| Company | Headquarters / Registered Office | Nature of Business | Rank | Map |
| HAWKSWELL DRILLING AND TESTING SERVICES LTD |
CHANCERY COURT LINCOLNS INN, LINCOLN ROAD CRESSEX BUSINESS PARK HIGH WYCOMBE HP12 3RE |
4512 - Test drilling and boring 4521 - General construction & civil engineering |
0 |
| Level 1 |
Construction |
| Level 2 |
Specialised construction activities |
| Level 3 |
Demolition and site preparation |
| Level 5 |
Site preparation Test drilling and boring |