| Company | Timeline | Status | |
| Oakwell Products Limited Director • Engineer | 30 Apr 2001←12 Years→17 Dec 2013 | Active | |
| The Roston Iron Foundry Limited Secretary • Unreported | 29 Dec 1991←1 Year 11 Months→16 Dec 1993 | Dissolved | |
| The Roston Iron Foundry Limited Director • Engineer | 29 Dec 1991←1 Year 11 Months→16 Dec 1993 | Dissolved | |
| Roston Castings Limited Director • Directors | 26 Dec 1991←1 Year 10 Months→18 Nov 1993 | Active | |
| Ecam Engineering Limited Director • Engineer | 26 Dec 1991←5 Years→15 Apr 1997 | Active | |
