| Company | Timeline | Status | |
| Horne Planning Limited Director • Director | 21 Jul 2017←4 Years→12 Oct 2021 | Dissolved | |
| Horne Development Limited Director • Director | 21 Jul 2017←1 Day→21 Jul 2017 | Dissolved | |
| Derek Horne And Associates Limited Director • Town Planner | 1 Jul 1992←33 Years→Current | Active | |
