| Rol | Empresa | País | Estado | Período |
|---|---|---|---|---|
| Cargo | A.R. BUILDING SERVICES (LEEDS) LIMITED | 🇬🇧United Kingdom | Disuelta | 5/6/2026 – 6/10/2010 |
| Cargo | GTR LABS-SERVICES LIMITED | 🇬🇧United Kingdom | Disuelta | 6/6/2026 – presente |
| Cargo | EPAQ SYSTEMS LIMITED | 🇬🇧United Kingdom | Activa | 10/6/2026 – 17/8/2010 |
| Cargo | A & S SCIENTIFIC LIMITED | 🇬🇧United Kingdom | Activa | 13/6/2026 – 13/7/2010 |
| Cargo | MOSAIC SCIENTIFIC LIMITED | — | Disuelta | 13/6/2026 – 30/8/2010 |
| Cargo | A.F.JOHNSON CONSULTING LIMITED | 🇬🇧United Kingdom | Activa | 20/5/2026 – 1/3/2010 |
| Cargo | SYKE LANE PROPERTIES LIMITED | 🇬🇧United Kingdom | Activa | 23/3/2026 – 23/3/2026 |
| Cargo | KING ANALYTICAL LIMITED | 🇬🇧United Kingdom | Activa | 3/4/2026 – 22/4/2004 |
| Cargo | SYKE LANE PROPERTIES LIMITED | 🇬🇧United Kingdom | Activa | 23/3/2026 – 23/3/2026 |
| Cargo | SCIENCE WAREHOUSE LIMITED | 🇬🇧United Kingdom | Liquidación | 19/5/2026 – 20/3/2000 |
23/3/2026
resigned
6/10/2010
resigned
25/1/1994
appointed