| Company | Timeline | Status | |
| Dog Island Productions Limited Director • Screenwriter, Writer Research | 26 Jul 1999←26 Years→28 Oct 2025 | Dissolved | |
| Hamptonhall Limited Director • Writer/researcher | 12 Mar 1995←30 Years→Current | Active | |
| Gloucester Avenue (15-23) Management Company Limited Director • Writer Researcher | 20 Feb 1924←71 Years→10 Dec 1995 | Active | |
