| Company | Timeline | Status | |
Trackside Publications Limited Director • Engineer And Consultant | 1 Oct 1995←8 Years→9 Aug 2004 | Dissolved | |
| Facet Filtration UK Limited Director • Engineer | 28 Jan 1992←4 Months→31 May 1992 | Active | |
| Perry Equipment (UK) Ltd Director • Engineer | 28 Jan 1992←4 Months→31 May 1992 | Liquidation | |
| Michael Duffy (Consultancy) Limited Limited Director • Engineer/management Consultant | 24 Aug 1991←12 Years→9 Aug 2004 | Dissolved | |
