| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Eha 2000 (Trading) Ltd | 03552724 | 02/06/1998 | Dissolved |
| THE CLOTTING CONSULTANCY LIMITED | 04590353 | 14/11/2002 | Dissolved |
| UNICORN DIAGNOSTICS LIMITED | 02427423 | 28/09/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BSH ENTERPRISES LIMITED | 02677826 | 01/04/1992 | 12/02/2009 | Silver |
| BSHT MEETINGS LIMITED | 04507462 | 09/08/2002 | 31/12/2012 | Gold |
| Diagnostic Partnership Ltd (The) | 02792437 | 26/10/1995 | 28/06/2000 | Dissolved |
| INTERNATIONAL COUNCIL FOR STANDARDIZATION IN HAEMATOLOGY | 10940331 | 31/08/2017 | 02/10/2021 | Gold |
| ST.MARY'S SCHOOL,GERRARDS CROSS,LIMITED | 00389663 | 08/11/2000 | 18/01/2018 | Silver |
| THE BRITISH SOCIETY FOR HAEMATOLOGY | 02645706 | 09/04/2003 | 07/04/2007 | Silver |