| Company | Timeline | Status | |
| Northumberland Wildlife Trust Limited Director • Farmer | 9 Nov 1994←5 Years→23 May 2000 | Active | |
| Wark Farm Limited Director • Landowner Farmer | 19 Jan 1992←10 Years→16 Dec 2002 | Active | |
| College Valley Estates Limited Director • Landowner | 24 Dec 1991←18 Years→19 Nov 2010 | Active | |
| Hanover Finance Limited Director • Landowner/farmer | 22 Dec 1991←10 Years→16 Dec 2002 | Dissolved | |
| The Callaly Estates Company Limited Director • Landowner And Farmer | 29 Dec 1990←19 Years→7 Apr 2010 | Active | |
| The Callaly Estates Company Limited Director • Unreported | 1 Jan 1970←40 Years→7 Apr 2010 | Active | |
