An independent evaluation of the cluster approach was carried out in 2007. The review found that"““Most evident were improvements made in filling gaps and extending capacity. Predictability of leadership was also considerably enhanced by lead agencies accepting responsibility for the totality of their sectors.â€â€"The Department for International Development (DFID) continues to work with the Emergency Relief Coordinator, Sir John Holmes, the UN Office for the Coordination of Humanitarian Affairs (OCHA) and lead agencies at both policy and operational levels to ensure cluster leadership responsibilities are a core function of their organisation.