| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BEALES FERGUSON ASSOCIATES LTD | 07732236 | 08/08/2011 | Bronze |
| Construction T. A. Services (Swindon) Ltd | 01963130 | 07/08/1991 | Dissolved |
| Cta Projects Ltd | 02316440 | 30/09/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 16 HIGHBURY NEW PARK LIMITED | 03846389 | 12/04/2002 | 01/04/2020 | Silver |
| BRE TRUST | 03282856 | 05/08/2009 | 01/08/2016 | Silver |
| STRUCTURAL ENGINEERS REGISTRATION LIMITED | 05251866 | 29/11/2005 | 19/01/2010 | Gold |
| THOMAS TELFORD (HOLDINGS) LIMITED | 01091299 | 01/08/1991 | 23/07/1992 | Dissolved |
| THOMAS TELFORD (RECRUITMENT) LIMITED | 02251029 | 17/01/1996 | 24/03/2010 | Dissolved |
| THOMAS TELFORD LIMITED | 02556636 | 08/11/1992 | 24/10/2012 | Amber |
| THOMAS TELFORD SERVICES LIMITED | 02374942 | 01/12/2000 | 24/03/2010 | Dissolved |
| WATER PUBLICATIONS LIMITED | 02775181 | 01/12/2000 | 24/03/2010 | Dissolved |