| Company | Timeline | Status | |
| Data Talks Limited Secretary • Unreported | 2 Sep 2002←2 Years 12 Months→30 Aug 2005 | Active | |
| Reaction Designs Limited Director • Engineer | 9 May 2000←23 Years→23 Apr 2024 | Dissolved | |
| Reaction Engines Limited Director • Technical Director | 31 Dec 1991←23 Years→1 Dec 2015 | In Administration | |
| Reaction Engines Limited Secretary • Unreported | 31 Dec 1991←10 Years→1 Feb 2002 | In Administration | |
