| Company | Timeline | Status | |
| Heydon Boreas Limited Director • Heating Engineer | 17 Jan 2014←10 Years→5 Apr 2024 | Dissolved | |
| Heydon Pierre Limited Director • Heating & Ventilating Engineer | 23 Jan 2012←13 Years→Current | Active | |
C. D. Stone (Dunstable) Limited Director • Heating & Ventilation Engineer | 22 Oct 1991←23 Years→10 Jun 2015 | Dissolved | |
