| Company | Timeline | Status | |
| Roger Evans (Harpenden) Ltd Secretary • Chartered Architect | 1 Jul 1998←5 Years→15 Mar 2004 | Dissolved | |
| Anthony Evans & Co Limited Director • Chartered Architect | 3 Nov 1992←23 Years→8 Mar 2016 | Dissolved | |
| Anthony Evans & Co Limited Secretary • Unreported | 3 Nov 1992←17 Years→31 Oct 2009 | Dissolved | |
| Sparrows Herne Development Limited Director • Chartered Architect | 6 Dec 1991←11 Years→1 May 2003 | Active | |
| Sparrows Herne Development Limited Secretary • Unreported | 6 Dec 1991←11 Years→1 May 2003 | Active | |
| St Georges School (Harpenden) Limited Director • Architect | 5 Dec 1991←17 Years→9 Oct 2009 | Active | |
| William Evans (Luton) Limited Director • Chartered Architect | 5 Dec 1991←11 Years→1 May 2003 | Active | |
| William Evans (Luton) Limited Secretary • Unreported | 5 Dec 1991←11 Years→1 May 2003 | Active | |
