| British Medical Association |
1974 |
| British Society of Gastroenterology |
1980 |
| Surgical Research Society |
1981 |
| European Society for Surgical Research |
1981 |
| Pancreatic Society of Great Britain and Ireland |
1981 |
| Fellow of Association of Surgeons of Great Britain and Ireland |
1986 |
| Royal Society of Medicine |
1988 |
| Association of Endoscopic Surgeons of Great Britain and Ireland |
1993 |
| British Association of Endocrine Surgeons |
1994 |
| Association of Upper Gastrointestinal Surgeons of Great Britain and Ireland |
1997 |
| European Association for Endoscopic Surgery |
1997 |
| International Society of Surgery (ISS)(SIC) |
2006 |
| European Surgical Association |
2006 |