Concert will begin at 16:25 hours GMT
Pipkov, Rachmaninov with Mladenov and Tchaikovsky's Fourth from Sofia
Atanas Mladenov, baritone, and the Bulgarian National Radio Choir and Symphony Orchestra conducted by Mark Kadin perform:
PIPKOV: Spring in Thrace.
RACHMANINOV: Spring, Cantata for baritone, choir and orchestra.
TCHAIKOVSKY: Symphony No. 4.