heath Underwriting Ltd | 01885144 | 06/06/1991 | Dissolved |
| Dominion Insurance Systems Ltd | 02748561 | 06/07/1995 | Dissolved |
| Fondiaria (U K) Holdings Ltd | 02433567 | 14/02/1996 | Dissolved |
| Lanco Management Services Ltd | 00336774 | 11/07/1995 | Dissolved |
| Landel Investment Management Ltd | 00077121 | 28/12/1995 | Dissolved |
| Valleyplace Ltd | 00723386 | 20/12/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ADVENT UNDERWRITING LIMITED | 01227004 | 07/06/1994 | 30/09/1996 | Silver |
| B.D.COOKE AND PARTNERS LIMITED | 00451793 | 10/07/1995 | 11/05/2017 | Silver |
| C.F. & A.U. LIMITED | 00479439 | 11/07/1995 | 11/05/2017 | Not Trading |
| DOMINION INSURANCE HOLDINGS LIMITED | 01175267 | 05/04/1995 | 21/03/2001 | Dissolved |
| LANDEL INSURANCE HOLDINGS LIMITED | 00279985 | 11/07/1995 | 11/05/2017 | Not Trading |
| LIBERTY MUTUAL INSURANCE EUROPE PLC | 01088268 | 20/06/1991 | 30/06/2001 | Dissolved |
| LLOYD'S MARKET ASSOCIATION | 02571285 | 03/01/1992 | 31/12/1992 | Gold |
| Liberty Risk Services Ltd | 02795465 | 03/03/1993 | 30/06/1998 | Dissolved |
| SYNDICATE 138 AGENCY LIMITED | 01814719 | 25/07/1991 | 31/12/1991 | Dissolved |
| THE DOMINION INSURANCE COMPANY LIMITED | SC006851 | 05/04/1995 | 11/05/2017 | Silver |
| TRENT INSURANCE COMPANY LIMITED | 00361687 | 21/05/2010 | 11/05/2017 | Gold |
| UNDERWRITING MANAGEMENT AGENCY LIMITED | 00540219 | 11/07/1995 | 11/05/2017 | Amber |