The single greatest concentration of medical expertise anywhere in the world is located in the heart of London in Harley Street and its immediate environs. In this one small precinct there are over 1,400 specialist medical and dental consultants and practitioners, leading edge medical science and technology, proximity to some of the world's leading private hospitals and the full array of laboratory and ancillary support. It is the proximity of such a diversity of medical and dental skills and facilities and its immediate availability which makes the area unique.