| Company | Timeline | Status | |
| Michael E. Prewett Mechanical Services Limited Director • Plumbing Engineer | 5 Feb 2013←5 Years→30 Nov 2018 | Dissolved | |
| British Taekwondo Council Director • None | 3 Nov 2010←13 Years→13 Dec 2023 | Active | |
| ITF Wales Limited Director • Plumber | 15 Sep 2004←21 Years→Current | Active | |
| ITF Wales Limited Director • Plumber | 15 Sep 2004←20 Years→31 Aug 2025 | Active | |
