| Company | Timeline | Status | |
R P + K International Limited Director • Finance Director | 5 Apr 2008←3 Years→2 Aug 2011 | Dissolved | |
| Roger Preston & Partners Limited Director • Finance Director | 5 Apr 2008←3 Years→2 Aug 2011 | Active | |
Roger Preston Limited Director • Finance Director | 5 Apr 2008←3 Years→2 Aug 2011 | Dissolved | |
| Trett Holdings Limited Director • Finance Director | 1 Apr 2008←3 Years→2 Aug 2011 | Active | |
| Trett Contract Services Limited Director • Finance Director | 1 Apr 2008←3 Years→2 Aug 2011 | Active | |
| Trett Limited Director • Finance Director | 1 Apr 2008←3 Years→2 Aug 2011 | Active | |
| Roger Preston Group Limited Director • Director | 31 Mar 2008←3 Years→2 Aug 2011 | Active | |
Whitelaw Turkington Landscape Architects Limited Director • Finance Director | 29 Feb 2008←3 Years→2 Aug 2011 | Dissolved | |
| Sweco UK Limited Director • Finance Director | 1 Sep 2002←8 Years→2 Aug 2011 | Active | |
| Sweco Services UK Limited Director • Finance Director | 1 Sep 2002←8 Years→2 Aug 2011 | Active | |
