| Company | Timeline | Status | |
| Knightvalley Property Management Limited Secretary • Unreported  | 10 Dec 2007←10 Years→19 Jun 2018  | Active  | |
Kenneth Powell Limited Director • Writer  | 22 Aug 2006←13 Years→11 Feb 2020  | Dissolved  | |
| Architectural Association (Incorporated) Director • Writer  | 10 Jun 2002←9 Years→31 May 2012  | Active  | |
Buildings At Risk Trust Director • Writer Journalist  | 21 Dec 1993←14 Years→30 Jul 2008  | Dissolved  | |
| Knightvalley Property Management Limited Director • Journalist  | 6 Dec 1990←34 Years→Current  | Active  | |
