Keith has a Masters in Herbal Medicine and is a Fellow of the National Institute of Medical Herbalists. After serving on the NIMH Council he established the Scottish School of Herbal Medicine in Glasgow with his ex-wife Maureen in 1992 where they ran the School for 18 years training to BSc (Hons) and MSc level. A correspondence pre-course and apprenticeship programme is now run from his herb farm on the Isle of Arran, which researches herbal medicines and vegan organic growing techniques. He has been in practice since 1989. Keith has been heavily involved in community projects on Arran and is chair of Roots of Arran Community Woodland Charity.