| Company | Timeline | Status | |
Crownacre Associates Limited Director • Engineer | 29 Oct 1997←21 Years→15 Jan 2019 | Dissolved | |
| Quartic Properties Ltd Director • Engineer | 20 Nov 1991←5 Years→29 Sep 1997 | Active | |
| Quartic Engineering Ltd Director • Engineer | 7 Aug 1991←6 Years→29 Sep 1997 | Active | |
| Quartic Engineering Ltd Secretary • Unreported | 7 Aug 1991←6 Years→29 Sep 1997 | Active | |
