| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BROADWAY 98 LIMITED | 07424511 | 29/10/2010 | Dissolved |
| BUILDING SERVICES RESEARCH AND INFORMATION ASSOCIATION(THE) | 00632760 | 13/10/2005 | Bronze |
| Icon Photography Ltd | 05024002 | 06/04/2005 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BSRIA LIMITED | 03942728 | 13/10/2005 | 20/10/2022 | Bronze |
| WSP BUILDINGS LIMITED | 02859678 | 01/01/1998 | 31/12/1998 | Dissolved |
| WSP CEL LIMITED | 03877626 | 07/11/2007 | 11/07/2011 | Dissolved |
| WSP EUROPE LIMITED | 04113909 | 18/12/2000 | 03/09/2012 | Dissolved |
| WSP FULCRUM LIMITED | 02584791 | 02/08/1999 | 10/07/2000 | Dissolved |
| WSP LONDON LIMITED | 02813014 | 01/01/1997 | 31/12/1998 | Dissolved |
| WSP MANAGEMENT SERVICES LIMITED | 02454665 | 01/08/1995 | 01/08/1997 | Silver |
| WSP UK LIMITED | 01383511 | 01/01/1999 | 30/04/2010 | Gold |