| Company | Timeline | Status | |
| Simon Light Limited Director • Motor Engineer | 25 Oct 1993←7 Years→4 Apr 2001 | Active | |
| M.J. Warner (Holdings) Limited Director • Motor Engineer | 18 May 1991←34 Years→Current | Active | |
| SDP (Newmarket Bodyworks) Limited Director • Motor Engineer | 18 May 1991←19 Years→20 Jul 2010 | Active | |
| SDP (Newmarket Motors) Limited Director • Motor Engineer | 18 May 1991←19 Years→20 Jul 2010 | Active | |
