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.

Dr Mark Coleman

Chair of JAG

Mark has been a colorectal surgeon in Plymouth since 2001. He led Lapco, the national training programme for laparoscopic colorectal surgery in England, transforming the uptake of this procedure nationally and internationally. He is founder and chair of Bowel Cancer West which supports training, research and awareness across south-west England and Wales. He chaired the external affairs committee at the Association of Coloproctology (ACP) from 2011-2016 where he led the redevelopment of the ACP website and the creation of a YouTube channel for the journal Colorectal Diseases. He lives on the beautiful rain-soaked edge of Dartmoor with his wife, son and a variable menagerie of animals.

Dr Chris Healey

Chair of JAG accreditation

Chris was appointed as the chair of ESQAG in 2019 and is also a lead assessor on JAG accreditation assessments. Christopher trained in Medicine in Sheffield and graduated with Honours in 1987, including a distinction in surgery and psychiatry. In 1998, Christopher worked as a Senior Registrar in Cambridge before accepting his current post in 1988 as a consultant gastroenterologists in Keighley, West Yorkshire. Since 2007, Dr Healey has taken part in general medicine and has since become a NHSBCSP colonoscopists, before joining the JAG team as an assessor in 2009. 


Dr Geoff Smith 

Chair of JAG training

Geoff is a luminal gastroenterologist at Imperial College Healthcare NHS Trust in west London. He has been a screening colonoscopist for over 10 years and is faculty on Colonoscopy training courses at St George’s Hospital. He is also deputy postgraduate dean for North West London, chair of the exam board for the European Specialty Examination in Gastroenterology and Hepatology, and chair of the Bowel Cancer Screening MCQ group. His academic interests focus on cognitive load in skills training and the development of training systems for complex medical interactions such as ward rounds. 


Debbie Johnston

Head assessor for accreditation

Debbie is the head of assessors, 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 the JAG scheme since its establishment in 1994. Debbie has developed advanced skills in many areas, including: training and leadership skills development; quality improvement; assessor training and development; change management; programme and business management skills.

 Photo of Debbie Johnston

Richard Robinson

Chair of Bowel Cancer Screening Programme (BCSP) Accreditation Panel

Richard is the chair of the BCSP Accreditation Panel, having been a bowel cancer screening colonoscopist for over 10 years. He has a long standing interest in endoscopy training and assessment having established Leicester as a JAG training centre in 2004 and more recently as an Accreditation Centre for both BowelScope and BCS. He is Clinical Director of the University of Leicester Hospitals Bowel Cancer Screening Service. In 2014, he established the Ghana Endoscopy Project and with colleagues has regularly taught Training the Trainer Colonoscopy courses and basic endoscopic skills courses in Ghana.

Professor Matt Rutter

Chair of the National Endoscopy Database (NED) working group

Matt is professor of gastroenterology at Durham University, specialising in advanced diagnostic colonoscopy, polypectomy and IBD. Matt leads the group developing the National Endoscopy Database (NED)

Photo of Matt Rutter

Dr James East

Chair of the JAG research committee

James is a gastroenterology and clinical lead at Oxford University Hospitals and is also the Director for the Oxfordshire Bowel Cancer Screening programme.

James joins JAG to chair the new JAG research committee.



Phedra Dodds

JETS Workforce lead

Phedra has been chair of the Welsh Endoscopy Nurse Training faculty since 2015 and has focused on quality improvement as part of the national endoscopy team where she was lead nurse from 2002-2015. Phedra is responsible for providing leadership and direction for the JETS workforce training programme and leads on the implementation of competency framework and training packages.

Jon Walton

Training centre and course QA lead 

Jon has been working within the NHS for over 10 years with the last 4 years of this as the Endoscopy Clinical Auditing and Training officer within St Mark’s Hospital in London. He is responsible for the coordination and delivery of the JAG certified courses within the trust, he is also primarily responsible for all departmental auditing relating to JAG as well as the cross-site completing of GRS annually as well as site visits.

He has previously worked for the Hertfordshire Partnership University NHS Foundation Trust within mental health specifically looking at how best to quality assure service users experience and expectations of services.

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