| Company | Timeline | Status | |
| Yorkshire Agricultural Society Director • Retired Professor | 16 Dec 1996←9 Years→12 May 2006 | Active | |
| University Of Leeds Farms Limited Director • University Professor | 25 Apr 1994←2 Years 5 Months→30 Sep 1996 | Dissolved | |
| James Hutton Limited Director • University Professor | 30 Jun 1991←9 Years→25 Jul 2000 | Active | |
The Scottish Crop Research Institute Director • University Professor | 29 Aug 1989←8 Years→31 Mar 1998 | Dissolved | |
