| Company | Timeline | Status | |
| Alphaplas International Limited Director • Professor | 5 Jul 2001←24 Years→Current | Active | |
| Surfnet (U.K.) Limited Secretary • Unreported | 2 Oct 2000←25 Years→Current | Active | |
| Surfnet (U.K.) Limited Director • Professor | 7 Sep 1999←26 Years→Current | Active | |
| Ion Coat Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
