St Mark's HospitalLondon North West Healthcare

Professor Siwan Thomas-Gibson MBBS BSc FRCP MD 
Consultant Gastroenterologist 
Honorary Senior Lecturer; Imperial College
Dean, St Mark’s Academic Institute

Professor Siwan Thomas-Gibson is a gastrointestinal endoscopist and luminal gastroenterologist. She has been a consultant at the hospital since 2006 and is the deputy director of the Bowel Cancer Screening unit. She was Clinical lead for the department from 2011-2016 and is currently Dean of the hospital. Siwan was appointed to the prestigious post of Chair of JAG from January 2017 to January 2020, overseeing the quality of endoscopy services and training throughout the UK.


NHS Medical Secretary
Name: Bharti Jhuti
Tel: 02082354091

Private Secretary
Name: Alice Azzopardi
Tel: 0208 051 2326
Fax: 01245 200 699