Clinical team

If you would like to contact any of the individuals listed below, please contact the JAG office by email at

You can also read about the JAG office team here.

Professor Matt Rutter

JAG Chair

I am delighted to have been appointed as the next JAG Chair. Throughout my career, JAG has been pivotal in the modernisation of UK endoscopy services and endoscopy training. Despite the many challenges that our specialty faces, both new and old, the UK’s multidisciplinary endoscopy community remains its strongest asset. I look forward to working with the JAG team and the endoscopy community at large to help us overcome these challenges and to continue to evolve our services to deliver the highest quality care for our patients and population.


Dr Mark Jarvis

JAG accreditation Chair

Mark trained at Oxford University and Imperial College London, gaining the Rudolph Kohnstamm prize for clinical medicine before qualifying in 1999. Based mainly in England he has also worked in Glasgow and in New Zealand. He accepted his current post as a Consultant Gastroenterologist in Basildon, Essex in 2013. Mark has a passion for clinical quality in endoscopy. He became a JAG assessor in 2019 and Chair of JAG accreditation in 2022.


Miss Sarah Mills

JAG training Chair

Sarah is a Consultant Colorectal Surgeon at Chelsea and Westminster Hospital and Chair of ACPGBI Colonoscopy Committee. She is passionate about improving access to and quality of endoscopy training in the UK

Debbie Johnston

Head assessor for accreditation

Debbie is the head assessor, providing expert leadership to over 30 assessors, ensuring consistent application of the JAG standards, and assessments of the highest possible quality. She has over 30 years’ experience in healthcare in nursing, managerial, quality improvement and quality assurance roles, and has played a key role in the development of JAG accreditation since its establishment in 1994.

Photo of Debbie Johnston

Helen Griffith 

JAG Nurse Lead 

Helen has contributed to the development of endoscopy services during her thirty three year career in the speciality. This includes roles as a nurse consultant, clinical endoscopist, national nurse advisor to the NHSBCSP, decontamination advisor to the BSG, and as a lead assessor for JAG. Although semi-retired, Helen has seen and assisted in the considerable improvement in quality and safety of endoscopy service in the UK. Helen will take over the position of JAG Nurse Lead in September.


Mark Donnelly

Bowel cancer screener accreditation (BCSA) Panel Chair

Dr Mark Donnelly is chair of the BCSA programme accreditation panel. He is a Consultant Gastroenterologist in Sheffield. He has been a screener for 15 years and has conducted numerous accreditation days both in Sheffield and elsewhere. He is the Clinical Director of the South Yorkshire and Bassetlaw Bowel Cancer Screening Centre. His other main interest is endoscopy training, and he established the Sheffield Endoscopy Training Centre in 2001, one of the original JAG endoscopy training centres. The centre has delivered in excess of 200 JAG approved hands-on endoscopy training courses. He has an international reputation as an endoscopy trainer, delivering training courses in India, Bangladesh, Sudan, Cairo and throughout Europe. He is currently the foundation Clinical Director of the Yorkshire Endoscopy Training Academy (YETA).

Dr Jamie Barbour

Federation of Training Centres (FTC) Clinical Lead

Dr Jamie Barbour is a Consultant Gastroenterologist at Queen Elizabeth Hospital in Gateshead, England. Jamie has a special interest in both advanced endoscopy and training endoscopy. 

He developed Endoscopic Mucosa Resection (EMR) since arriving at Gateshead in 2007 and went on to set up regional services for Endoscopic Submucosal Dissection (ESD) and endoscopic treatment for achalasia (POEM). 

He has been running regular endo courses at Gateshead for 10+ years and has been lucky enough to join other colleagues running courses in the UK and internationally. He is the JAG Regional Training Centre lead with Maria Pettman where they represent and promote the basic and advance courses that are running in the UK from Training centres providing JAG approved endoscopy courses.


Maria Pettman

Federation of Training Centres (FTC) Operational Lead

Maria Pettman, Registered Nurse (RGN), dip onc, MSc. 

Maria is an Independent Nurse Consultant/Endoscopist in Derbyshire and South Yorkshire. Currently working as BCSP endoscopist throughout the region as well as performing service and training lists. Nurse Representative on the ACPGBI colonoscopy committee and previous chair of the ACPN.


Miss Henna Rafique

JETS Clinical Lead

Miss Henna Rafique is a consultant colorectal surgeon at University College London Hospital. She has interests in locally advanced and recurrent rectal cancers, inflammatory bowel disease and pouch surgery. She is a JAG certified endoscopist and is JETS national clinical lead for JAG and the Royal College of Physicians.