| Company | Timeline | Status | |
| BH Blackwell Limited Director • Company Director  | 29 Sep 2006←5 Months→8 Mar 2007  | Active  | |
| Blackwell (Trustees) Limited Director • Company Director  | 29 Sep 2006←5 Months→8 Mar 2007  | Active  | |
Parker & Son Limited Director • Company Director  | 29 Sep 2006←5 Months→8 Mar 2007  | Dissolved  | |
| Blackwell UK Limited Director • Company Director  | 28 Jun 2006←8 Months→8 Mar 2007  | Active  | |
Blackwell's Book Services Limited Director • Company Director  | 6 Feb 2006←1 Year 1 Month→8 Mar 2007  | Dissolved  | |
| Blackwell Limited Director • Company Director  | 6 Feb 2006←1 Year 1 Month→8 Mar 2007  | Active  | |
| Kalahari Diamonds Limited Director • Accountant  | 10 Sep 2002←2 Years→30 Sep 2004  | Active  | |
Gala Four Limited Director • Chartered Accountant  | 18 Dec 1998←27 Days→14 Jan 1999  | Dissolved  | |
2015 GC Limited Director • Chartered Accountant  | 18 Dec 1998←27 Days→14 Jan 1999  | Dissolved  | |
| R.D.Trading Limited Director • Director  | 23 Feb 1998←5 Months→11 Aug 1998  | Active  | |
