| Company | Timeline | Status | |
| John Clark (Holdings) Limited Director • General Manager | 8 Sep 1992←11 Months→31 Aug 1993 | Active | |
| Electric Car Store Limited Director • Managing Director | 25 Mar 1988←5 Years→31 Aug 1993 | Active | |
| John Clark (Aberdeen) Limited Director • Unreported | 1 Jan 1970←21 Years→23 Jul 1991 | Active | |
