What is the fine-grained topic of the following text: Not very long ago, British Prime Minister David Cameron used an international forum in mid-November this year, the Commonwealth Heads of State Summit, in the South Asian nation Sri Lanka, to project himself and British regime he is heading as the paragon of virtue of media freedom among other sacred rights. Only return the topic.
British Prime Minister David Cameron's advocacy for media freedom at the Commonwealth Heads of State Summit in Sri Lanka.