Simon Marsh: Profile


Mr Simon Marsh trained at Trinity College Cambridge and the Clinical School, Addenbrooke’s Hospital, and was one of the few students to be awarded the William Harvey Studentship in consecutive years.  His MD thesis, from the University of Cambridge focused on the role of growth factors in breast cancer. 

The Gilmore Groin and Hernia Clinic has treated more than 8000 people for groin problems, including over 400 internationals, since it was founded in 1980. It pioneered the team approach to diagnosis and treatment of groin problems and is part of the London Sports Injury Clinic. The standard anatomical repair of Gilmore’s Groin is now termed the Marsh Modification of the Gilmore Technique, reflecting the adaptations that have been made since 2010.

It is this combination of research and clinical excellence that ensures that Mr Marsh is able to provide the best standards of treatment and care to his patients.


His MD thesis from the University of Cambridge and carried out at Charing Cross Hospital focused on the role of growth factors in breast cancer. He is Senior Consultant Surgeon with an interest in breast diseases and surgical oncology at the Colchester Breast Unit in Essex and has been a member of The London Breast Clinic and The Gilmore Groin & Hernia Clinic since 1999.

Following qualification he developed an interest in sports medicine and has advised on many sports, including equestrian events, motorcycle speedway and rugby.

This expertise has ensured his success since joining The Gilmore Groin and Hernia Clinic where he has become adept and experienced in assessing, diagnosing and treating patients, not only with Gilmore’s Groin but patients with hernia of all types.

His general surgical background has led to an expertise in minor daycase surgery under local anaesthetic. At the One Stop Day Surgery Centre at 108 Harley Street he provides same day consultation and surgery for patients. He is on the surgical panel of The Mole Clinic providing rapid surgical access for their patients with suspicious lesions identified as requiring excision.

In 2006 he halved his workload within the NHS to dedicate more time to the Clinics at 108 Harley Street. He retains an active interest in cancer research and is an Honorary Senior Lecturer to the Department of Biomedical Sciences in the University of Essex.

Clinical interests

Breast Cancer, Breast Disease, Groin & Hernia, Thyroid disease and Minor day case surgery