| Role | Company | Country | Status | Date Range |
|---|---|---|---|---|
| Officer | H.S. HIRE AND SALES LIMITED | 🇬🇧Regno Unito | Active | 10/03/2026 – present |
| Officer | H.S. HOLDINGS (SW) LIMITED | 🇬🇧Regno Unito | Dissolved | 13/04/2026 – present |
| Officer | LISTER PETTER IPR HOLDINGS LIMITED | 🇬🇧Regno Unito | Active | 21/04/2026 – 27/01/2022 |
| Officer | SLEEMAN & HAWKEN POWER SYSTEMS LIMITED | 🇬🇧Regno Unito | Active | 09/04/2026 – present |
| Officer | K MASON HOLDINGS LIMITED | 🇬🇧Regno Unito | Active | 23/04/2026 – present |
| Officer | SLEEMAN & HAWKEN LIMITED | 🇬🇧Regno Unito | Active | 07/04/2026 – present |
| Person with significant control | MASON DEVELOPMENTS LIMITED | — | Active | 21/06/2024 – present |
| Officer | MASON DEVELOPMENTS LIMITED | — | Active | 02/02/2026 – present |
02/05/2023
appointed
27/01/2022
resigned
18/02/2011
appointed