Do you own your body? Advances in science and the development of genetic databases have given this question an aura of modern controversy. However, English law governing separated biological materials is in an unsatisfactory state. Despite the enactment of the Human Tissue Act 2004 UK, it is not clear, for example, what property rights or non-proprietary interests living persons can claim over their separated biological materials. The development of clear legal principles is necessary, however, to enable individuals to have effective control over such materials and to enable the efficient use of such materials in medical research. Part I lays the theoretical foundation for the thesis. This opening part examines the nature of property and de...