| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| DOUGLAS OAKERVEE CONSULTING ENGINEERS LTD | 06884728 | 22/04/2009 | Bronze |
| Douglas Oakervee Consulting Engineers Ltd | 04466800 | 21/06/2002 | Dissolved |
| THE THAMES ESTUARY RESEARCH AND DEVELOPMENT COMPANY LIMITED | 07010878 | 07/09/2009 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CROSSRAIL LIMITED | 04212657 | 13/12/2005 | 31/05/2009 | Silver |
| ENGINEERS AGAINST POVERTY | 03613056 | 01/02/2000 | 31/12/2010 | Amber |
| HIGH SPEED TWO (HS2) LIMITED | 06791686 | 01/04/2012 | 31/12/2013 | Silver |
| ICE BENEVOLENT FUND | 06708655 | 01/01/2013 | 31/12/2015 | Silver |
| LIGHTHOUSE CONSTRUCTION INDUSTRY CHARITY | 08244118 | 08/10/2012 | 13/03/2017 | Bronze |
| LONDON GATEWAY PORT LIMITED | 04341592 | 07/07/2005 | 30/06/2006 | Amber |
| THOMAS TELFORD (HOLDINGS) LIMITED | 01091299 | 19/12/2000 | 04/11/2003 | Dissolved |
| THOMAS TELFORD LIMITED | 02556636 | 03/11/1998 | 05/11/2002 | Amber |