In 2005, Isabelle Dinoire become the first person to receive a new face. The decision made by French surgeons to perform the operation went against the findings of almost every other ethical committee in the world and has since sparked a fierce debate over the ethics of the operation. In the UK, a team led by Peter Butler struggles to get approval to perform the first full face transplant. Do the risks outweigh the benefits? Are face transplants really in the best interest of the patient? Horizon investigates.