The search continues for the world's next opera star as five more young singers compete to be become BBC Cardiff Singer of the World. Petroc Trelawny and American soprano Angel Blue are at St David's Hall in Cardiff to guide us through the highlights of the performances by singers from England, South Africa, Ukraine, Turkey and the USA. Vocal coach and Cardiff Singer regular Mary King and South African baritone Jacques Imbrailo, who picked up the BBC Cardiff Singer of the World Audience Prize in 2007, are on hand to give their views on the performances. The BBC National Orchestra of Wales is conducted by Thomas Sondergard. Show less