| Reference Number | Full Name | Occupation | Disciplines | Company | Audit Expiry Date | Status |
|---|---|---|---|---|---|---|
| 0973 | Luke Bamford | Lead Driller | RTY | Dynamic Sampling UK | 2025-01-31 | Audit Expired |
| 0866 | Malcolm Cotterill | Lead Driller | RTY | Arcadis UK | 2026-02-26 | Audited |
| 0965 | Maris Veckagans | Lead Driller | RTY | Structural Soils | 2025-01-23 | Audit Expired |
| 0551 | Mark Bolton | Lead Driller | RTY, DS | BAM Ritchies | 2025-08-21 | Audited |
| 0977 | Mark Buxton | Lead Driller | CP | Infosoil | 2025-02-21 | Audit Expired |
| 0589 | Mark Gillespie | Lead Driller | CP | BAM Ritchies | 2025-04-06 | Audited |
| 0871 | Mark Kelly | Lead Driller | RTY | BAM Ritchies | 2025-11-25 | Audited |
| 0721 | Mark Summerell | Lead Driller | RTY | Geotechnical Engineering | 2025-11-19 | Audited |
| 0940 | Martin Jackson | Lead Driller | SON | Causeway Geotech Ltd | 2025-10-30 | Audited |
| 0790 | Matthew Knocker | Lead Driller | CP | Causeway Geotech Ltd | 2025-11-05 | Audited |
| 0926 | Matthew Leighton | Lead Driller | RTY | Central Alliance | 2026-02-26 | Audited |
| 0923 | Matthew Perry | Lead Driller | CP | ADS Drilling | 2025-11-11 | Audited |
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