David became interested in homoeopathy when he was still a medical student. He qualified from Guys in 1975, gained his MFHom in 1978, and since 1982 he has taught at several colleges of homoeopathy in England , Ireland and Canada. He has attended many seminars given by well known homoeopaths throughout the world and as an expert in homoeopathic philosophy, has given masterclasses himself on the second prescription. He practises in London and Oxford.