| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| AB CONSULTING LIMITED | 01091265 | 15/12/2016 | Dissolved |
| FINANCIAL DECISIONS LIMITED | 02108267 | 15/12/2016 | Dissolved |
| G L HEARN LIMITED | 03798877 | 22/09/2022 | Bronze |
| G L HEARN MANAGEMENT LIMITED | 01984639 | 22/09/2022 | Silver |
| GMA PLANNING LIMITED | 05099270 | 30/04/2019 | Dissolved |
| GRAHAM CONSULTING GROUP LIMITED | 02428039 | 15/12/2016 | Dissolved |
| IDEAS PROJECT ENGINEERING LTD. | 03085684 | 01/03/2017 | Dissolved |
| INDIGO PLANNING LIMITED | 02078863 | 30/04/2019 | Dissolved |
| INTEGRATED BUILDING SERVICES DESIGN PARTNERSHIP LIMITED | 02606296 | 15/12/2016 | Dissolved |
| KIRKBY AT LIMITED | 06255352 | 15/12/2016 | Dissolved |
| MERZ AND MCLELLAN CONSULTING ENGINEERS LIMITED | 03246982 | 25/05/2017 | Dissolved |
| MOUCHEL LIMITED | 01686040 | 12/10/2016 | Bronze |
| OPUS INTERNATIONAL CONSULTANTS (UK) LIMITED | 02847568 | 19/01/2018 | Dissolved |
| OPUS INTERNATIONAL CONSULTANTS HOLDINGS (UK) LIMITED | 02497188 | 19/01/2018 | Dissolved |
| PARSONS BRINCKERHOFF GROUP EMPLOYMENT LIMITED | 09193526 | 09/04/2015 | Dissolved |
| PARSONS BRINCKERHOFF GROUP HOLDINGS LTD | 03515454 | 31/07/2016 | Dissolved |
| PARSONS BRINCKERHOFF HOLDINGS LIMITED | 03640733 | 15/12/2016 | Dissolved |
| PARSONS BRINCKERHOFF INVESTMENTS LIMITED | 03599313 | 31/07/2016 | Dissolved |
| PARSONS BRINCKERHOFF LTD | 02554514 | 09/04/2015 | Bronze |
| PARSONS BRINCKERHOFF OVERSEAS HOLDINGS LTD | 02678235 | 31/07/2016 | Dissolved |
| PB FOUNDATION | 04381297 | 31/07/2016 | Dissolved |
| PB LTD | 00656314 | 09/04/2015 | Not Trading |
| TOWER SURVEYS LIMITED | 03563870 | 09/04/2018 | Dissolved |
| WSP (REAL ESTATE AND INFRASTRUCTURE) LIMITED | 12475960 | 22/09/2022 | Silver |
| WSP BUILDINGS LIMITED | 02859678 | 15/12/2016 | Dissolved |
| WSP CEL LIMITED | 03877626 | 25/05/2017 | Dissolved |
| WSP CIVILS LIMITED | 02430067 | 15/12/2016 | Dissolved |
| WSP ENVIRONMENT & INFRASTRUCTURE SOLUTIONS UK LIMITED | 02190074 | 21/09/2022 | Silver |
| WSP ENVIRONMENTAL LIMITED | 01152332 | 07/01/2013 | Dissolved |
| WSP EUROPEAN HOLDINGS LIMITED | 04121721 | 15/12/2016 | Gold |
| WSP GROUP HOLDINGS LIMITED | 07773599 | 15/12/2016 | Silver |
| WSP HOLDING UK LIMITED | 08100508 | 17/12/2020 | Silver |
| WSP MANAGEMENT CONSULTANTS LIMITED | 05391063 | 13/12/2017 | Strike Off |
| WSP MANAGEMENT SERVICES LIMITED | 02454665 | 11/01/2008 | Silver |
| WSP NORTH LIMITED | 02257665 | 15/12/2016 | Dissolved |
| WSP UK LIMITED | 01383511 | 11/01/2008 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ASSOCIATION FOR CONSULTANCY AND ENGINEERING | 00132142 | 24/01/2018 | 31/12/2020 | Silver |
| WSP DEVELOPMENT AND TRANSPORTATION LIMITED | 02382309 | 02/01/2002 | 10/08/2015 | Dissolved |