Hon. Consultant Neurologist, Charing Cross Hospital 1991-2005; Consultant Neurologist; Medical Ophthalmology Unit, St Thomas' Hosp.,1963-85; Physician i/c, Dept. of Neurology, Regional Neurosciences Centre, Charing Cross Hosp., 1965-91; Chairman, European Stroke Prevention Study, 1981-88; Founder Motor Neurone Disease Association,1988 (Med.Patron,1978-90); President, Med.Soc.London,1983-84 (Treas.,1984-89); President Section of Neurology, RSM, 1990-91; Sec-Treas. Gen., World Federation of Neurology, 1989-98; Trustee, Migraine Trust (Chm., 1988-96); Guest Lectr, Scandinavian Migraine Soc., 1983, Hon. Member, Neurol Soc. of Thailand, 1992 and Austrian Soc. of Neurol., 1992; Hon. Life Mem., Internat. Headache Soc., 1997, Harold Wolff Award, 1981 and, 1984, and Distinguished Clinician Award, 1986; Amer. Assoc. for the Study of Headache, Louis Boshes Award, Northwestern Univ., Chicago, 1994. Editor; World Neurology, 1990-98; Founder Journal of Hist. of Neuroscience, 1992 ; Publications 70+ books (co-author, editor and co-editor on neurological subjects)