| Company | Timeline | Status | |
| The Sheiling Special Education Trust Director • Unreported | 16 Mar 2023←2 Years 7 Months→Current | Active | |
| Castle Hill Court (Parkstone) Limited Director • Author | 11 Oct 2007←4 Years→14 Mar 2012 | Active | |
Mind Chi Ltd Director • Creator | 29 Mar 2006←9 Years→12 May 2015 | Dissolved | |
The World Memory Championships Limited Director • Company Director | 25 Sep 2002←3 Years→14 Jul 2006 | Dissolved | |
| The Brain Trust Limited Director • Managing Director | 15 May 1992←14 Years→7 Feb 2007 | Active | |
Vanda North Limited Director • Brain Trainer | 4 Aug 1991←23 Years→5 May 2015 | Dissolved | |
Vanda North Limited Secretary • Unreported | 4 Aug 1991←15 Years→16 Jan 2007 | Dissolved | |
