| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| WILLIAM IRWIN & CO. (NORTH) LIMITED | 01282450 | 27/06/1991 | One Red Flag |
| William Irwin & Co (East) Ltd | 01282449 | 27/06/1991 | Dissolved |
| William Irwin & Co. (South) Ltd. | 01187155 | 27/06/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 03145905 LIMITED | 03145905 | 07/02/1996 | 10/10/2008 | One Red Flag |
| Campbell & Armstrong (Electrical Services) Ltd | 02326797 | 01/10/1992 | 18/09/1996 | Dissolved |
| IRWINS HOLDINGS LIMITED | 06055706 | 14/06/2007 | 10/10/2008 | Dissolved |