| Company | Timeline | Status | |
| T. Norton Limited Director • Technical Director | 18 Dec 1991←31 Years→13 Dec 2022 | Dissolved | |
| James W. Shenton Limited Director • Technical Director | 18 Dec 1991←33 Years→Current | Active | |
| Edison Holdings Ltd Director • Technical Director | 18 Dec 1991←33 Years→Current | Active | |
