| Company | Timeline | Status | |
| Tanfield Holdings Limited Director • Unreported | 27 Oct 2016←9 Years→Current | Active | |
| Swantek Limited Director • Unreported | 28 Jun 2002←23 Years→Current | Active | |
| Swantek Limited Secretary • Company Director | 28 Jun 2002←23 Years→Current | Active | |
| Calder Chemicals Limited Secretary • Unreported | 20 Jun 1991←34 Years→Current | Active | |
| Calder Chemicals Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
