The Tutors

Roger Groos

Roger Groos - colonic hydrotheraphy tutor at NCCH Roger Groos B.Sc. (Hons.) originally trained as a biologist and worked as an agronomist in the UK and overseas until retraining in Holistic Medicine in 1986; he added colonic hydrotherapy to his practice in 1988. Working broadly naturopathically, he combines dietary therapy, colonics, the use of herbs, reflexology and lymphatic drainage to treat and heal a broad range of health problems in his practice in Devon. In the past he has held clinics in Somerset and Cornwall.

He has long experience in teaching diet and nutrition, postgraduate training in colonics and has lectured on these subjects to various organisations around the UKans Spain. He was a founder member of ARCH, has been chairman on three occasions and is now the ARCH Honorary President. He has worked in clinics in South West England as well as the North Devon Hospice as their nutritional adviser. He is a director of the General Naturopathic Council and has been a Profession-Specific Board member of the Complementary and Natural Healthcare Council, the industry regulator.

His hobbies include gardening, especially vegetable growing, countryside walking, fishing and cooking as well DIY building.

Abigail Francis

Abigail Francis - colonic hydrotheraphy tutor at NCCH Abigail Francis has been a practising herbalist, iridologist, colonic hydrotherapist and body worker for over 20 years, having trained with Jill Davies, Milo Siewert and Richard Schultz to name but a few. She was awarded her full Naturopathic Diploma in 2013. She is also a member of the Association of Master Herbalists, Guild of Naturopathic Iridologists and ARCH.

Abi is a well experienced teacher, having taught iridology for several years with the Independent School of Iridology in the UK and overseas, and brings valuable expertise to the module 2 NCCH course

She hails from Norfolk, is a keen forager, gardener, an excellent vegetarian/vegan cook and does volunteer work with German Shepherd Rescue UK.

Abi can currently be seen treating one of her patients on the ARCH youtube video at

Jane Bush

Jane is a recent past Chair of ARCH and runs two busy clinics in Gedling, Nottingham. She is an all-rounder in body therapies and hosts some practical weeks for NCCH.

Dr Milo Siewert

Dr Milo Siewert - former colonic hydrotheraphy tutor at NCCH Dr Milo Siewert, the founder of ARCH in 1987 and the father of colonic hydrotherapy in the UK. He taught from 1986 and co-founded NCCH in 2005, then teaching Module 1 courses from his clinic in Poole until November 2012.  He sadly passed away in December, 2012, but his ethos and experience live on in NCCH.

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