Dr Gareth Sadler

Consultant Gastroenterologist


Specialises in

  • Bowel disease
  • Gastrointestinal pathology
  • Liver and kidney test
  • Sees adults only at Spire Gatwick Park Hospital

Also available for:

Virtual consultations:

I have been a Consultant Gastroenterologist for nine years.

My main sub-specialty interest lies in endoscopy and specifically bowel cancer screening.

I have personally performed or supervised over 3,000 gastroscopies, 3,000 flexible sigmoidoscopies and 4,000 colonoscopies.

I am the current Director of the Bowel Cancer Screening Program for South-West London. I am a JAG-accredited Bowel Screening Colonoscopist and an examiner for the Bowel Scope Screening programme. I also maintain a significant interest in endoscopy training and was the previous Endoscopy Training Lead at St George's Hospital for over 3 years. I lead endoscopy training courses held at the National Endoscopy Training Centre at St George's Hospital, including the Colonoscopy, Therapeutic and Clinical Endoscopist courses.

Sees adults only at Spire Gatwick Park Hospital


General Medical Council Number: C4711625

Treatment information

Some of the principal treatments carried out by Dr Gareth Sadler at Spire include:


Get in touch

Important information about COVID-19 tests

COVID-19 testing or antibody tests are not available as a standalone service at Spire Gatwick Park Hospital.


Marketing Information

Spire would like to provide you with marketing information about products and services offered by Spire and by selected third-party partners. If you do not consent for us to process your personal data for marketing activities, we will still be able to contact you about your enquiry.

We may contact you by email, SMS or phone about your enquiry. If we try to contact you by phone (mobile and/or landline) and you are not available, we may leave you a voicemail message. We may also use your details to contact you about patient surveys we use for improving our service or monitoring outcomes, which are not a form of marketing.

Submit my enquiry

Additional information

Bowel disease
Gastrointestinal pathology

MBChB / University of Birmingham / 2000
Bachelor of Medicine, Bachelor of Surgery

Professional memberships

General Medical Council

British Society of Gastroenterology

Professional leadership

Director of the Bowel Cancer Screening Program for South West London
Deputy Lead for Endoscopy Training at St George's Hospital

St George's University Hospitals NHS Foundation Trust

Family life is hugely important to me and I spend any opportunity I can exploring the local countryside or venturing out on day-trips with my wife and two children. I enjoy keeping active in body and mind, and can often be found of an evening either in the local gymnasium, out running, or playing squash. I especially enjoy good literature, fine ale, and a good anecdote.