| Company | Timeline | Status | |
Knollands Products Supplies Ltd Director • Director | 16 Sep 2015←2 Years 3 Months→2 Jan 2018 | Dissolved | |
| The Septic Tank Store Ltd Director • Director | 12 Jan 2001←24 Years→Current | Active | |
| Clarkco Limited Director • Drainage Contractor | 20 Mar 1992←2 Years→21 Mar 1994 | Active | |
| D W Clark (Drainage) Limited Director • Engineer | 13 Feb 1992←2 Years 5 Months→27 Jul 1994 | Active | |
