| Company | Timeline | Status | |
| Sumner Group Health R&D Limited Director • Consultant Physician | 1 Apr 2021←10 Months→10 Feb 2022 | Active | |
IDF Commercial Services Limited Director • None | 10 Dec 2009←5 Years→23 Apr 2015 | Dissolved | |
| Vercity Holdings Limited Director • Physician Consultant | 1 Nov 2008←3 Years→31 Dec 2011 | Active | |
| Capital Hospitals (Issuer) Plc Director • Physician Consultant | 15 Feb 2008←9 Years→18 Dec 2017 | Active | |
| Capital Hospitals (Holdings) Ltd Director • Physician Consultant | 15 Feb 2008←9 Years→18 Dec 2017 | Active | |
| Capital Hospitals Ltd Director • Physician Constultant | 15 Feb 2008←9 Years→31 Dec 2017 | Active | |
| Independent Doctors Federation Director • Consultant Respiratory Physici | 18 Apr 2005←10 Months→28 Feb 2006 | Active | |
| British Thoracic Society(The) Director • Physician | 10 Dec 1995←3 Years→31 May 1999 | Active | |
