Sunday is World Aids Day. What started as an outbreak has become an epidemic threatening 40million people worldwide, claiming 8,000 lives every day. Yet Aids, after the initial shock subsided, has fallen woefully from the world agenda. In response - and in an almost unprecedented move in the charity world - the Stop Aids Campaign, a coalition of 22 charities, has come together to speak with one voice calling for action, awareness and a new government response.