Check out the bioethics section of the Faraday multimedia resources for a long list of helpful talks. Highlights include Denis Alexander’s Bioethics: Key Issues for Church Leaders, John Wyatt on Dying Well, and Paul Fairchild on Pluripotent Stem Cells: Medical Dream or Ethical Nightmare?
The Faraday Papers also give some introductions to bioethics, including the recent Ethical Issues In Human Genetic Engineering by Prof Keith Fox.