| Role | Company | Country | Status | Date Range |
|---|---|---|---|---|
| Person with significant control | ARTSILL LIMITED | 🇬🇧United Kingdom | Active | 02/10/2025 – present |
| Person with significant control | MTD SPREADSHEET LIMITED | 🇬🇧United Kingdom | Active | 26/06/2024 – present |
| Person with significant control | PMCA LIMITED | — | Active | 26/06/2024 – present |
| Officer | STUDY JUNCTION LTD | 🇬🇧United Kingdom | Active | 26/05/2026 – 01/08/2022 |
| Officer | BX MERCHANDISE LIMITED | — | Dissolved | 05/06/2026 – present |
| Officer | THORBURN COLQUHOUN HOLDINGS LIMITED | 🇬🇧United Kingdom | Active | 02/03/2026 – 05/02/2002 |
| Officer | URS CORPORATION LIMITED | 🇬🇧United Kingdom | Active | 02/03/2026 – 01/11/2001 |
| Officer | WOODWARD-CLYDE LIMITED | 🇬🇧United Kingdom | Liquidation | 02/03/2026 – 30/06/2002 |
| Officer | ARTSILL LIMITED | 🇬🇧United Kingdom | Active | 02/03/2026 – 23/03/2013 |
10/07/2025
appointed
01/08/2022
resigned
09/07/1998
appointed