| Company | Timeline | Status | |
| Sumner & Co Ltd Director • Director | 10 May 2013←10 Years→28 Nov 2023 | Dissolved | |
Metronet Rail SSL Limited Director • Head Of Infraco (sub-surface) | 7 Feb 2000←3 Years→28 Mar 2003 | Dissolved | |
| London Underground Limited Director • Director Railway Infrastructur | 3 Jan 1995←6 Years→1 Jan 2001 | Active | |
| TFL Trustee Company Limited Director • Managing Director | 23 Aug 1994←8 Years→10 Jul 2003 | Active | |
