 The best-interest principle should arguably have only limited application. It is not possible unambiguously to interpret the best interests of a child in terms of a hypothetical adult self, and any objective interpretation will be the subject of contested views. A child’s right to be heard in matters affecting its interests is a substitute not a complement to the right of choosing for herself, and the Gillick competence which qualifies a child to exercise its rights of decision-making is arguably stringently defined.