A one-year-old boy at the centre of a "right-to-life" legal dispute would not benefit from an operation to help him breathe, the High Court has been told. The child, known as Baby RB, has a rare, genetic condition that makes it hard for him to breathe independently. But a leading paediatrician, known as Dr F, said he was "not a candidate" for surgery to try to open up his airway. Baby RB's father is fighting a hospital's attempt - backed by the mother - to withdraw his life support.