| Company | Timeline | Status | |
| Mainline Operations Limited Director • Company Director | 20 Mar 2025←8 Months→Current | Active | |
| Southern Locomotives Hire Limited Director • Company Director | 18 Nov 2015←10 Years→Current | Active | |
| Southern Locomotives Engineering Limited Director • Company Director | 4 Aug 2000←25 Years→Current | Active | |
| Supersonic Travel Limited Director • Director Of Company | 11 May 1992←22 Years→31 May 2014 | Dissolved | |
| Southern Locomotives Limited Director • Retired | 12 Mar 1991←34 Years→Current | Active | |
| Hypersonic Travel Limited Director • Company Director | 5 Mar 1991←23 Years→11 Nov 2014 | Dissolved | |
