| Company | Timeline | Status | |
| Alan Allison (1980) Limited Director • Surveyor | 30 Sep 2005←20 Years→Current | Active | |
| Alan Allison (1980) Limited Secretary • Surveyor | 30 Sep 2005←20 Years→Current | Active | |
| Alan Allison (1980) Limited Director • Surveyor | 30 Sep 2005←19 Years→11 Jan 2025 | Active | |
| Alan Allison (1980) Limited Secretary • Surveyor | 30 Sep 2005←19 Years→11 Jan 2025 | Active | |
