| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BEMEAD LTD | 09121171 | 08/07/2014 | Dissolved |
| CETEC CONSULTANCY LIMITED | 02229584 | 03/12/2009 | Dissolved |
| CETEC PROJECTS LIMITED | 04489836 | 24/05/2010 | Dissolved |
| COMMERCIAL ACUMEN LIMITED | 10321862 | 10/08/2016 | Dissolved |
| Commercial Acumen Ltd | 05355731 | 07/02/2005 | Dissolved |
| DOY WEBSTER CAD SERVICES LIMITED | 02694700 | 03/12/2009 | Dissolved |
| DOY WEBSTER PARTNERSHIP LIMITED | 03023030 | 03/12/2009 | Dissolved |
| GORDON LEWIS ASSOCIATES LIMITED | 03022194 | 24/05/2010 | Dissolved |
| IMC CONSULTING ENGINEERS LIMITED | 03639972 | 24/05/2010 | Dissolved |
| IMC EUROPE LIMITED | 03195446 | 03/12/2009 | Dissolved |
| IMC TECHNICAL SERVICES LIMITED | 03171053 | 24/05/2010 | Dissolved |
| M V M PLANNING LIMITED | 02195804 | 03/12/2009 | Dissolved |
| TILNEY SIMMONS LIMITED | 02077186 | 03/12/2009 | Dissolved |
| TILNEY, SIMMONS (INTERNATIONAL) LIMITED | 01970127 | 24/05/2010 | Dissolved |
| TP MANAGEMENT LTD | 02269900 | 24/05/2010 | Dissolved |
| WYN THOMAS LIMITED | 02380011 | 24/05/2010 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 14000 & ONE SOLUTIONS LIMITED | 03745047 | 03/12/2009 | 03/05/2011 | Dissolved |
| ARNDALE 22 LIMITED | 08514303 | 04/06/2014 | 31/08/2015 | Dissolved |
| BRITISH EXPERTISE | 00896430 | 19/04/2012 | 28/05/2019 | Amber |
| BRITISH EXPERTISE INTERNATIONAL LIMITED | 09046809 | 04/12/2014 | 28/05/2019 | One Red Flag |
| DOY WEBSTER (HOLDINGS) LIMITED | 03175043 | 03/12/2009 | 03/05/2011 | Dissolved |
| DWP CONSULTING LIMITED | 03682096 | 24/05/2010 | 03/05/2011 | Dissolved |
| ERNEST GREEN PARTNERSHIP LIMITED | 01871269 | 03/12/2009 | 03/05/2011 | Dissolved |
| FARNINGHAM MCCREADIE PARTNERSHIP LIMITED | SC209454 | 03/12/2009 | 03/05/2011 | Dissolved |
| FISHER WILSON PLANNING LIMITED | 03753182 | 03/12/2009 | 03/05/2011 | Dissolved |
| HAWTHORNE KAMM LIMITED | 02066641 | 03/12/2009 | 03/05/2011 | Dissolved |
| IMC MONTAN LIMITED | 08339893 | 30/01/2014 | 31/08/2015 | Gold |
| INTERNATIONAL ECONOMIC & ENERGY CONSULTING LIMITED | 02281002 | 24/05/2010 | 03/05/2011 | Dissolved |
| LONDON LUTON AIRPORT LIMITED | 02020381 | 16/08/2021 | 09/05/2023 | Silver |
| MANAGEMENT CONSULTANTS GROUP LIMITED | 03462585 | 24/05/2010 | 03/05/2011 | Dissolved |
| SAVELL BIRD & AXON LIMITED | 06002232 | 03/12/2009 | 03/05/2011 | Dissolved |
| STRATEGY INTERNATIONAL HOLDINGS LIMITED | 01834782 | 08/08/2016 | 30/05/2017 | One Red Flag |
| TETRA TECH ENVIRONMENT PLANNING TRANSPORT LIMITED | 03050297 | 03/08/2009 | 01/04/2014 | Not Trading |
| TETRA TECH ENVIRONMENTAL AND PLANNING (NORTHERN IRELAND) LIMITED | NI050736 | 03/08/2009 | 28/08/2012 | Not Trading |
| TETRA TECH GROUP LIMITED | 06595608 | 03/08/2009 | 31/08/2015 | Amber |
| TETRA TECH INTERNATIONAL DEVELOPMENT PROJECTS LIMITED | 03195423 | 27/10/2009 | 31/08/2015 | Gold |
| TETRA TECH LIMITED | 01959704 | 03/08/2009 | 01/01/2014 | Silver |
| TETRA TECH MANAGEMENT SERVICES LIMITED | 04807864 | 03/08/2009 | 01/04/2014 | Not Trading |
| TETRA TECH UK CONSULTING GROUP LIMITED | 01869543 | 03/08/2009 | 03/05/2011 | Silver |
| TETRA TECH UK CONSULTING GROUP LIMITED | 01869543 | 03/08/2009 | 31/08/2015 | Silver |
| TWEEDS PROJECT SERVICES LTD. | 03033165 | 24/05/2010 | 03/05/2011 | Dissolved |
| WHITE YOUNG GREEN LIMITED | 05111508 | 24/05/2010 | 03/05/2011 | Not Trading |
| WYG 22 LIMITED | 03076421 | 03/12/2009 | 03/05/2011 | Dissolved |
| WYG ENGINEERING (NORTHERN IRELAND) LIMITED | NI020346 | 03/08/2009 | 28/08/2012 | Insolvent |
| WYG INTERNATIONAL LIMITED | 03195485 | 03/08/2009 | 31/08/2015 | Dissolved |