Professor Ailsa Hart


Medical interests: All of our private physicians have joined us at The Physicians' Clinic by invitation only. We have strict criteria for choosing all the private physicians within our teams.



Ailsa Hart is Director of St Mark's Hospital Inflammatory Bowel Disease Unit and Consultant Gastroenterologist. She is Sub-Dean of St Mark's Hospital Academic Institute. In 2016, she achieved academic promotion with Imperial College and is now Professor of Practice.

Ailsa Hart studied medicine at Oxford University and was awarded a First Class Honours Degree in 1992, together with the George Pickering Prize for Medicine and Surgery proxime accessit in 1995 and additional prizes for outstanding achievements. She achieved Membership of the Royal College of Physicians in 1998 and subsequently Fellowship of the Royal College of Physicians. She trained in Gastroenterology and General Internal Medicine in London and also received training at the Academic Medical Centre, Amsterdam. She achieved her PhD with Imperial College in 2005.

Her clinical work covers the spectrum of gastrointestinal diseases, with a particular interest in inflammatory bowel diseases (IBD), Crohn's disease, and ulcerative colitis. Her research interests focus on intestinal immunology and bacteriology, aiming to further our understanding of the pathogenesis of inflammatory intestinal disorders via clinical trials and translational research. She has links with laboratories within Imperial College, particularly metabolic profiling, bacteriology and mucosal immunology. She has piloted faecal transplantation as a treatment for refractory pouchitis, funded by the Eli and Edyth Broad Foundation and has an ongoing research interest in the gut microbiome. Other particular research interests include pathogenesis of IBD, role of vitamin D, perianal Crohn's disease, pouchitis and surveillance of IBD patients for dysplasia or colorectal cancer. She has supervised/ co-supervised over 20 higher degree students and lectures widely nationally and internationally.

She is currently Chair of the British Society of Gastroenterology Gut Microbiota for Health Group. She has been a member of the Clinical Committee of the European Crohn's and Colitis Organisation (ECCO); is on the IBD Clinical Research Group Committee for the British Society of Gastroenterology; UK Patient and Public Involvement Lead for Gastroenterology; on the Research Committee for the Crohn's and Colitis UK charity; collaborates widely across the UK particularly within the UK IBD Genetics Consortium; and is a member of the International Organisation for IBD (IOIBD), which is a group of approximately 50 top clinicians globally involved in IBD – she is only one of three members from the UK and the only UK woman involved.

She is Associate Editor of the popular gastroenterology journal Alimentary Pharmacology and Therapeutics, has published two books, with "Inflammatory Bowel Disease – an Evidence-based Practical Guide" selling over 2500 copies, and more than 130 papers and book chapters.

Recent feedback from a patient was "Prof Hart is like IBD royalty - you just know you're in the safest, most capable and best possible hands. There's the National IBD Standards and then there's the Ailsa Hart IBD care standards, which are even higher and unbeatable."


I have expertise and many years' experience in all aspects of gastroenterology.

Symptoms investigated

  • Diarrhoea
  • Constipation
  • Rectal bleeding
  • Abdominal pain/ bloating/ discomfort
  • Iron deficiency anaemia
  • Nausea/ vomiting
  • Reflux/ dyspepsia
  • Weight loss

Procedures performed

I offer the following procedures for diagnosis and treatment:

  • Upper GI endoscopy and gastroscopy (OGD)
  • Colonoscopy
  • Flexible sigmoidoscopy

Conditions diagnosed and treated

  • Inflammatory bowel disease (IBD) specifically ulcerative colitis and Crohn's disease
  • Functional bowel disease specifically irritable bowel syndrome (IBS)
  • Upper gastrointestinal disease including dyspepsia and reflux

Research interests

  • Inflammatory bowel disease
  • Immunology of inflammatory bowel disease
  • Development of probiotics
  • Role of the microbiome
  • Modulation of the microbiome

Medical Background

Medical training

Dr Ailsa Hart studied Medicine at Oxford University, graduating with First Class Honours and being awarded the George Pickering Prize proxime accessit for Medicine and Surgery in 1995.

Dr Hart became a Member of the Royal College of Physicians in 1998 and specialised in the field of gastroenterology. Clinical training in gastroenterology was received in London at the Barts and The London, University College London Hospitals, St Mark's Hospital, and at the Academic Medical Centre in Amsterdam.

She completed a Wellcome Research Fellowship and achieved her PhD in 2005. She has published 2 books, and 70 medical papers, reviews and book chapters and is passionate about training and teaching. She has lectured nationally and internationally at over 150 meetings.

Current appointments

Dr Hart is Lead of the Inflammatory Bowel Disease Unit at St Mark's Hospital, which is an internationally recognised centre of excellence in inflammatory bowel disease, gastrointestinal endoscopy, intestinal failure and colorectal surgery. She is also Senior Clinical Lecturer at Imperial College, London. She achieved a Higher Education Funding Council of England Award in 2008 enabling her to spend half of her time performing clinical work and half her time in research. She is a member of national and international advisory boards and steering committees and a member of the British Society of Gastroenterology and of the European Crohn's and Colitis Organisation.

NHS posts

Senior Clinical Lecturer at Imperial College London, Lead of IBD Unit/Consultant Gastroenterologist at St Mark's Hospital, which is part of the North West London Hospitals NHS Trust.


In clinic
Clinic times*
In clinic: Yes
Clinic times*: 9am - 1pm

*Other times may be available on request


Type of patient Initial consultation Follow up consultation
Self pay £300 £200
Insured Within the schedule of charges for specific insurance companies* Within the schedule of charges for specific insurance companies*

*Please also note that some policies do not cover consultations – always check your policy conditions or contact with your insurer as necessary.

Our temporary opening hours are now from Monday – Friday 08.00 – 20.00


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