| Company | Timeline | Status | |
| Chelsea Physic Garden Company(The) Director • Retired | 16 Apr 1996←17 Years→31 Dec 2013 | Active | |
| AGS Expeditions Limited Director • Retired Botanist | 5 Nov 1994←3 Years→8 Nov 1997 | Active | |
| A.G.S. Publications Limited Director • Retired Botanist | 5 Nov 1994←3 Years→8 Nov 1997 | Active | |
| Borde Hill Garden Limited Director • Retired | 13 Dec 1993←3 Years→12 Feb 1997 | Active | |
| Horticultural Halls Limited Director • Director General Rhs | 1 Jan 1993←8 Months→9 Sep 1993 | Active | |
| R.H.S. Enterprises Limited Director • Director General | 11 Jul 1992←1 Year→3 Aug 1993 | Active | |
| Painshill Park Trust Limited Director • Director | 30 Sep 1991←4 Years→3 Jun 1996 | Active | |
