Professor E H Grant has been studying the interaction of microwaves with biological material for 50 years. He served in the Physics Departments of three London Teaching Hospitals before joining Queen Elizabeth College, and subsequently King's College London, where he was Head of Department from 1992 to 1994. He retired in 1996 and joined MCL as Principal Scientific Consultant and Non-Executive Director. He was a member of the Board of NRPB from 1989 to 1997 and was a member of the NRPB Advisory Group on Non-Ionising Radiation for 11 years. Professor Grant is also Chaiman of the BSI GEL 106 Committee concerned with the development of international standards to assess human exposure to electromagnetic fields.