The opera world comes to Cardiff in search of the next classical singing sensation. Round four, and with their eyes on the prize are singers from Australia, Chile, USA, the Czech Republic and, representing Wales, local girl Natalya Romaniw.

Joining presenter Petroc Trelawny is celebrated bass-baritone Gerald Finley, with top vocal coach Mary King offering expert analysis and Josie D'Arby talking to the competitors in rehearsal

Voting on the Audience Prize will close on Sunday 14th June at 11am. Please do not call after this time as your vote won't be counted and you may be charged. Show less