| Company | Timeline | Status | |
| Resource Use Institute Limited Secretary • Unreported | 11 Nov 1991←34 Years→Current | Active | |
| Central Admin Services Limited Secretary • Unreported | 3 Nov 1990←35 Years→Current | Active | |
| Roneval Quarries Limited Secretary • Unreported | 8 Aug 1989←20 Years→15 Sep 2009 | Active | |
| Cavernpower Limited Secretary • Unreported | 8 Aug 1989←15 Years→7 Jan 2005 | Active | |
| Central Admin Services Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
