| Company | Timeline | Status | |
| Thermocrete Limited Secretary • Unreported | 30 Nov 1991←33 Years→Current | Active | |
| Northern Chimney Lining Systems Limited Secretary • Unreported | 13 Nov 1991←34 Years→Current | Active | |
| Thermocrete Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Northern Chimney Lining Systems Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
